./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe012_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe012_power.opt.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/safe012_power.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe012_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 00:20:37,767 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:20:37,840 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:20:37,844 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:20:37,844 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:20:37,867 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:20:37,867 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:20:37,868 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:20:37,868 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:20:37,871 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:20:37,871 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:20:37,872 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:20:37,872 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:20:37,873 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:20:37,873 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:20:37,874 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:20:37,874 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:20:37,874 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:20:37,874 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:20:37,874 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:20:37,875 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:20:37,875 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:20:37,875 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:20:37,875 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:20:37,876 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:20:37,876 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:20:37,876 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:20:37,876 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:20:37,877 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:20:37,877 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:20:37,878 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:20:37,878 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:20:37,878 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:20:37,878 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:20:37,878 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:20:37,879 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:20:37,879 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:20:37,879 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:20:37,879 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:20:37,879 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:20:37,879 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:20:37,880 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:20:37,880 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:20:37,880 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 00:20:38,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:20:38,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:20:38,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:20:38,079 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:20:38,084 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:20:38,085 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe012_power.opt.i [2024-06-28 00:20:39,114 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:20:39,266 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:20:39,266 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_power.opt.i [2024-06-28 00:20:39,280 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09f511768/82ba2bec9153488d9f4a30e39ac43c96/FLAGa66476145 [2024-06-28 00:20:39,289 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09f511768/82ba2bec9153488d9f4a30e39ac43c96 [2024-06-28 00:20:39,291 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:20:39,292 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:20:39,292 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe012_power.opt.yml/witness.yml [2024-06-28 00:20:39,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:20:39,344 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:20:39,344 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:20:39,344 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:20:39,348 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:20:39,348 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:20:39" (1/2) ... [2024-06-28 00:20:39,349 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@341db987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:20:39, skipping insertion in model container [2024-06-28 00:20:39,349 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:20:39" (1/2) ... [2024-06-28 00:20:39,350 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@74821d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:20:39, skipping insertion in model container [2024-06-28 00:20:39,350 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:20:39" (2/2) ... [2024-06-28 00:20:39,350 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@341db987 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:20:39, skipping insertion in model container [2024-06-28 00:20:39,351 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:20:39" (2/2) ... [2024-06-28 00:20:39,351 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:20:39,375 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:20:39,376 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ! multithreaded || (((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )z >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL) && (0LL - (long long )y) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff0_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff1 >= 0LL) && (long long )__unbuffered_p2_EAX$read_delayed - (long long )y$mem_tmp >= 0LL) && (long long )__unbuffered_p2_EAX$read_delayed - (long long )weak$$choice0 >= 0LL) && (long long )__unbuffered_p2_EAX$read_delayed - (long long )weak$$choice2 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$r_buff1_thd2 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff0 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd2 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff1_thd2 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-28 00:20:39,376 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] ! multithreaded || (((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )z >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL) && (0LL - (long long )y) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff0_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff1 >= 0LL) && (long long )__unbuffered_p2_EAX$read_delayed - (long long )y$mem_tmp >= 0LL) && (long long )__unbuffered_p2_EAX$read_delayed - (long long )weak$$choice0 >= 0LL) && (long long )__unbuffered_p2_EAX$read_delayed - (long long )weak$$choice2 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$r_buff1_thd2 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff0 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd2 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff1_thd2 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-28 00:20:39,376 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ! multithreaded || (((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )z >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL) && (0LL - (long long )y) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff0_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff1 >= 0LL) && (long long )__unbuffered_p2_EAX$read_delayed - (long long )y$mem_tmp >= 0LL) && (long long )__unbuffered_p2_EAX$read_delayed - (long long )weak$$choice0 >= 0LL) && (long long )__unbuffered_p2_EAX$read_delayed - (long long )weak$$choice2 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$r_buff1_thd2 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff0 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd2 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff1_thd2 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-28 00:20:39,377 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:20:39,377 INFO L106 edCorrectnessWitness]: ghost_update [L851-L851] multithreaded = 1; [2024-06-28 00:20:39,413 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:20:39,698 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:20:39,711 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:20:39,882 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:20:39,908 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:20:39,908 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:20:39 WrapperNode [2024-06-28 00:20:39,908 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:20:39,909 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:20:39,909 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:20:39,909 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:20:39,914 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:20:39" (1/1) ... [2024-06-28 00:20:39,927 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:20:39" (1/1) ... [2024-06-28 00:20:39,968 INFO L138 Inliner]: procedures = 175, calls = 66, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 201 [2024-06-28 00:20:39,969 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:20:39,969 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:20:39,969 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:20:39,969 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:20:39,978 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:20:39" (1/1) ... [2024-06-28 00:20:39,978 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:20:39" (1/1) ... [2024-06-28 00:20:39,982 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:20:39" (1/1) ... [2024-06-28 00:20:39,995 INFO L175 MemorySlicer]: Split 24 memory accesses to 2 slices as follows [2, 22]. 92 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-28 00:20:39,995 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:20:39" (1/1) ... [2024-06-28 00:20:39,995 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:20:39" (1/1) ... [2024-06-28 00:20:40,003 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:20:39" (1/1) ... [2024-06-28 00:20:40,006 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:20:39" (1/1) ... [2024-06-28 00:20:40,007 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:20:39" (1/1) ... [2024-06-28 00:20:40,009 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:20:39" (1/1) ... [2024-06-28 00:20:40,012 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:20:40,013 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:20:40,013 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:20:40,013 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:20:40,014 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:20:39" (1/1) ... [2024-06-28 00:20:40,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:20:40,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:20:40,047 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) [2024-06-28 00:20:40,063 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 [2024-06-28 00:20:40,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 00:20:40,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 00:20:40,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 00:20:40,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 00:20:40,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:20:40,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:20:40,082 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 00:20:40,082 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 00:20:40,082 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 00:20:40,083 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 00:20:40,083 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 00:20:40,083 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 00:20:40,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:20:40,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 00:20:40,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:20:40,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:20:40,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:20:40,086 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:20:40,239 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:20:40,241 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:20:40,595 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:20:40,596 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:20:40,846 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:20:40,846 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 00:20:40,846 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:20:40 BoogieIcfgContainer [2024-06-28 00:20:40,847 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:20:40,849 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:20:40,849 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:20:40,851 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:20:40,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:20:39" (1/4) ... [2024-06-28 00:20:40,852 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b449b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:20:40, skipping insertion in model container [2024-06-28 00:20:40,852 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:20:39" (2/4) ... [2024-06-28 00:20:40,852 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b449b5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:20:40, skipping insertion in model container [2024-06-28 00:20:40,852 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:20:39" (3/4) ... [2024-06-28 00:20:40,854 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b449b5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:20:40, skipping insertion in model container [2024-06-28 00:20:40,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:20:40" (4/4) ... [2024-06-28 00:20:40,855 INFO L112 eAbstractionObserver]: Analyzing ICFG safe012_power.opt.i [2024-06-28 00:20:40,869 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:20:40,869 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 00:20:40,869 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:20:40,920 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 00:20:40,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 00:20:41,004 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-28 00:20:41,004 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:20:41,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 00:20:41,006 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 00:20:41,008 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-28 00:20:41,014 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:20:41,019 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;@b8ba28b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:20:41,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 00:20:41,022 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:20:41,022 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 00:20:41,022 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:20:41,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:41,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:20:41,023 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:20:41,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:41,026 INFO L85 PathProgramCache]: Analyzing trace with hash 705409999, now seen corresponding path program 1 times [2024-06-28 00:20:41,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:41,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340047887] [2024-06-28 00:20:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:41,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:20:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:20:41,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:20:41,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340047887] [2024-06-28 00:20:41,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340047887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:20:41,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:20:41,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:20:41,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137658773] [2024-06-28 00:20:41,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:20:41,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:20:41,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:20:41,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:20:41,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:20:41,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-28 00:20:41,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:41,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:20:41,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-28 00:20:41,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:20:42,008 INFO L124 PetriNetUnfolderBase]: 327/586 cut-off events. [2024-06-28 00:20:42,009 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-06-28 00:20:42,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1149 conditions, 586 events. 327/586 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3326 event pairs, 131 based on Foata normal form. 2/574 useless extension candidates. Maximal degree in co-relation 1137. Up to 503 conditions per place. [2024-06-28 00:20:42,016 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 27 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2024-06-28 00:20:42,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 40 transitions, 152 flow [2024-06-28 00:20:42,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:20:42,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:20:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-28 00:20:42,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-28 00:20:42,027 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 72 transitions. [2024-06-28 00:20:42,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 40 transitions, 152 flow [2024-06-28 00:20:42,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 148 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:20:42,032 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 91 flow [2024-06-28 00:20:42,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2024-06-28 00:20:42,036 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2024-06-28 00:20:42,036 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 91 flow [2024-06-28 00:20:42,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:42,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:42,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:20:42,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:20:42,037 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:20:42,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:42,039 INFO L85 PathProgramCache]: Analyzing trace with hash -218832693, now seen corresponding path program 1 times [2024-06-28 00:20:42,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:42,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966753859] [2024-06-28 00:20:42,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:42,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:20:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:20:42,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:20:42,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966753859] [2024-06-28 00:20:42,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966753859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:20:42,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:20:42,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:20:42,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667354271] [2024-06-28 00:20:42,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:20:42,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:20:42,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:20:42,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:20:42,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:20:42,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:20:42,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:42,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:20:42,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:20:42,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:20:42,904 INFO L124 PetriNetUnfolderBase]: 535/937 cut-off events. [2024-06-28 00:20:42,904 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2024-06-28 00:20:42,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2021 conditions, 937 events. 535/937 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5043 event pairs, 241 based on Foata normal form. 3/933 useless extension candidates. Maximal degree in co-relation 2008. Up to 809 conditions per place. [2024-06-28 00:20:42,909 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 40 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-06-28 00:20:42,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 261 flow [2024-06-28 00:20:42,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:20:42,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:20:42,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-28 00:20:42,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 00:20:42,911 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 91 flow. Second operand 5 states and 105 transitions. [2024-06-28 00:20:42,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 261 flow [2024-06-28 00:20:42,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:20:42,913 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 163 flow [2024-06-28 00:20:42,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=163, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-06-28 00:20:42,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2024-06-28 00:20:42,914 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 163 flow [2024-06-28 00:20:42,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:42,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:42,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:20:42,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:20:42,914 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:20:42,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:42,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1806122734, now seen corresponding path program 1 times [2024-06-28 00:20:42,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:42,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314848081] [2024-06-28 00:20:42,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:42,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:20:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:20:43,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:20:43,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314848081] [2024-06-28 00:20:43,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314848081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:20:43,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:20:43,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:20:43,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888893530] [2024-06-28 00:20:43,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:20:43,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:20:43,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:20:43,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:20:43,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:20:43,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:20:43,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 163 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:43,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:20:43,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:20:43,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:20:43,741 INFO L124 PetriNetUnfolderBase]: 530/923 cut-off events. [2024-06-28 00:20:43,742 INFO L125 PetriNetUnfolderBase]: For 474/474 co-relation queries the response was YES. [2024-06-28 00:20:43,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2363 conditions, 923 events. 530/923 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4816 event pairs, 244 based on Foata normal form. 2/923 useless extension candidates. Maximal degree in co-relation 2344. Up to 801 conditions per place. [2024-06-28 00:20:43,749 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 48 selfloop transitions, 13 changer transitions 0/69 dead transitions. [2024-06-28 00:20:43,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 69 transitions, 362 flow [2024-06-28 00:20:43,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:20:43,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:20:43,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-28 00:20:43,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4801587301587302 [2024-06-28 00:20:43,753 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 163 flow. Second operand 6 states and 121 transitions. [2024-06-28 00:20:43,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 69 transitions, 362 flow [2024-06-28 00:20:43,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 69 transitions, 362 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-28 00:20:43,756 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 254 flow [2024-06-28 00:20:43,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-06-28 00:20:43,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-28 00:20:43,757 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 254 flow [2024-06-28 00:20:43,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:43,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:43,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:20:43,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:20:43,758 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:20:43,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:43,759 INFO L85 PathProgramCache]: Analyzing trace with hash 155231562, now seen corresponding path program 1 times [2024-06-28 00:20:43,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:43,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79180304] [2024-06-28 00:20:43,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:43,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:20:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:20:44,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:20:44,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79180304] [2024-06-28 00:20:44,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79180304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:20:44,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:20:44,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:20:44,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789765009] [2024-06-28 00:20:44,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:20:44,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:20:44,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:20:44,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:20:44,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:20:44,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:20:44,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 254 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:44,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:20:44,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:20:44,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:20:44,905 INFO L124 PetriNetUnfolderBase]: 522/911 cut-off events. [2024-06-28 00:20:44,906 INFO L125 PetriNetUnfolderBase]: For 918/918 co-relation queries the response was YES. [2024-06-28 00:20:44,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2657 conditions, 911 events. 522/911 cut-off events. For 918/918 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4755 event pairs, 228 based on Foata normal form. 4/913 useless extension candidates. Maximal degree in co-relation 2631. Up to 767 conditions per place. [2024-06-28 00:20:44,911 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 54 selfloop transitions, 15 changer transitions 0/77 dead transitions. [2024-06-28 00:20:44,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 77 transitions, 462 flow [2024-06-28 00:20:44,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:20:44,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:20:44,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-28 00:20:44,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-28 00:20:44,912 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 254 flow. Second operand 7 states and 140 transitions. [2024-06-28 00:20:44,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 77 transitions, 462 flow [2024-06-28 00:20:44,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 77 transitions, 455 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-28 00:20:44,916 INFO L231 Difference]: Finished difference. Result has 62 places, 53 transitions, 300 flow [2024-06-28 00:20:44,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=300, PETRI_PLACES=62, PETRI_TRANSITIONS=53} [2024-06-28 00:20:44,917 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-28 00:20:44,917 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 53 transitions, 300 flow [2024-06-28 00:20:44,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:44,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:44,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:20:44,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:20:44,918 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:20:44,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:44,918 INFO L85 PathProgramCache]: Analyzing trace with hash 339715059, now seen corresponding path program 1 times [2024-06-28 00:20:44,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:44,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202152503] [2024-06-28 00:20:44,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:44,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:20:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:20:45,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:20:45,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202152503] [2024-06-28 00:20:45,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202152503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:20:45,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:20:45,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:20:45,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406602649] [2024-06-28 00:20:45,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:20:45,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:20:45,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:20:45,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:20:45,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:20:45,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:20:45,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 53 transitions, 300 flow. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:45,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:20:45,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:20:45,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:20:45,986 INFO L124 PetriNetUnfolderBase]: 804/1368 cut-off events. [2024-06-28 00:20:45,987 INFO L125 PetriNetUnfolderBase]: For 2080/2083 co-relation queries the response was YES. [2024-06-28 00:20:45,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4274 conditions, 1368 events. 804/1368 cut-off events. For 2080/2083 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7124 event pairs, 188 based on Foata normal form. 8/1371 useless extension candidates. Maximal degree in co-relation 4245. Up to 1060 conditions per place. [2024-06-28 00:20:45,995 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 72 selfloop transitions, 21 changer transitions 0/100 dead transitions. [2024-06-28 00:20:45,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 100 transitions, 679 flow [2024-06-28 00:20:45,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:20:45,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:20:45,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 00:20:45,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-28 00:20:45,996 INFO L175 Difference]: Start difference. First operand has 62 places, 53 transitions, 300 flow. Second operand 8 states and 155 transitions. [2024-06-28 00:20:45,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 100 transitions, 679 flow [2024-06-28 00:20:46,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 100 transitions, 638 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 00:20:46,002 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 425 flow [2024-06-28 00:20:46,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=425, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2024-06-28 00:20:46,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-28 00:20:46,003 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 425 flow [2024-06-28 00:20:46,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:46,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:46,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:20:46,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:20:46,004 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:20:46,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:46,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1261939089, now seen corresponding path program 2 times [2024-06-28 00:20:46,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:46,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193308067] [2024-06-28 00:20:46,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:46,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:20:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:20:46,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:20:46,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193308067] [2024-06-28 00:20:46,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193308067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:20:46,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:20:46,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:20:46,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732724035] [2024-06-28 00:20:46,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:20:46,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:20:46,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:20:46,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:20:46,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:20:46,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:20:46,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 425 flow. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:46,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:20:46,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:20:46,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:20:47,020 INFO L124 PetriNetUnfolderBase]: 868/1498 cut-off events. [2024-06-28 00:20:47,020 INFO L125 PetriNetUnfolderBase]: For 3762/3772 co-relation queries the response was YES. [2024-06-28 00:20:47,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5222 conditions, 1498 events. 868/1498 cut-off events. For 3762/3772 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8177 event pairs, 149 based on Foata normal form. 16/1500 useless extension candidates. Maximal degree in co-relation 5189. Up to 1090 conditions per place. [2024-06-28 00:20:47,034 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 62 selfloop transitions, 27 changer transitions 0/96 dead transitions. [2024-06-28 00:20:47,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 96 transitions, 722 flow [2024-06-28 00:20:47,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:20:47,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:20:47,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-28 00:20:47,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:20:47,036 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 425 flow. Second operand 7 states and 133 transitions. [2024-06-28 00:20:47,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 96 transitions, 722 flow [2024-06-28 00:20:47,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 96 transitions, 705 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-28 00:20:47,045 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 527 flow [2024-06-28 00:20:47,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=527, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2024-06-28 00:20:47,048 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-28 00:20:47,048 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 527 flow [2024-06-28 00:20:47,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:47,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:47,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:20:47,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:20:47,049 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:20:47,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:47,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1250988339, now seen corresponding path program 3 times [2024-06-28 00:20:47,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:47,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022581482] [2024-06-28 00:20:47,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:47,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:20:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:20:47,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:20:47,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022581482] [2024-06-28 00:20:47,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022581482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:20:47,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:20:47,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:20:47,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324235827] [2024-06-28 00:20:47,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:20:47,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:20:47,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:20:47,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:20:47,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:20:47,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:20:47,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 527 flow. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:47,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:20:47,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:20:47,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:20:48,013 INFO L124 PetriNetUnfolderBase]: 899/1533 cut-off events. [2024-06-28 00:20:48,013 INFO L125 PetriNetUnfolderBase]: For 5896/5905 co-relation queries the response was YES. [2024-06-28 00:20:48,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5873 conditions, 1533 events. 899/1533 cut-off events. For 5896/5905 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8364 event pairs, 178 based on Foata normal form. 7/1526 useless extension candidates. Maximal degree in co-relation 5837. Up to 1000 conditions per place. [2024-06-28 00:20:48,024 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 62 selfloop transitions, 32 changer transitions 0/101 dead transitions. [2024-06-28 00:20:48,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 101 transitions, 865 flow [2024-06-28 00:20:48,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:20:48,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:20:48,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-28 00:20:48,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-28 00:20:48,026 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 527 flow. Second operand 6 states and 124 transitions. [2024-06-28 00:20:48,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 101 transitions, 865 flow [2024-06-28 00:20:48,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 101 transitions, 807 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 00:20:48,040 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 589 flow [2024-06-28 00:20:48,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=589, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2024-06-28 00:20:48,042 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-28 00:20:48,042 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 589 flow [2024-06-28 00:20:48,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:48,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:48,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:20:48,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:20:48,043 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:20:48,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:48,043 INFO L85 PathProgramCache]: Analyzing trace with hash 680580865, now seen corresponding path program 4 times [2024-06-28 00:20:48,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:48,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587143097] [2024-06-28 00:20:48,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:48,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:20:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:20:48,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:20:48,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587143097] [2024-06-28 00:20:48,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587143097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:20:48,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:20:48,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:20:48,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038770199] [2024-06-28 00:20:48,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:20:48,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:20:48,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:20:48,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:20:48,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:20:48,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:20:48,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 589 flow. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:48,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:20:48,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:20:48,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:20:48,849 INFO L124 PetriNetUnfolderBase]: 853/1456 cut-off events. [2024-06-28 00:20:48,850 INFO L125 PetriNetUnfolderBase]: For 5449/5458 co-relation queries the response was YES. [2024-06-28 00:20:48,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5442 conditions, 1456 events. 853/1456 cut-off events. For 5449/5458 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7859 event pairs, 179 based on Foata normal form. 12/1452 useless extension candidates. Maximal degree in co-relation 5405. Up to 999 conditions per place. [2024-06-28 00:20:48,859 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 54 selfloop transitions, 30 changer transitions 0/91 dead transitions. [2024-06-28 00:20:48,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 91 transitions, 803 flow [2024-06-28 00:20:48,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:20:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:20:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-28 00:20:48,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-28 00:20:48,863 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 589 flow. Second operand 6 states and 113 transitions. [2024-06-28 00:20:48,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 91 transitions, 803 flow [2024-06-28 00:20:48,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 91 transitions, 779 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 00:20:48,871 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 669 flow [2024-06-28 00:20:48,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=669, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2024-06-28 00:20:48,873 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-28 00:20:48,873 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 669 flow [2024-06-28 00:20:48,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:48,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:48,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:20:48,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:20:48,874 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:20:48,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:48,874 INFO L85 PathProgramCache]: Analyzing trace with hash 354585200, now seen corresponding path program 1 times [2024-06-28 00:20:48,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:48,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175733634] [2024-06-28 00:20:48,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:48,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:20:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:20:49,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:20:49,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175733634] [2024-06-28 00:20:49,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175733634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:20:49,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:20:49,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:20:49,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404141568] [2024-06-28 00:20:49,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:20:49,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:20:49,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:20:49,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:20:49,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:20:49,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:20:49,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 669 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:49,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:20:49,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:20:49,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:20:49,883 INFO L124 PetriNetUnfolderBase]: 873/1512 cut-off events. [2024-06-28 00:20:49,884 INFO L125 PetriNetUnfolderBase]: For 6904/6917 co-relation queries the response was YES. [2024-06-28 00:20:49,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6060 conditions, 1512 events. 873/1512 cut-off events. For 6904/6917 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8220 event pairs, 122 based on Foata normal form. 14/1510 useless extension candidates. Maximal degree in co-relation 6019. Up to 1142 conditions per place. [2024-06-28 00:20:49,894 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 84 selfloop transitions, 19 changer transitions 0/110 dead transitions. [2024-06-28 00:20:49,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 110 transitions, 998 flow [2024-06-28 00:20:49,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:20:49,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:20:49,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 00:20:49,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 00:20:49,896 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 669 flow. Second operand 8 states and 146 transitions. [2024-06-28 00:20:49,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 110 transitions, 998 flow [2024-06-28 00:20:49,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 110 transitions, 922 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 00:20:49,906 INFO L231 Difference]: Finished difference. Result has 84 places, 81 transitions, 701 flow [2024-06-28 00:20:49,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=701, PETRI_PLACES=84, PETRI_TRANSITIONS=81} [2024-06-28 00:20:49,907 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-28 00:20:49,907 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 81 transitions, 701 flow [2024-06-28 00:20:49,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:49,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:49,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:20:49,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 00:20:49,908 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:20:49,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:49,908 INFO L85 PathProgramCache]: Analyzing trace with hash 125940050, now seen corresponding path program 2 times [2024-06-28 00:20:49,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:49,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513318639] [2024-06-28 00:20:49,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:49,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:20:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:20:50,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:20:50,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513318639] [2024-06-28 00:20:50,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513318639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:20:50,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:20:50,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:20:50,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11218926] [2024-06-28 00:20:50,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:20:50,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:20:50,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:20:50,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:20:50,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:20:50,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:20:50,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 81 transitions, 701 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:50,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:20:50,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:20:50,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:20:50,785 INFO L124 PetriNetUnfolderBase]: 893/1528 cut-off events. [2024-06-28 00:20:50,785 INFO L125 PetriNetUnfolderBase]: For 7200/7209 co-relation queries the response was YES. [2024-06-28 00:20:50,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6223 conditions, 1528 events. 893/1528 cut-off events. For 7200/7209 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8244 event pairs, 146 based on Foata normal form. 5/1517 useless extension candidates. Maximal degree in co-relation 6181. Up to 994 conditions per place. [2024-06-28 00:20:50,797 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 83 selfloop transitions, 29 changer transitions 0/119 dead transitions. [2024-06-28 00:20:50,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 119 transitions, 1097 flow [2024-06-28 00:20:50,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:20:50,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:20:50,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-28 00:20:50,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-28 00:20:50,799 INFO L175 Difference]: Start difference. First operand has 84 places, 81 transitions, 701 flow. Second operand 7 states and 140 transitions. [2024-06-28 00:20:50,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 119 transitions, 1097 flow [2024-06-28 00:20:50,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 119 transitions, 1067 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-28 00:20:50,811 INFO L231 Difference]: Finished difference. Result has 89 places, 88 transitions, 817 flow [2024-06-28 00:20:50,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=817, PETRI_PLACES=89, PETRI_TRANSITIONS=88} [2024-06-28 00:20:50,811 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-28 00:20:50,812 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 88 transitions, 817 flow [2024-06-28 00:20:50,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:50,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:50,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:20:50,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 00:20:50,812 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:20:50,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:50,813 INFO L85 PathProgramCache]: Analyzing trace with hash 125934470, now seen corresponding path program 3 times [2024-06-28 00:20:50,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:50,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41261678] [2024-06-28 00:20:50,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:50,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:20:51,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:20:51,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:20:51,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41261678] [2024-06-28 00:20:51,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41261678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:20:51,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:20:51,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:20:51,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688630617] [2024-06-28 00:20:51,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:20:51,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:20:51,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:20:51,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:20:51,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:20:51,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:20:51,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 88 transitions, 817 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:51,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:20:51,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:20:51,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:20:51,712 INFO L124 PetriNetUnfolderBase]: 913/1560 cut-off events. [2024-06-28 00:20:51,712 INFO L125 PetriNetUnfolderBase]: For 8699/8708 co-relation queries the response was YES. [2024-06-28 00:20:51,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6774 conditions, 1560 events. 913/1560 cut-off events. For 8699/8708 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8461 event pairs, 146 based on Foata normal form. 5/1549 useless extension candidates. Maximal degree in co-relation 6729. Up to 1134 conditions per place. [2024-06-28 00:20:51,722 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 88 selfloop transitions, 24 changer transitions 0/119 dead transitions. [2024-06-28 00:20:51,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 119 transitions, 1146 flow [2024-06-28 00:20:51,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:20:51,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:20:51,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-28 00:20:51,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-28 00:20:51,723 INFO L175 Difference]: Start difference. First operand has 89 places, 88 transitions, 817 flow. Second operand 7 states and 136 transitions. [2024-06-28 00:20:51,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 119 transitions, 1146 flow [2024-06-28 00:20:51,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 119 transitions, 1113 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-28 00:20:51,738 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 876 flow [2024-06-28 00:20:51,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=876, PETRI_PLACES=94, PETRI_TRANSITIONS=91} [2024-06-28 00:20:51,739 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-28 00:20:51,739 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 876 flow [2024-06-28 00:20:51,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:51,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:51,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:20:51,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 00:20:51,740 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:20:51,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:51,740 INFO L85 PathProgramCache]: Analyzing trace with hash -376828040, now seen corresponding path program 4 times [2024-06-28 00:20:51,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:51,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112072075] [2024-06-28 00:20:51,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:51,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:20:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:20:52,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:20:52,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112072075] [2024-06-28 00:20:52,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112072075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:20:52,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:20:52,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:20:52,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136536199] [2024-06-28 00:20:52,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:20:52,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:20:52,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:20:52,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:20:52,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:20:52,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:20:52,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 876 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:52,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:20:52,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:20:52,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:20:52,621 INFO L124 PetriNetUnfolderBase]: 923/1574 cut-off events. [2024-06-28 00:20:52,621 INFO L125 PetriNetUnfolderBase]: For 9672/9681 co-relation queries the response was YES. [2024-06-28 00:20:52,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7023 conditions, 1574 events. 923/1574 cut-off events. For 9672/9681 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8588 event pairs, 169 based on Foata normal form. 9/1561 useless extension candidates. Maximal degree in co-relation 6975. Up to 989 conditions per place. [2024-06-28 00:20:52,636 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 66 selfloop transitions, 43 changer transitions 0/116 dead transitions. [2024-06-28 00:20:52,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 116 transitions, 1176 flow [2024-06-28 00:20:52,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:20:52,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:20:52,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-28 00:20:52,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:20:52,638 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 876 flow. Second operand 7 states and 133 transitions. [2024-06-28 00:20:52,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 116 transitions, 1176 flow [2024-06-28 00:20:52,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 116 transitions, 1113 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 00:20:52,656 INFO L231 Difference]: Finished difference. Result has 97 places, 94 transitions, 953 flow [2024-06-28 00:20:52,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=953, PETRI_PLACES=97, PETRI_TRANSITIONS=94} [2024-06-28 00:20:52,657 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-28 00:20:52,657 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 94 transitions, 953 flow [2024-06-28 00:20:52,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:52,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:52,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:20:52,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 00:20:52,659 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:20:52,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:52,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1892759032, now seen corresponding path program 1 times [2024-06-28 00:20:52,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:52,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620724745] [2024-06-28 00:20:52,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:52,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:20:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:20:53,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:20:53,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620724745] [2024-06-28 00:20:53,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620724745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:20:53,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:20:53,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:20:53,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207058478] [2024-06-28 00:20:53,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:20:53,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:20:53,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:20:53,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:20:53,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:20:53,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:20:53,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 94 transitions, 953 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-28 00:20:53,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:20:53,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:20:53,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:20:54,012 INFO L124 PetriNetUnfolderBase]: 951/1666 cut-off events. [2024-06-28 00:20:54,012 INFO L125 PetriNetUnfolderBase]: For 10916/10933 co-relation queries the response was YES. [2024-06-28 00:20:54,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7528 conditions, 1666 events. 951/1666 cut-off events. For 10916/10933 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9430 event pairs, 134 based on Foata normal form. 22/1664 useless extension candidates. Maximal degree in co-relation 7479. Up to 1216 conditions per place. [2024-06-28 00:20:54,024 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 104 selfloop transitions, 20 changer transitions 0/131 dead transitions. [2024-06-28 00:20:54,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 131 transitions, 1299 flow [2024-06-28 00:20:54,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:20:54,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:20:54,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 00:20:54,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-28 00:20:54,026 INFO L175 Difference]: Start difference. First operand has 97 places, 94 transitions, 953 flow. Second operand 9 states and 164 transitions. [2024-06-28 00:20:54,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 131 transitions, 1299 flow [2024-06-28 00:20:54,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 131 transitions, 1201 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 00:20:54,049 INFO L231 Difference]: Finished difference. Result has 101 places, 95 transitions, 911 flow [2024-06-28 00:20:54,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=911, PETRI_PLACES=101, PETRI_TRANSITIONS=95} [2024-06-28 00:20:54,050 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-28 00:20:54,050 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 95 transitions, 911 flow [2024-06-28 00:20:54,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-28 00:20:54,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:54,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:20:54,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 00:20:54,050 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:20:54,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:54,051 INFO L85 PathProgramCache]: Analyzing trace with hash -390817580, now seen corresponding path program 2 times [2024-06-28 00:20:54,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:54,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115759199] [2024-06-28 00:20:54,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:54,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:20:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:20:55,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:20:55,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115759199] [2024-06-28 00:20:55,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115759199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:20:55,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:20:55,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:20:55,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949932321] [2024-06-28 00:20:55,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:20:55,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:20:55,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:20:55,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:20:55,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:20:55,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:20:55,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 95 transitions, 911 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-28 00:20:55,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:20:55,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:20:55,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:20:55,637 INFO L124 PetriNetUnfolderBase]: 1062/1869 cut-off events. [2024-06-28 00:20:55,638 INFO L125 PetriNetUnfolderBase]: For 11110/11119 co-relation queries the response was YES. [2024-06-28 00:20:55,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8033 conditions, 1869 events. 1062/1869 cut-off events. For 11110/11119 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11022 event pairs, 115 based on Foata normal form. 15/1868 useless extension candidates. Maximal degree in co-relation 7983. Up to 779 conditions per place. [2024-06-28 00:20:55,651 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 77 selfloop transitions, 60 changer transitions 0/144 dead transitions. [2024-06-28 00:20:55,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 144 transitions, 1407 flow [2024-06-28 00:20:55,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:20:55,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:20:55,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-28 00:20:55,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-28 00:20:55,652 INFO L175 Difference]: Start difference. First operand has 101 places, 95 transitions, 911 flow. Second operand 9 states and 180 transitions. [2024-06-28 00:20:55,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 144 transitions, 1407 flow [2024-06-28 00:20:55,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 144 transitions, 1361 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 00:20:55,673 INFO L231 Difference]: Finished difference. Result has 105 places, 103 transitions, 1099 flow [2024-06-28 00:20:55,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1099, PETRI_PLACES=105, PETRI_TRANSITIONS=103} [2024-06-28 00:20:55,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-28 00:20:55,674 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 103 transitions, 1099 flow [2024-06-28 00:20:55,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-28 00:20:55,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:55,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:20:55,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 00:20:55,675 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:20:55,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:55,676 INFO L85 PathProgramCache]: Analyzing trace with hash -390997070, now seen corresponding path program 3 times [2024-06-28 00:20:55,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:55,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008173762] [2024-06-28 00:20:55,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:55,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:20:56,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:20:56,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:20:56,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008173762] [2024-06-28 00:20:56,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008173762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:20:56,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:20:56,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:20:56,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699972611] [2024-06-28 00:20:56,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:20:56,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:20:56,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:20:56,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:20:56,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:20:56,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:20:56,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 103 transitions, 1099 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-28 00:20:56,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:20:56,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:20:56,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:20:56,848 INFO L124 PetriNetUnfolderBase]: 1090/1931 cut-off events. [2024-06-28 00:20:56,848 INFO L125 PetriNetUnfolderBase]: For 14015/14024 co-relation queries the response was YES. [2024-06-28 00:20:56,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8874 conditions, 1931 events. 1090/1931 cut-off events. For 14015/14024 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11581 event pairs, 167 based on Foata normal form. 9/1924 useless extension candidates. Maximal degree in co-relation 8821. Up to 1377 conditions per place. [2024-06-28 00:20:56,860 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 107 selfloop transitions, 25 changer transitions 0/139 dead transitions. [2024-06-28 00:20:56,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 139 transitions, 1464 flow [2024-06-28 00:20:56,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:20:56,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:20:56,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-28 00:20:56,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-28 00:20:56,862 INFO L175 Difference]: Start difference. First operand has 105 places, 103 transitions, 1099 flow. Second operand 8 states and 154 transitions. [2024-06-28 00:20:56,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 139 transitions, 1464 flow [2024-06-28 00:20:56,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 139 transitions, 1367 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-28 00:20:56,895 INFO L231 Difference]: Finished difference. Result has 110 places, 104 transitions, 1073 flow [2024-06-28 00:20:56,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1073, PETRI_PLACES=110, PETRI_TRANSITIONS=104} [2024-06-28 00:20:56,896 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-28 00:20:56,896 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 104 transitions, 1073 flow [2024-06-28 00:20:56,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-28 00:20:56,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:56,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:20:56,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 00:20:56,897 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:20:56,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:56,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1203234304, now seen corresponding path program 4 times [2024-06-28 00:20:56,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:56,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393471791] [2024-06-28 00:20:56,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:56,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:20:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:20:57,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:20:57,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393471791] [2024-06-28 00:20:57,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393471791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:20:57,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:20:57,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:20:57,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675697430] [2024-06-28 00:20:57,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:20:57,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:20:57,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:20:57,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:20:57,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:20:57,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:20:57,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 104 transitions, 1073 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:57,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:20:57,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:20:57,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:20:58,425 INFO L124 PetriNetUnfolderBase]: 1196/2131 cut-off events. [2024-06-28 00:20:58,425 INFO L125 PetriNetUnfolderBase]: For 14727/14735 co-relation queries the response was YES. [2024-06-28 00:20:58,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9802 conditions, 2131 events. 1196/2131 cut-off events. For 14727/14735 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 13361 event pairs, 179 based on Foata normal form. 16/2132 useless extension candidates. Maximal degree in co-relation 9747. Up to 1465 conditions per place. [2024-06-28 00:20:58,439 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 132 selfloop transitions, 40 changer transitions 0/179 dead transitions. [2024-06-28 00:20:58,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 179 transitions, 1777 flow [2024-06-28 00:20:58,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:20:58,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:20:58,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 226 transitions. [2024-06-28 00:20:58,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-28 00:20:58,441 INFO L175 Difference]: Start difference. First operand has 110 places, 104 transitions, 1073 flow. Second operand 12 states and 226 transitions. [2024-06-28 00:20:58,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 179 transitions, 1777 flow [2024-06-28 00:20:58,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 179 transitions, 1694 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 00:20:58,481 INFO L231 Difference]: Finished difference. Result has 118 places, 121 transitions, 1325 flow [2024-06-28 00:20:58,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1325, PETRI_PLACES=118, PETRI_TRANSITIONS=121} [2024-06-28 00:20:58,482 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-28 00:20:58,482 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 121 transitions, 1325 flow [2024-06-28 00:20:58,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:58,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:58,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:20:58,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 00:20:58,483 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:20:58,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:58,483 INFO L85 PathProgramCache]: Analyzing trace with hash -905329356, now seen corresponding path program 1 times [2024-06-28 00:20:58,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:58,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629951607] [2024-06-28 00:20:58,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:58,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:20:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:20:59,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:20:59,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629951607] [2024-06-28 00:20:59,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629951607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:20:59,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:20:59,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:20:59,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77181150] [2024-06-28 00:20:59,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:20:59,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:20:59,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:20:59,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:20:59,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:20:59,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:20:59,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 121 transitions, 1325 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:59,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:20:59,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:20:59,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:20:59,912 INFO L124 PetriNetUnfolderBase]: 1129/1991 cut-off events. [2024-06-28 00:20:59,912 INFO L125 PetriNetUnfolderBase]: For 15711/15723 co-relation queries the response was YES. [2024-06-28 00:20:59,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9531 conditions, 1991 events. 1129/1991 cut-off events. For 15711/15723 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12544 event pairs, 574 based on Foata normal form. 11/1980 useless extension candidates. Maximal degree in co-relation 9472. Up to 1726 conditions per place. [2024-06-28 00:20:59,924 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 107 selfloop transitions, 12 changer transitions 0/138 dead transitions. [2024-06-28 00:20:59,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 138 transitions, 1647 flow [2024-06-28 00:20:59,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:20:59,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:20:59,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-28 00:20:59,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 00:20:59,926 INFO L175 Difference]: Start difference. First operand has 118 places, 121 transitions, 1325 flow. Second operand 6 states and 112 transitions. [2024-06-28 00:20:59,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 138 transitions, 1647 flow [2024-06-28 00:20:59,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 138 transitions, 1580 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 00:20:59,965 INFO L231 Difference]: Finished difference. Result has 122 places, 126 transitions, 1358 flow [2024-06-28 00:20:59,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1358, PETRI_PLACES=122, PETRI_TRANSITIONS=126} [2024-06-28 00:20:59,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-28 00:20:59,966 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 126 transitions, 1358 flow [2024-06-28 00:20:59,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:59,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:59,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:20:59,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 00:20:59,966 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:20:59,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:59,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1526859277, now seen corresponding path program 1 times [2024-06-28 00:20:59,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:59,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043918698] [2024-06-28 00:20:59,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:59,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:00,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:00,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043918698] [2024-06-28 00:21:00,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043918698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:00,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:00,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:21:00,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24683140] [2024-06-28 00:21:00,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:00,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:21:00,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:00,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:21:00,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:21:00,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:21:00,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 126 transitions, 1358 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:00,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:00,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:21:00,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:01,470 INFO L124 PetriNetUnfolderBase]: 1143/2036 cut-off events. [2024-06-28 00:21:01,470 INFO L125 PetriNetUnfolderBase]: For 16270/16276 co-relation queries the response was YES. [2024-06-28 00:21:01,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9614 conditions, 2036 events. 1143/2036 cut-off events. For 16270/16276 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 12729 event pairs, 163 based on Foata normal form. 10/2009 useless extension candidates. Maximal degree in co-relation 9551. Up to 1553 conditions per place. [2024-06-28 00:21:01,484 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 88 selfloop transitions, 33 changer transitions 0/140 dead transitions. [2024-06-28 00:21:01,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 140 transitions, 1640 flow [2024-06-28 00:21:01,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:21:01,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:21:01,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-28 00:21:01,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-28 00:21:01,490 INFO L175 Difference]: Start difference. First operand has 122 places, 126 transitions, 1358 flow. Second operand 7 states and 123 transitions. [2024-06-28 00:21:01,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 140 transitions, 1640 flow [2024-06-28 00:21:01,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 140 transitions, 1617 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-28 00:21:01,527 INFO L231 Difference]: Finished difference. Result has 127 places, 127 transitions, 1422 flow [2024-06-28 00:21:01,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1422, PETRI_PLACES=127, PETRI_TRANSITIONS=127} [2024-06-28 00:21:01,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-28 00:21:01,528 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 127 transitions, 1422 flow [2024-06-28 00:21:01,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:01,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:01,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:21:01,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 00:21:01,529 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:01,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:01,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1851529773, now seen corresponding path program 2 times [2024-06-28 00:21:01,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:01,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400742554] [2024-06-28 00:21:01,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:01,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:02,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:02,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400742554] [2024-06-28 00:21:02,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400742554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:02,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:02,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:21:02,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604273510] [2024-06-28 00:21:02,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:02,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:21:02,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:02,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:21:02,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:21:02,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:21:02,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 127 transitions, 1422 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:02,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:02,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:21:02,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:03,342 INFO L124 PetriNetUnfolderBase]: 1122/2009 cut-off events. [2024-06-28 00:21:03,343 INFO L125 PetriNetUnfolderBase]: For 17174/17180 co-relation queries the response was YES. [2024-06-28 00:21:03,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9625 conditions, 2009 events. 1122/2009 cut-off events. For 17174/17180 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12582 event pairs, 164 based on Foata normal form. 10/1986 useless extension candidates. Maximal degree in co-relation 9560. Up to 1500 conditions per place. [2024-06-28 00:21:03,357 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 91 selfloop transitions, 34 changer transitions 0/144 dead transitions. [2024-06-28 00:21:03,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 144 transitions, 1712 flow [2024-06-28 00:21:03,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:21:03,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:21:03,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 00:21:03,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-28 00:21:03,359 INFO L175 Difference]: Start difference. First operand has 127 places, 127 transitions, 1422 flow. Second operand 8 states and 138 transitions. [2024-06-28 00:21:03,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 144 transitions, 1712 flow [2024-06-28 00:21:03,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 144 transitions, 1654 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 00:21:03,403 INFO L231 Difference]: Finished difference. Result has 131 places, 127 transitions, 1436 flow [2024-06-28 00:21:03,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1436, PETRI_PLACES=131, PETRI_TRANSITIONS=127} [2024-06-28 00:21:03,404 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-28 00:21:03,404 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 127 transitions, 1436 flow [2024-06-28 00:21:03,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:03,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:03,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:21:03,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 00:21:03,405 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:03,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:03,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1679398713, now seen corresponding path program 1 times [2024-06-28 00:21:03,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:03,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907839959] [2024-06-28 00:21:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:03,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:04,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:04,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907839959] [2024-06-28 00:21:04,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907839959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:04,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:04,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:21:04,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63162344] [2024-06-28 00:21:04,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:04,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:21:04,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:04,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:21:04,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:21:04,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:21:04,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 127 transitions, 1436 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:04,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:04,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:21:04,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:04,899 INFO L124 PetriNetUnfolderBase]: 1122/2051 cut-off events. [2024-06-28 00:21:04,899 INFO L125 PetriNetUnfolderBase]: For 18484/18505 co-relation queries the response was YES. [2024-06-28 00:21:04,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9778 conditions, 2051 events. 1122/2051 cut-off events. For 18484/18505 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13091 event pairs, 389 based on Foata normal form. 20/2051 useless extension candidates. Maximal degree in co-relation 9713. Up to 1687 conditions per place. [2024-06-28 00:21:04,914 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 109 selfloop transitions, 29 changer transitions 0/151 dead transitions. [2024-06-28 00:21:04,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 151 transitions, 1817 flow [2024-06-28 00:21:04,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:21:04,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:21:04,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-28 00:21:04,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-28 00:21:04,915 INFO L175 Difference]: Start difference. First operand has 131 places, 127 transitions, 1436 flow. Second operand 6 states and 130 transitions. [2024-06-28 00:21:04,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 151 transitions, 1817 flow [2024-06-28 00:21:04,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 151 transitions, 1743 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 00:21:04,958 INFO L231 Difference]: Finished difference. Result has 132 places, 132 transitions, 1491 flow [2024-06-28 00:21:04,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1362, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1491, PETRI_PLACES=132, PETRI_TRANSITIONS=132} [2024-06-28 00:21:04,959 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-28 00:21:04,959 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 132 transitions, 1491 flow [2024-06-28 00:21:04,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:04,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:04,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:21:04,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 00:21:04,960 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:04,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:04,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1920428239, now seen corresponding path program 1 times [2024-06-28 00:21:04,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:04,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44368860] [2024-06-28 00:21:04,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:04,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:05,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:05,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44368860] [2024-06-28 00:21:05,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44368860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:05,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:05,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:21:05,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507706051] [2024-06-28 00:21:05,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:05,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:21:05,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:05,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:21:05,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:21:05,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:21:05,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 132 transitions, 1491 flow. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:05,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:05,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:21:05,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:06,505 INFO L124 PetriNetUnfolderBase]: 1212/2150 cut-off events. [2024-06-28 00:21:06,505 INFO L125 PetriNetUnfolderBase]: For 20286/20286 co-relation queries the response was YES. [2024-06-28 00:21:06,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10422 conditions, 2150 events. 1212/2150 cut-off events. For 20286/20286 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 13573 event pairs, 601 based on Foata normal form. 3/2140 useless extension candidates. Maximal degree in co-relation 10355. Up to 1857 conditions per place. [2024-06-28 00:21:06,518 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 138 selfloop transitions, 20 changer transitions 0/165 dead transitions. [2024-06-28 00:21:06,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 165 transitions, 2023 flow [2024-06-28 00:21:06,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:21:06,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:21:06,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-28 00:21:06,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-28 00:21:06,520 INFO L175 Difference]: Start difference. First operand has 132 places, 132 transitions, 1491 flow. Second operand 7 states and 132 transitions. [2024-06-28 00:21:06,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 165 transitions, 2023 flow [2024-06-28 00:21:06,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 165 transitions, 1940 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-28 00:21:06,564 INFO L231 Difference]: Finished difference. Result has 138 places, 142 transitions, 1592 flow [2024-06-28 00:21:06,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1415, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1592, PETRI_PLACES=138, PETRI_TRANSITIONS=142} [2024-06-28 00:21:06,564 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-28 00:21:06,565 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 142 transitions, 1592 flow [2024-06-28 00:21:06,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:06,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:06,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:21:06,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 00:21:06,565 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:06,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:06,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1169209741, now seen corresponding path program 2 times [2024-06-28 00:21:06,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:06,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606616923] [2024-06-28 00:21:06,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:06,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:06,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:07,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:07,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:07,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606616923] [2024-06-28 00:21:07,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606616923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:07,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:07,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:21:07,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990780927] [2024-06-28 00:21:07,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:07,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:21:07,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:07,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:21:07,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:21:07,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:21:07,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 142 transitions, 1592 flow. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:07,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:07,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:21:07,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:07,997 INFO L124 PetriNetUnfolderBase]: 1225/2172 cut-off events. [2024-06-28 00:21:07,998 INFO L125 PetriNetUnfolderBase]: For 21820/21824 co-relation queries the response was YES. [2024-06-28 00:21:08,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10660 conditions, 2172 events. 1225/2172 cut-off events. For 21820/21824 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 13714 event pairs, 600 based on Foata normal form. 7/2166 useless extension candidates. Maximal degree in co-relation 10589. Up to 1869 conditions per place. [2024-06-28 00:21:08,012 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 134 selfloop transitions, 23 changer transitions 0/164 dead transitions. [2024-06-28 00:21:08,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 164 transitions, 2032 flow [2024-06-28 00:21:08,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:21:08,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:21:08,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-28 00:21:08,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-28 00:21:08,013 INFO L175 Difference]: Start difference. First operand has 138 places, 142 transitions, 1592 flow. Second operand 7 states and 128 transitions. [2024-06-28 00:21:08,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 164 transitions, 2032 flow [2024-06-28 00:21:08,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 164 transitions, 1996 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-28 00:21:08,063 INFO L231 Difference]: Finished difference. Result has 144 places, 146 transitions, 1659 flow [2024-06-28 00:21:08,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1564, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1659, PETRI_PLACES=144, PETRI_TRANSITIONS=146} [2024-06-28 00:21:08,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-28 00:21:08,063 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 146 transitions, 1659 flow [2024-06-28 00:21:08,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:08,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:08,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:21:08,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 00:21:08,064 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:08,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:08,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1851535725, now seen corresponding path program 3 times [2024-06-28 00:21:08,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:08,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52404383] [2024-06-28 00:21:08,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:08,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:08,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:08,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52404383] [2024-06-28 00:21:08,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52404383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:08,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:08,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:21:08,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310659320] [2024-06-28 00:21:08,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:08,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:21:08,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:08,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:21:08,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:21:08,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:21:08,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 146 transitions, 1659 flow. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:08,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:08,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:21:08,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:09,466 INFO L124 PetriNetUnfolderBase]: 1217/2161 cut-off events. [2024-06-28 00:21:09,466 INFO L125 PetriNetUnfolderBase]: For 22460/22464 co-relation queries the response was YES. [2024-06-28 00:21:09,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10595 conditions, 2161 events. 1217/2161 cut-off events. For 22460/22464 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 13593 event pairs, 600 based on Foata normal form. 7/2155 useless extension candidates. Maximal degree in co-relation 10521. Up to 1863 conditions per place. [2024-06-28 00:21:09,480 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 130 selfloop transitions, 25 changer transitions 0/162 dead transitions. [2024-06-28 00:21:09,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 162 transitions, 2017 flow [2024-06-28 00:21:09,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:21:09,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:21:09,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-28 00:21:09,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-28 00:21:09,481 INFO L175 Difference]: Start difference. First operand has 144 places, 146 transitions, 1659 flow. Second operand 7 states and 125 transitions. [2024-06-28 00:21:09,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 162 transitions, 2017 flow [2024-06-28 00:21:09,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 162 transitions, 1977 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-28 00:21:09,532 INFO L231 Difference]: Finished difference. Result has 149 places, 147 transitions, 1686 flow [2024-06-28 00:21:09,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1622, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1686, PETRI_PLACES=149, PETRI_TRANSITIONS=147} [2024-06-28 00:21:09,532 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-28 00:21:09,532 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 147 transitions, 1686 flow [2024-06-28 00:21:09,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:09,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:09,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:21:09,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 00:21:09,533 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:09,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:09,533 INFO L85 PathProgramCache]: Analyzing trace with hash 2110215641, now seen corresponding path program 1 times [2024-06-28 00:21:09,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:09,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004886721] [2024-06-28 00:21:09,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:09,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:10,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:10,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004886721] [2024-06-28 00:21:10,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004886721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:10,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:10,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:21:10,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258735843] [2024-06-28 00:21:10,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:10,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:21:10,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:10,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:21:10,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:21:10,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:21:10,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 147 transitions, 1686 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 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) [2024-06-28 00:21:10,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:10,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:21:10,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:11,031 INFO L124 PetriNetUnfolderBase]: 1165/2121 cut-off events. [2024-06-28 00:21:11,032 INFO L125 PetriNetUnfolderBase]: For 23487/23508 co-relation queries the response was YES. [2024-06-28 00:21:11,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10347 conditions, 2121 events. 1165/2121 cut-off events. For 23487/23508 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 13618 event pairs, 389 based on Foata normal form. 22/2123 useless extension candidates. Maximal degree in co-relation 10271. Up to 1655 conditions per place. [2024-06-28 00:21:11,047 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 121 selfloop transitions, 37 changer transitions 0/177 dead transitions. [2024-06-28 00:21:11,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 177 transitions, 2159 flow [2024-06-28 00:21:11,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:21:11,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:21:11,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-28 00:21:11,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170068027210885 [2024-06-28 00:21:11,050 INFO L175 Difference]: Start difference. First operand has 149 places, 147 transitions, 1686 flow. Second operand 7 states and 152 transitions. [2024-06-28 00:21:11,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 177 transitions, 2159 flow [2024-06-28 00:21:11,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 177 transitions, 2127 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 00:21:11,114 INFO L231 Difference]: Finished difference. Result has 154 places, 150 transitions, 1780 flow [2024-06-28 00:21:11,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1654, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1780, PETRI_PLACES=154, PETRI_TRANSITIONS=150} [2024-06-28 00:21:11,115 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-28 00:21:11,115 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 150 transitions, 1780 flow [2024-06-28 00:21:11,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 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) [2024-06-28 00:21:11,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:11,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:21:11,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 00:21:11,116 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:11,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:11,116 INFO L85 PathProgramCache]: Analyzing trace with hash -599990305, now seen corresponding path program 2 times [2024-06-28 00:21:11,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:11,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752232121] [2024-06-28 00:21:11,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:11,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:12,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:12,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752232121] [2024-06-28 00:21:12,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752232121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:12,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:12,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:21:12,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824873636] [2024-06-28 00:21:12,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:12,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:21:12,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:12,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:21:12,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:21:12,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:21:12,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 150 transitions, 1780 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 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) [2024-06-28 00:21:12,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:12,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:21:12,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:12,693 INFO L124 PetriNetUnfolderBase]: 1155/2113 cut-off events. [2024-06-28 00:21:12,693 INFO L125 PetriNetUnfolderBase]: For 24786/24807 co-relation queries the response was YES. [2024-06-28 00:21:12,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10505 conditions, 2113 events. 1155/2113 cut-off events. For 24786/24807 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 13598 event pairs, 427 based on Foata normal form. 22/2115 useless extension candidates. Maximal degree in co-relation 10428. Up to 1703 conditions per place. [2024-06-28 00:21:12,709 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 118 selfloop transitions, 36 changer transitions 0/173 dead transitions. [2024-06-28 00:21:12,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 173 transitions, 2180 flow [2024-06-28 00:21:12,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:21:12,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:21:12,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-28 00:21:12,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2024-06-28 00:21:12,711 INFO L175 Difference]: Start difference. First operand has 154 places, 150 transitions, 1780 flow. Second operand 7 states and 146 transitions. [2024-06-28 00:21:12,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 173 transitions, 2180 flow [2024-06-28 00:21:12,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 173 transitions, 2093 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-28 00:21:12,773 INFO L231 Difference]: Finished difference. Result has 157 places, 152 transitions, 1804 flow [2024-06-28 00:21:12,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1693, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1804, PETRI_PLACES=157, PETRI_TRANSITIONS=152} [2024-06-28 00:21:12,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-28 00:21:12,774 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 152 transitions, 1804 flow [2024-06-28 00:21:12,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 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) [2024-06-28 00:21:12,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:12,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:21:12,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 00:21:12,775 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:12,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:12,776 INFO L85 PathProgramCache]: Analyzing trace with hash 521753972, now seen corresponding path program 1 times [2024-06-28 00:21:12,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:12,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351252573] [2024-06-28 00:21:12,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:12,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:12,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:13,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:13,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351252573] [2024-06-28 00:21:13,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351252573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:13,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:13,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:21:13,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823375106] [2024-06-28 00:21:13,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:13,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:21:13,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:13,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:21:13,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:21:13,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:21:13,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 152 transitions, 1804 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:13,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:13,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:21:13,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:14,187 INFO L124 PetriNetUnfolderBase]: 1241/2203 cut-off events. [2024-06-28 00:21:14,187 INFO L125 PetriNetUnfolderBase]: For 27254/27254 co-relation queries the response was YES. [2024-06-28 00:21:14,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11121 conditions, 2203 events. 1241/2203 cut-off events. For 27254/27254 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 13943 event pairs, 602 based on Foata normal form. 1/2190 useless extension candidates. Maximal degree in co-relation 11042. Up to 1885 conditions per place. [2024-06-28 00:21:14,203 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 156 selfloop transitions, 34 changer transitions 0/197 dead transitions. [2024-06-28 00:21:14,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 197 transitions, 2498 flow [2024-06-28 00:21:14,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:21:14,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:21:14,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 00:21:14,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-28 00:21:14,204 INFO L175 Difference]: Start difference. First operand has 157 places, 152 transitions, 1804 flow. Second operand 8 states and 149 transitions. [2024-06-28 00:21:14,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 197 transitions, 2498 flow [2024-06-28 00:21:14,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 197 transitions, 2392 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 00:21:14,263 INFO L231 Difference]: Finished difference. Result has 164 places, 174 transitions, 2042 flow [2024-06-28 00:21:14,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2042, PETRI_PLACES=164, PETRI_TRANSITIONS=174} [2024-06-28 00:21:14,264 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-28 00:21:14,264 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 174 transitions, 2042 flow [2024-06-28 00:21:14,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:14,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:14,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:21:14,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 00:21:14,264 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:14,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:14,265 INFO L85 PathProgramCache]: Analyzing trace with hash 525478622, now seen corresponding path program 2 times [2024-06-28 00:21:14,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:14,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257001170] [2024-06-28 00:21:14,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:14,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:15,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:15,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257001170] [2024-06-28 00:21:15,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257001170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:15,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:15,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:21:15,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006049404] [2024-06-28 00:21:15,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:15,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:21:15,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:15,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:21:15,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:21:15,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:21:15,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 174 transitions, 2042 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:15,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:15,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:21:15,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:15,600 INFO L124 PetriNetUnfolderBase]: 1246/2204 cut-off events. [2024-06-28 00:21:15,600 INFO L125 PetriNetUnfolderBase]: For 28706/28706 co-relation queries the response was YES. [2024-06-28 00:21:15,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11422 conditions, 2204 events. 1246/2204 cut-off events. For 28706/28706 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13845 event pairs, 595 based on Foata normal form. 1/2189 useless extension candidates. Maximal degree in co-relation 11337. Up to 1903 conditions per place. [2024-06-28 00:21:15,616 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 153 selfloop transitions, 36 changer transitions 0/196 dead transitions. [2024-06-28 00:21:15,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 196 transitions, 2501 flow [2024-06-28 00:21:15,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:21:15,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:21:15,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 00:21:15,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 00:21:15,617 INFO L175 Difference]: Start difference. First operand has 164 places, 174 transitions, 2042 flow. Second operand 8 states and 144 transitions. [2024-06-28 00:21:15,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 196 transitions, 2501 flow [2024-06-28 00:21:15,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 196 transitions, 2471 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-28 00:21:15,692 INFO L231 Difference]: Finished difference. Result has 172 places, 178 transitions, 2133 flow [2024-06-28 00:21:15,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2016, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2133, PETRI_PLACES=172, PETRI_TRANSITIONS=178} [2024-06-28 00:21:15,692 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-28 00:21:15,693 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 178 transitions, 2133 flow [2024-06-28 00:21:15,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:15,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:15,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:21:15,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 00:21:15,693 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:15,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:15,693 INFO L85 PathProgramCache]: Analyzing trace with hash -596271080, now seen corresponding path program 3 times [2024-06-28 00:21:15,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:15,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917980519] [2024-06-28 00:21:15,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:15,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:16,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:16,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917980519] [2024-06-28 00:21:16,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917980519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:16,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:16,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:21:16,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969032396] [2024-06-28 00:21:16,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:16,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:21:16,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:16,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:21:16,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:21:16,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:21:16,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 178 transitions, 2133 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:16,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:16,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:21:16,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:16,828 INFO L124 PetriNetUnfolderBase]: 1256/2216 cut-off events. [2024-06-28 00:21:16,828 INFO L125 PetriNetUnfolderBase]: For 30533/30533 co-relation queries the response was YES. [2024-06-28 00:21:16,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11657 conditions, 2216 events. 1256/2216 cut-off events. For 30533/30533 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 13940 event pairs, 599 based on Foata normal form. 1/2199 useless extension candidates. Maximal degree in co-relation 11568. Up to 1954 conditions per place. [2024-06-28 00:21:16,843 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 169 selfloop transitions, 24 changer transitions 0/200 dead transitions. [2024-06-28 00:21:16,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 200 transitions, 2628 flow [2024-06-28 00:21:16,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:21:16,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:21:16,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 00:21:16,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 00:21:16,844 INFO L175 Difference]: Start difference. First operand has 172 places, 178 transitions, 2133 flow. Second operand 8 states and 140 transitions. [2024-06-28 00:21:16,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 200 transitions, 2628 flow [2024-06-28 00:21:16,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 200 transitions, 2572 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 00:21:16,921 INFO L231 Difference]: Finished difference. Result has 177 places, 184 transitions, 2212 flow [2024-06-28 00:21:16,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2077, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2212, PETRI_PLACES=177, PETRI_TRANSITIONS=184} [2024-06-28 00:21:16,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-28 00:21:16,922 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 184 transitions, 2212 flow [2024-06-28 00:21:16,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:16,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:16,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:21:16,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:21:16,923 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:16,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:16,923 INFO L85 PathProgramCache]: Analyzing trace with hash 525472887, now seen corresponding path program 3 times [2024-06-28 00:21:16,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:16,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791267310] [2024-06-28 00:21:16,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:16,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:17,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:17,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791267310] [2024-06-28 00:21:17,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791267310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:17,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:17,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:21:17,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979346209] [2024-06-28 00:21:17,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:17,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:21:17,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:17,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:21:17,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:21:17,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:21:17,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 184 transitions, 2212 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 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) [2024-06-28 00:21:17,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:17,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:21:17,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:18,115 INFO L124 PetriNetUnfolderBase]: 1251/2238 cut-off events. [2024-06-28 00:21:18,115 INFO L125 PetriNetUnfolderBase]: For 32876/32899 co-relation queries the response was YES. [2024-06-28 00:21:18,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11704 conditions, 2238 events. 1251/2238 cut-off events. For 32876/32899 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 14211 event pairs, 414 based on Foata normal form. 22/2240 useless extension candidates. Maximal degree in co-relation 11614. Up to 1828 conditions per place. [2024-06-28 00:21:18,134 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 154 selfloop transitions, 33 changer transitions 0/216 dead transitions. [2024-06-28 00:21:18,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 216 transitions, 2835 flow [2024-06-28 00:21:18,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:21:18,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:21:18,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-28 00:21:18,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-28 00:21:18,135 INFO L175 Difference]: Start difference. First operand has 177 places, 184 transitions, 2212 flow. Second operand 7 states and 143 transitions. [2024-06-28 00:21:18,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 216 transitions, 2835 flow [2024-06-28 00:21:18,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 216 transitions, 2775 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 00:21:18,216 INFO L231 Difference]: Finished difference. Result has 181 places, 197 transitions, 2419 flow [2024-06-28 00:21:18,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2152, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2419, PETRI_PLACES=181, PETRI_TRANSITIONS=197} [2024-06-28 00:21:18,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-28 00:21:18,216 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 197 transitions, 2419 flow [2024-06-28 00:21:18,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 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) [2024-06-28 00:21:18,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:18,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:21:18,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:21:18,217 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:18,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:18,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1563033862, now seen corresponding path program 4 times [2024-06-28 00:21:18,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:18,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838671316] [2024-06-28 00:21:18,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:18,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:18,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:18,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838671316] [2024-06-28 00:21:18,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838671316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:18,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:18,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:21:18,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970646711] [2024-06-28 00:21:18,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:18,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:21:18,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:18,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:21:18,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:21:18,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:21:18,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 197 transitions, 2419 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:18,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:18,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:21:18,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:19,331 INFO L124 PetriNetUnfolderBase]: 1303/2293 cut-off events. [2024-06-28 00:21:19,331 INFO L125 PetriNetUnfolderBase]: For 35519/35525 co-relation queries the response was YES. [2024-06-28 00:21:19,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12524 conditions, 2293 events. 1303/2293 cut-off events. For 35519/35525 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14469 event pairs, 609 based on Foata normal form. 7/2284 useless extension candidates. Maximal degree in co-relation 12430. Up to 2013 conditions per place. [2024-06-28 00:21:19,349 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 174 selfloop transitions, 32 changer transitions 0/213 dead transitions. [2024-06-28 00:21:19,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 213 transitions, 2904 flow [2024-06-28 00:21:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:21:19,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:21:19,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-28 00:21:19,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-28 00:21:19,351 INFO L175 Difference]: Start difference. First operand has 181 places, 197 transitions, 2419 flow. Second operand 9 states and 147 transitions. [2024-06-28 00:21:19,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 213 transitions, 2904 flow [2024-06-28 00:21:19,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 213 transitions, 2814 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 00:21:19,438 INFO L231 Difference]: Finished difference. Result has 186 places, 201 transitions, 2446 flow [2024-06-28 00:21:19,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2329, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2446, PETRI_PLACES=186, PETRI_TRANSITIONS=201} [2024-06-28 00:21:19,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-28 00:21:19,439 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 201 transitions, 2446 flow [2024-06-28 00:21:19,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:19,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:19,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:21:19,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 00:21:19,439 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:19,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:19,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1555676632, now seen corresponding path program 5 times [2024-06-28 00:21:19,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:19,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168729052] [2024-06-28 00:21:19,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:19,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:20,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:20,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168729052] [2024-06-28 00:21:20,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168729052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:20,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:20,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:21:20,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789354833] [2024-06-28 00:21:20,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:20,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:21:20,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:20,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:21:20,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:21:20,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:21:20,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 201 transitions, 2446 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:20,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:20,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:21:20,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:20,542 INFO L124 PetriNetUnfolderBase]: 1308/2302 cut-off events. [2024-06-28 00:21:20,542 INFO L125 PetriNetUnfolderBase]: For 36426/36432 co-relation queries the response was YES. [2024-06-28 00:21:20,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12535 conditions, 2302 events. 1308/2302 cut-off events. For 36426/36432 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 14520 event pairs, 613 based on Foata normal form. 7/2293 useless extension candidates. Maximal degree in co-relation 12440. Up to 2010 conditions per place. [2024-06-28 00:21:20,561 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 175 selfloop transitions, 38 changer transitions 0/220 dead transitions. [2024-06-28 00:21:20,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 220 transitions, 3044 flow [2024-06-28 00:21:20,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:21:20,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:21:20,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 00:21:20,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 00:21:20,563 INFO L175 Difference]: Start difference. First operand has 186 places, 201 transitions, 2446 flow. Second operand 8 states and 140 transitions. [2024-06-28 00:21:20,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 220 transitions, 3044 flow [2024-06-28 00:21:20,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 220 transitions, 2972 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 00:21:20,655 INFO L231 Difference]: Finished difference. Result has 190 places, 207 transitions, 2555 flow [2024-06-28 00:21:20,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2555, PETRI_PLACES=190, PETRI_TRANSITIONS=207} [2024-06-28 00:21:20,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-28 00:21:20,656 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 207 transitions, 2555 flow [2024-06-28 00:21:20,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:20,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:20,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:21:20,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 00:21:20,657 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:20,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:20,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1555676477, now seen corresponding path program 4 times [2024-06-28 00:21:20,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:20,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679881900] [2024-06-28 00:21:20,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:20,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:21,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:21,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679881900] [2024-06-28 00:21:21,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679881900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:21,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:21,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:21:21,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578548422] [2024-06-28 00:21:21,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:21,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:21:21,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:21,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:21:21,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:21:21,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:21:21,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 207 transitions, 2555 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 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) [2024-06-28 00:21:21,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:21,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:21:21,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:21,887 INFO L124 PetriNetUnfolderBase]: 1246/2235 cut-off events. [2024-06-28 00:21:21,887 INFO L125 PetriNetUnfolderBase]: For 37276/37307 co-relation queries the response was YES. [2024-06-28 00:21:21,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12010 conditions, 2235 events. 1246/2235 cut-off events. For 37276/37307 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 14291 event pairs, 428 based on Foata normal form. 28/2241 useless extension candidates. Maximal degree in co-relation 11914. Up to 1818 conditions per place. [2024-06-28 00:21:21,903 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 152 selfloop transitions, 36 changer transitions 0/220 dead transitions. [2024-06-28 00:21:21,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 220 transitions, 2965 flow [2024-06-28 00:21:21,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:21:21,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:21:21,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-28 00:21:21,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-28 00:21:21,905 INFO L175 Difference]: Start difference. First operand has 190 places, 207 transitions, 2555 flow. Second operand 7 states and 137 transitions. [2024-06-28 00:21:21,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 220 transitions, 2965 flow [2024-06-28 00:21:22,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 220 transitions, 2882 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-28 00:21:22,004 INFO L231 Difference]: Finished difference. Result has 193 places, 207 transitions, 2550 flow [2024-06-28 00:21:22,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2472, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2550, PETRI_PLACES=193, PETRI_TRANSITIONS=207} [2024-06-28 00:21:22,004 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-28 00:21:22,004 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 207 transitions, 2550 flow [2024-06-28 00:21:22,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 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) [2024-06-28 00:21:22,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:22,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:21:22,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 00:21:22,005 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:22,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:22,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1555682212, now seen corresponding path program 6 times [2024-06-28 00:21:22,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:22,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961059102] [2024-06-28 00:21:22,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:22,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:22,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:22,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961059102] [2024-06-28 00:21:22,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961059102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:22,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:22,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:21:22,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086964650] [2024-06-28 00:21:22,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:22,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:21:22,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:22,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:21:22,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:21:22,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:21:22,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 207 transitions, 2550 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:22,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:22,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:21:22,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:23,465 INFO L124 PetriNetUnfolderBase]: 1299/2278 cut-off events. [2024-06-28 00:21:23,465 INFO L125 PetriNetUnfolderBase]: For 38788/38794 co-relation queries the response was YES. [2024-06-28 00:21:23,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12516 conditions, 2278 events. 1299/2278 cut-off events. For 38788/38794 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 14330 event pairs, 607 based on Foata normal form. 9/2271 useless extension candidates. Maximal degree in co-relation 12419. Up to 1970 conditions per place. [2024-06-28 00:21:23,484 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 182 selfloop transitions, 37 changer transitions 0/226 dead transitions. [2024-06-28 00:21:23,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 226 transitions, 3064 flow [2024-06-28 00:21:23,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:21:23,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:21:23,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 00:21:23,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-28 00:21:23,485 INFO L175 Difference]: Start difference. First operand has 193 places, 207 transitions, 2550 flow. Second operand 8 states and 142 transitions. [2024-06-28 00:21:23,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 226 transitions, 3064 flow [2024-06-28 00:21:23,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 226 transitions, 2910 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-28 00:21:23,611 INFO L231 Difference]: Finished difference. Result has 193 places, 210 transitions, 2521 flow [2024-06-28 00:21:23,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2400, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2521, PETRI_PLACES=193, PETRI_TRANSITIONS=210} [2024-06-28 00:21:23,611 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-28 00:21:23,611 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 210 transitions, 2521 flow [2024-06-28 00:21:23,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:23,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:23,612 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] [2024-06-28 00:21:23,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 00:21:23,612 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:23,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:23,612 INFO L85 PathProgramCache]: Analyzing trace with hash 213399410, now seen corresponding path program 1 times [2024-06-28 00:21:23,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:23,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788944742] [2024-06-28 00:21:23,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:23,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:24,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:24,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788944742] [2024-06-28 00:21:24,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788944742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:24,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:24,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:21:24,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124122013] [2024-06-28 00:21:24,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:24,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:21:24,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:24,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:21:24,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:21:24,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:21:24,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 210 transitions, 2521 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:24,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:24,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:21:24,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:25,074 INFO L124 PetriNetUnfolderBase]: 1364/2410 cut-off events. [2024-06-28 00:21:25,074 INFO L125 PetriNetUnfolderBase]: For 42105/42115 co-relation queries the response was YES. [2024-06-28 00:21:25,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13221 conditions, 2410 events. 1364/2410 cut-off events. For 42105/42115 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15309 event pairs, 424 based on Foata normal form. 11/2409 useless extension candidates. Maximal degree in co-relation 13127. Up to 1971 conditions per place. [2024-06-28 00:21:25,096 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 187 selfloop transitions, 59 changer transitions 0/253 dead transitions. [2024-06-28 00:21:25,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 253 transitions, 3390 flow [2024-06-28 00:21:25,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:21:25,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:21:25,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-28 00:21:25,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-28 00:21:25,097 INFO L175 Difference]: Start difference. First operand has 193 places, 210 transitions, 2521 flow. Second operand 10 states and 179 transitions. [2024-06-28 00:21:25,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 253 transitions, 3390 flow [2024-06-28 00:21:25,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 253 transitions, 3299 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 00:21:25,262 INFO L231 Difference]: Finished difference. Result has 201 places, 227 transitions, 2905 flow [2024-06-28 00:21:25,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2430, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2905, PETRI_PLACES=201, PETRI_TRANSITIONS=227} [2024-06-28 00:21:25,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-28 00:21:25,263 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 227 transitions, 2905 flow [2024-06-28 00:21:25,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:25,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:25,263 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] [2024-06-28 00:21:25,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 00:21:25,263 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:25,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:25,264 INFO L85 PathProgramCache]: Analyzing trace with hash 723719252, now seen corresponding path program 2 times [2024-06-28 00:21:25,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:25,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011555263] [2024-06-28 00:21:25,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:25,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:26,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:26,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011555263] [2024-06-28 00:21:26,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011555263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:26,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:26,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:21:26,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768163564] [2024-06-28 00:21:26,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:26,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:21:26,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:26,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:21:26,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:21:26,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:21:26,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 227 transitions, 2905 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:26,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:26,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:21:26,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:27,080 INFO L124 PetriNetUnfolderBase]: 1377/2429 cut-off events. [2024-06-28 00:21:27,080 INFO L125 PetriNetUnfolderBase]: For 48093/48116 co-relation queries the response was YES. [2024-06-28 00:21:27,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13842 conditions, 2429 events. 1377/2429 cut-off events. For 48093/48116 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 15437 event pairs, 434 based on Foata normal form. 20/2435 useless extension candidates. Maximal degree in co-relation 13743. Up to 1983 conditions per place. [2024-06-28 00:21:27,102 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 184 selfloop transitions, 58 changer transitions 0/249 dead transitions. [2024-06-28 00:21:27,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 249 transitions, 3513 flow [2024-06-28 00:21:27,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:21:27,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:21:27,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-28 00:21:27,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-28 00:21:27,103 INFO L175 Difference]: Start difference. First operand has 201 places, 227 transitions, 2905 flow. Second operand 9 states and 157 transitions. [2024-06-28 00:21:27,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 249 transitions, 3513 flow [2024-06-28 00:21:27,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 249 transitions, 3344 flow, removed 73 selfloop flow, removed 3 redundant places. [2024-06-28 00:21:27,251 INFO L231 Difference]: Finished difference. Result has 207 places, 230 transitions, 2920 flow [2024-06-28 00:21:27,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2920, PETRI_PLACES=207, PETRI_TRANSITIONS=230} [2024-06-28 00:21:27,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-28 00:21:27,252 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 230 transitions, 2920 flow [2024-06-28 00:21:27,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:27,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:27,252 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] [2024-06-28 00:21:27,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 00:21:27,252 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:27,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:27,252 INFO L85 PathProgramCache]: Analyzing trace with hash 718373948, now seen corresponding path program 3 times [2024-06-28 00:21:27,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:27,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418509101] [2024-06-28 00:21:27,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:27,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:28,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:28,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:28,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418509101] [2024-06-28 00:21:28,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418509101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:28,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:28,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:21:28,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090533942] [2024-06-28 00:21:28,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:28,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:21:28,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:28,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:21:28,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:21:28,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:21:28,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 230 transitions, 2920 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:28,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:28,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:21:28,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:29,023 INFO L124 PetriNetUnfolderBase]: 1400/2463 cut-off events. [2024-06-28 00:21:29,024 INFO L125 PetriNetUnfolderBase]: For 46155/46178 co-relation queries the response was YES. [2024-06-28 00:21:29,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14002 conditions, 2463 events. 1400/2463 cut-off events. For 46155/46178 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 15642 event pairs, 436 based on Foata normal form. 23/2472 useless extension candidates. Maximal degree in co-relation 13901. Up to 1973 conditions per place. [2024-06-28 00:21:29,045 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 175 selfloop transitions, 65 changer transitions 0/247 dead transitions. [2024-06-28 00:21:29,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 247 transitions, 3548 flow [2024-06-28 00:21:29,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:21:29,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:21:29,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 00:21:29,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-28 00:21:29,046 INFO L175 Difference]: Start difference. First operand has 207 places, 230 transitions, 2920 flow. Second operand 8 states and 141 transitions. [2024-06-28 00:21:29,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 247 transitions, 3548 flow [2024-06-28 00:21:29,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 247 transitions, 3425 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-28 00:21:29,209 INFO L231 Difference]: Finished difference. Result has 206 places, 231 transitions, 3013 flow [2024-06-28 00:21:29,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2761, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3013, PETRI_PLACES=206, PETRI_TRANSITIONS=231} [2024-06-28 00:21:29,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-28 00:21:29,210 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 231 transitions, 3013 flow [2024-06-28 00:21:29,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:29,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:29,210 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] [2024-06-28 00:21:29,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 00:21:29,210 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:29,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:29,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1104666702, now seen corresponding path program 4 times [2024-06-28 00:21:29,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:29,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583679599] [2024-06-28 00:21:29,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:29,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:30,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:30,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583679599] [2024-06-28 00:21:30,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583679599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:30,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:30,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:21:30,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402264005] [2024-06-28 00:21:30,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:30,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:21:30,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:30,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:21:30,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:21:30,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:21:30,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 231 transitions, 3013 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:30,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:30,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:21:30,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:30,814 INFO L124 PetriNetUnfolderBase]: 1413/2488 cut-off events. [2024-06-28 00:21:30,814 INFO L125 PetriNetUnfolderBase]: For 49272/49282 co-relation queries the response was YES. [2024-06-28 00:21:30,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14400 conditions, 2488 events. 1413/2488 cut-off events. For 49272/49282 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 15865 event pairs, 440 based on Foata normal form. 11/2487 useless extension candidates. Maximal degree in co-relation 14299. Up to 2103 conditions per place. [2024-06-28 00:21:30,833 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 200 selfloop transitions, 44 changer transitions 0/251 dead transitions. [2024-06-28 00:21:30,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 251 transitions, 3593 flow [2024-06-28 00:21:30,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:21:30,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:21:30,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-28 00:21:30,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-28 00:21:30,835 INFO L175 Difference]: Start difference. First operand has 206 places, 231 transitions, 3013 flow. Second operand 9 states and 155 transitions. [2024-06-28 00:21:30,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 251 transitions, 3593 flow [2024-06-28 00:21:30,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 251 transitions, 3502 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-28 00:21:30,974 INFO L231 Difference]: Finished difference. Result has 211 places, 233 transitions, 3057 flow [2024-06-28 00:21:30,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2928, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3057, PETRI_PLACES=211, PETRI_TRANSITIONS=233} [2024-06-28 00:21:30,975 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-28 00:21:30,975 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 233 transitions, 3057 flow [2024-06-28 00:21:30,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:30,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:30,975 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] [2024-06-28 00:21:30,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 00:21:30,976 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:30,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:30,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1304367986, now seen corresponding path program 5 times [2024-06-28 00:21:30,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:30,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417668455] [2024-06-28 00:21:30,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:30,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:32,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:32,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417668455] [2024-06-28 00:21:32,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417668455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:32,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:32,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:21:32,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264360325] [2024-06-28 00:21:32,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:32,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:21:32,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:32,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:21:32,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:21:32,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:21:32,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 233 transitions, 3057 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:32,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:32,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:21:32,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:33,170 INFO L124 PetriNetUnfolderBase]: 1426/2505 cut-off events. [2024-06-28 00:21:33,170 INFO L125 PetriNetUnfolderBase]: For 50695/50705 co-relation queries the response was YES. [2024-06-28 00:21:33,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14522 conditions, 2505 events. 1426/2505 cut-off events. For 50695/50705 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 15953 event pairs, 435 based on Foata normal form. 11/2504 useless extension candidates. Maximal degree in co-relation 14419. Up to 1948 conditions per place. [2024-06-28 00:21:33,193 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 191 selfloop transitions, 67 changer transitions 0/265 dead transitions. [2024-06-28 00:21:33,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 265 transitions, 3830 flow [2024-06-28 00:21:33,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:21:33,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:21:33,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 00:21:33,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:21:33,194 INFO L175 Difference]: Start difference. First operand has 211 places, 233 transitions, 3057 flow. Second operand 8 states and 152 transitions. [2024-06-28 00:21:33,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 265 transitions, 3830 flow [2024-06-28 00:21:33,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 265 transitions, 3687 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-28 00:21:33,336 INFO L231 Difference]: Finished difference. Result has 212 places, 240 transitions, 3193 flow [2024-06-28 00:21:33,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2914, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3193, PETRI_PLACES=212, PETRI_TRANSITIONS=240} [2024-06-28 00:21:33,337 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-28 00:21:33,337 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 240 transitions, 3193 flow [2024-06-28 00:21:33,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:33,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:33,337 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] [2024-06-28 00:21:33,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 00:21:33,337 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:33,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:33,337 INFO L85 PathProgramCache]: Analyzing trace with hash -451528080, now seen corresponding path program 6 times [2024-06-28 00:21:33,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:33,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675000756] [2024-06-28 00:21:33,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:33,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:34,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:34,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675000756] [2024-06-28 00:21:34,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675000756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:34,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:34,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:21:34,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869060326] [2024-06-28 00:21:34,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:34,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:21:34,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:34,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:21:34,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:21:34,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:21:34,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 240 transitions, 3193 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:34,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:34,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:21:34,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:34,869 INFO L124 PetriNetUnfolderBase]: 1444/2539 cut-off events. [2024-06-28 00:21:34,869 INFO L125 PetriNetUnfolderBase]: For 54448/54471 co-relation queries the response was YES. [2024-06-28 00:21:34,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15017 conditions, 2539 events. 1444/2539 cut-off events. For 54448/54471 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 16260 event pairs, 446 based on Foata normal form. 20/2547 useless extension candidates. Maximal degree in co-relation 14912. Up to 2147 conditions per place. [2024-06-28 00:21:34,933 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 206 selfloop transitions, 46 changer transitions 0/259 dead transitions. [2024-06-28 00:21:34,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 259 transitions, 3824 flow [2024-06-28 00:21:34,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:21:34,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:21:34,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 00:21:34,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-28 00:21:34,934 INFO L175 Difference]: Start difference. First operand has 212 places, 240 transitions, 3193 flow. Second operand 8 states and 141 transitions. [2024-06-28 00:21:34,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 259 transitions, 3824 flow [2024-06-28 00:21:35,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 259 transitions, 3755 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-28 00:21:35,079 INFO L231 Difference]: Finished difference. Result has 217 places, 245 transitions, 3312 flow [2024-06-28 00:21:35,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3124, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3312, PETRI_PLACES=217, PETRI_TRANSITIONS=245} [2024-06-28 00:21:35,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-28 00:21:35,080 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 245 transitions, 3312 flow [2024-06-28 00:21:35,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:35,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:35,080 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] [2024-06-28 00:21:35,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 00:21:35,080 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:35,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:35,081 INFO L85 PathProgramCache]: Analyzing trace with hash 981501646, now seen corresponding path program 7 times [2024-06-28 00:21:35,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:35,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77959536] [2024-06-28 00:21:35,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:35,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:36,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:36,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77959536] [2024-06-28 00:21:36,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77959536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:36,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:36,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:21:36,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295293876] [2024-06-28 00:21:36,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:36,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:21:36,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:36,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:21:36,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:21:36,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:21:36,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 245 transitions, 3312 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:36,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:36,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:21:36,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:36,769 INFO L124 PetriNetUnfolderBase]: 1457/2554 cut-off events. [2024-06-28 00:21:36,769 INFO L125 PetriNetUnfolderBase]: For 56064/56087 co-relation queries the response was YES. [2024-06-28 00:21:36,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15184 conditions, 2554 events. 1457/2554 cut-off events. For 56064/56087 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 16246 event pairs, 426 based on Foata normal form. 20/2562 useless extension candidates. Maximal degree in co-relation 15076. Up to 1976 conditions per place. [2024-06-28 00:21:36,791 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 189 selfloop transitions, 73 changer transitions 0/269 dead transitions. [2024-06-28 00:21:36,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 269 transitions, 4082 flow [2024-06-28 00:21:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:21:36,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:21:36,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 00:21:36,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-28 00:21:36,793 INFO L175 Difference]: Start difference. First operand has 217 places, 245 transitions, 3312 flow. Second operand 8 states and 149 transitions. [2024-06-28 00:21:36,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 269 transitions, 4082 flow [2024-06-28 00:21:36,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 269 transitions, 3963 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 00:21:36,959 INFO L231 Difference]: Finished difference. Result has 220 places, 247 transitions, 3381 flow [2024-06-28 00:21:36,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3193, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3381, PETRI_PLACES=220, PETRI_TRANSITIONS=247} [2024-06-28 00:21:36,960 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-28 00:21:36,960 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 247 transitions, 3381 flow [2024-06-28 00:21:36,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:36,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:36,960 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] [2024-06-28 00:21:36,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 00:21:36,960 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:36,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:36,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1209195406, now seen corresponding path program 8 times [2024-06-28 00:21:36,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:36,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836905268] [2024-06-28 00:21:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:36,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:38,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:38,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836905268] [2024-06-28 00:21:38,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836905268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:38,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:38,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:21:38,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531140266] [2024-06-28 00:21:38,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:38,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:21:38,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:38,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:21:38,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:21:38,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:21:38,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 247 transitions, 3381 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:38,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:38,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:21:38,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:39,114 INFO L124 PetriNetUnfolderBase]: 1476/2591 cut-off events. [2024-06-28 00:21:39,114 INFO L125 PetriNetUnfolderBase]: For 59766/59789 co-relation queries the response was YES. [2024-06-28 00:21:39,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15606 conditions, 2591 events. 1476/2591 cut-off events. For 59766/59789 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 16607 event pairs, 432 based on Foata normal form. 20/2599 useless extension candidates. Maximal degree in co-relation 15496. Up to 1996 conditions per place. [2024-06-28 00:21:39,138 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 183 selfloop transitions, 87 changer transitions 0/277 dead transitions. [2024-06-28 00:21:39,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 277 transitions, 4269 flow [2024-06-28 00:21:39,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:21:39,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:21:39,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-28 00:21:39,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 00:21:39,139 INFO L175 Difference]: Start difference. First operand has 220 places, 247 transitions, 3381 flow. Second operand 10 states and 175 transitions. [2024-06-28 00:21:39,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 277 transitions, 4269 flow [2024-06-28 00:21:39,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 277 transitions, 4185 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 00:21:39,316 INFO L231 Difference]: Finished difference. Result has 228 places, 257 transitions, 3775 flow [2024-06-28 00:21:39,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3303, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3775, PETRI_PLACES=228, PETRI_TRANSITIONS=257} [2024-06-28 00:21:39,317 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-28 00:21:39,317 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 257 transitions, 3775 flow [2024-06-28 00:21:39,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:39,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:39,317 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] [2024-06-28 00:21:39,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 00:21:39,317 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:39,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:39,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1209402796, now seen corresponding path program 9 times [2024-06-28 00:21:39,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:39,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281553064] [2024-06-28 00:21:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:39,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:40,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:40,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281553064] [2024-06-28 00:21:40,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281553064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:40,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:40,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:21:40,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587763884] [2024-06-28 00:21:40,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:40,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:21:40,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:40,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:21:40,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:21:40,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:21:40,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 257 transitions, 3775 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:40,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:40,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:21:40,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:40,851 INFO L124 PetriNetUnfolderBase]: 1465/2570 cut-off events. [2024-06-28 00:21:40,851 INFO L125 PetriNetUnfolderBase]: For 60479/60502 co-relation queries the response was YES. [2024-06-28 00:21:40,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15618 conditions, 2570 events. 1465/2570 cut-off events. For 60479/60502 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 16374 event pairs, 425 based on Foata normal form. 20/2578 useless extension candidates. Maximal degree in co-relation 15504. Up to 1986 conditions per place. [2024-06-28 00:21:40,876 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 185 selfloop transitions, 79 changer transitions 0/271 dead transitions. [2024-06-28 00:21:40,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 271 transitions, 4241 flow [2024-06-28 00:21:40,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:21:40,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:21:40,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 00:21:40,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 00:21:40,878 INFO L175 Difference]: Start difference. First operand has 228 places, 257 transitions, 3775 flow. Second operand 8 states and 146 transitions. [2024-06-28 00:21:40,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 271 transitions, 4241 flow [2024-06-28 00:21:41,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 271 transitions, 3921 flow, removed 103 selfloop flow, removed 8 redundant places. [2024-06-28 00:21:41,104 INFO L231 Difference]: Finished difference. Result has 227 places, 253 transitions, 3489 flow [2024-06-28 00:21:41,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3331, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3489, PETRI_PLACES=227, PETRI_TRANSITIONS=253} [2024-06-28 00:21:41,105 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-28 00:21:41,105 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 253 transitions, 3489 flow [2024-06-28 00:21:41,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:41,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:41,106 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] [2024-06-28 00:21:41,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 00:21:41,106 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:41,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:41,106 INFO L85 PathProgramCache]: Analyzing trace with hash 803954416, now seen corresponding path program 10 times [2024-06-28 00:21:41,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:41,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292474510] [2024-06-28 00:21:41,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:41,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:42,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:42,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292474510] [2024-06-28 00:21:42,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292474510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:42,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:42,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:21:42,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280051949] [2024-06-28 00:21:42,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:42,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:21:42,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:42,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:21:42,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:21:42,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:21:42,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 253 transitions, 3489 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:42,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:42,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:21:42,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:42,927 INFO L124 PetriNetUnfolderBase]: 1454/2555 cut-off events. [2024-06-28 00:21:42,927 INFO L125 PetriNetUnfolderBase]: For 38808/38831 co-relation queries the response was YES. [2024-06-28 00:21:42,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14551 conditions, 2555 events. 1454/2555 cut-off events. For 38808/38831 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 16339 event pairs, 442 based on Foata normal form. 20/2563 useless extension candidates. Maximal degree in co-relation 14443. Up to 2123 conditions per place. [2024-06-28 00:21:42,951 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 209 selfloop transitions, 54 changer transitions 0/270 dead transitions. [2024-06-28 00:21:42,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 270 transitions, 4050 flow [2024-06-28 00:21:42,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:21:42,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:21:42,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-28 00:21:42,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-28 00:21:42,952 INFO L175 Difference]: Start difference. First operand has 227 places, 253 transitions, 3489 flow. Second operand 11 states and 182 transitions. [2024-06-28 00:21:42,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 270 transitions, 4050 flow [2024-06-28 00:21:43,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 270 transitions, 3846 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-28 00:21:43,081 INFO L231 Difference]: Finished difference. Result has 224 places, 250 transitions, 3368 flow [2024-06-28 00:21:43,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3241, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3368, PETRI_PLACES=224, PETRI_TRANSITIONS=250} [2024-06-28 00:21:43,082 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-28 00:21:43,082 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 250 transitions, 3368 flow [2024-06-28 00:21:43,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:43,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:43,083 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] [2024-06-28 00:21:43,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 00:21:43,083 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:43,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:43,083 INFO L85 PathProgramCache]: Analyzing trace with hash 992176852, now seen corresponding path program 1 times [2024-06-28 00:21:43,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:43,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350284747] [2024-06-28 00:21:43,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:43,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:44,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:44,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350284747] [2024-06-28 00:21:44,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350284747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:44,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:44,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:21:44,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716292339] [2024-06-28 00:21:44,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:44,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:21:44,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:44,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:21:44,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:21:44,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:21:44,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 250 transitions, 3368 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) [2024-06-28 00:21:44,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:44,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:21:44,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:44,722 INFO L124 PetriNetUnfolderBase]: 1520/2649 cut-off events. [2024-06-28 00:21:44,722 INFO L125 PetriNetUnfolderBase]: For 44123/44123 co-relation queries the response was YES. [2024-06-28 00:21:44,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14900 conditions, 2649 events. 1520/2649 cut-off events. For 44123/44123 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 16998 event pairs, 621 based on Foata normal form. 6/2643 useless extension candidates. Maximal degree in co-relation 14800. Up to 2104 conditions per place. [2024-06-28 00:21:44,746 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 233 selfloop transitions, 55 changer transitions 0/296 dead transitions. [2024-06-28 00:21:44,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 296 transitions, 4260 flow [2024-06-28 00:21:44,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:21:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:21:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-28 00:21:44,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-06-28 00:21:44,747 INFO L175 Difference]: Start difference. First operand has 224 places, 250 transitions, 3368 flow. Second operand 8 states and 171 transitions. [2024-06-28 00:21:44,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 296 transitions, 4260 flow [2024-06-28 00:21:44,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 296 transitions, 4075 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-28 00:21:44,871 INFO L231 Difference]: Finished difference. Result has 226 places, 257 transitions, 3428 flow [2024-06-28 00:21:44,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3183, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3428, PETRI_PLACES=226, PETRI_TRANSITIONS=257} [2024-06-28 00:21:44,871 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-28 00:21:44,871 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 257 transitions, 3428 flow [2024-06-28 00:21:44,872 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) [2024-06-28 00:21:44,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:44,872 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] [2024-06-28 00:21:44,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 00:21:44,872 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:44,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:44,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1005499436, now seen corresponding path program 2 times [2024-06-28 00:21:44,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:44,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261450182] [2024-06-28 00:21:44,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:44,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:46,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:46,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261450182] [2024-06-28 00:21:46,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261450182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:46,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:46,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:21:46,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800996954] [2024-06-28 00:21:46,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:46,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:21:46,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:46,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:21:46,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:21:46,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:21:46,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 257 transitions, 3428 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:46,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:46,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:21:46,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:46,922 INFO L124 PetriNetUnfolderBase]: 1540/2689 cut-off events. [2024-06-28 00:21:46,922 INFO L125 PetriNetUnfolderBase]: For 46887/46887 co-relation queries the response was YES. [2024-06-28 00:21:46,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15083 conditions, 2689 events. 1540/2689 cut-off events. For 46887/46887 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 17306 event pairs, 630 based on Foata normal form. 6/2683 useless extension candidates. Maximal degree in co-relation 14983. Up to 2234 conditions per place. [2024-06-28 00:21:46,946 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 234 selfloop transitions, 52 changer transitions 0/293 dead transitions. [2024-06-28 00:21:46,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 293 transitions, 4320 flow [2024-06-28 00:21:46,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:21:46,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:21:46,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 00:21:46,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-28 00:21:46,948 INFO L175 Difference]: Start difference. First operand has 226 places, 257 transitions, 3428 flow. Second operand 9 states and 170 transitions. [2024-06-28 00:21:46,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 293 transitions, 4320 flow [2024-06-28 00:21:47,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 293 transitions, 4262 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-28 00:21:47,072 INFO L231 Difference]: Finished difference. Result has 235 places, 261 transitions, 3542 flow [2024-06-28 00:21:47,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3370, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3542, PETRI_PLACES=235, PETRI_TRANSITIONS=261} [2024-06-28 00:21:47,073 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-28 00:21:47,073 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 261 transitions, 3542 flow [2024-06-28 00:21:47,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:47,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:47,073 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] [2024-06-28 00:21:47,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 00:21:47,074 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:47,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:47,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1909298918, now seen corresponding path program 1 times [2024-06-28 00:21:47,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:47,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342705951] [2024-06-28 00:21:47,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:47,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:48,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:48,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342705951] [2024-06-28 00:21:48,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342705951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:48,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:48,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:21:48,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884295997] [2024-06-28 00:21:48,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:48,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:21:48,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:48,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:21:48,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:21:48,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:21:48,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 261 transitions, 3542 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) [2024-06-28 00:21:48,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:48,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:21:48,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:49,410 INFO L124 PetriNetUnfolderBase]: 1535/2680 cut-off events. [2024-06-28 00:21:49,410 INFO L125 PetriNetUnfolderBase]: For 45926/45926 co-relation queries the response was YES. [2024-06-28 00:21:49,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15140 conditions, 2680 events. 1535/2680 cut-off events. For 45926/45926 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 17241 event pairs, 645 based on Foata normal form. 2/2670 useless extension candidates. Maximal degree in co-relation 15036. Up to 2301 conditions per place. [2024-06-28 00:21:49,434 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 227 selfloop transitions, 49 changer transitions 0/284 dead transitions. [2024-06-28 00:21:49,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 284 transitions, 4222 flow [2024-06-28 00:21:49,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:21:49,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:21:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-28 00:21:49,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2024-06-28 00:21:49,435 INFO L175 Difference]: Start difference. First operand has 235 places, 261 transitions, 3542 flow. Second operand 7 states and 146 transitions. [2024-06-28 00:21:49,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 284 transitions, 4222 flow [2024-06-28 00:21:49,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 284 transitions, 4049 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-28 00:21:49,585 INFO L231 Difference]: Finished difference. Result has 235 places, 261 transitions, 3474 flow [2024-06-28 00:21:49,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3369, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3474, PETRI_PLACES=235, PETRI_TRANSITIONS=261} [2024-06-28 00:21:49,585 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-28 00:21:49,586 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 261 transitions, 3474 flow [2024-06-28 00:21:49,586 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) [2024-06-28 00:21:49,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:49,586 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] [2024-06-28 00:21:49,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 00:21:49,586 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:49,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:49,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1419824200, now seen corresponding path program 3 times [2024-06-28 00:21:49,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:49,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177955309] [2024-06-28 00:21:49,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:49,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:51,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:51,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177955309] [2024-06-28 00:21:51,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177955309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:51,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:51,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:21:51,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480620318] [2024-06-28 00:21:51,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:51,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:21:51,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:51,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:21:51,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:21:51,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:21:51,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 261 transitions, 3474 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) [2024-06-28 00:21:51,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:51,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:21:51,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:51,605 INFO L124 PetriNetUnfolderBase]: 1542/2697 cut-off events. [2024-06-28 00:21:51,606 INFO L125 PetriNetUnfolderBase]: For 48096/48096 co-relation queries the response was YES. [2024-06-28 00:21:51,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14794 conditions, 2697 events. 1542/2697 cut-off events. For 48096/48096 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17394 event pairs, 646 based on Foata normal form. 6/2691 useless extension candidates. Maximal degree in co-relation 14692. Up to 2298 conditions per place. [2024-06-28 00:21:51,629 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 231 selfloop transitions, 49 changer transitions 0/288 dead transitions. [2024-06-28 00:21:51,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 288 transitions, 4184 flow [2024-06-28 00:21:51,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:21:51,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:21:51,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-28 00:21:51,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-28 00:21:51,630 INFO L175 Difference]: Start difference. First operand has 235 places, 261 transitions, 3474 flow. Second operand 8 states and 161 transitions. [2024-06-28 00:21:51,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 288 transitions, 4184 flow [2024-06-28 00:21:51,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 288 transitions, 4072 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 00:21:51,778 INFO L231 Difference]: Finished difference. Result has 236 places, 262 transitions, 3478 flow [2024-06-28 00:21:51,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3364, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3478, PETRI_PLACES=236, PETRI_TRANSITIONS=262} [2024-06-28 00:21:51,779 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-28 00:21:51,779 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 262 transitions, 3478 flow [2024-06-28 00:21:51,779 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) [2024-06-28 00:21:51,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:51,779 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] [2024-06-28 00:21:51,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 00:21:51,779 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:51,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:51,780 INFO L85 PathProgramCache]: Analyzing trace with hash -890023940, now seen corresponding path program 2 times [2024-06-28 00:21:51,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:51,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516751563] [2024-06-28 00:21:51,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:51,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:52,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:52,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:52,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516751563] [2024-06-28 00:21:52,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516751563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:52,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:52,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:21:52,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662327025] [2024-06-28 00:21:52,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:52,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:21:52,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:52,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:21:52,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:21:52,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:21:52,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 262 transitions, 3478 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:52,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:52,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:21:52,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:53,227 INFO L124 PetriNetUnfolderBase]: 1550/2709 cut-off events. [2024-06-28 00:21:53,227 INFO L125 PetriNetUnfolderBase]: For 46229/46229 co-relation queries the response was YES. [2024-06-28 00:21:53,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14873 conditions, 2709 events. 1550/2709 cut-off events. For 46229/46229 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 17513 event pairs, 644 based on Foata normal form. 2/2699 useless extension candidates. Maximal degree in co-relation 14770. Up to 2348 conditions per place. [2024-06-28 00:21:53,252 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 240 selfloop transitions, 37 changer transitions 0/284 dead transitions. [2024-06-28 00:21:53,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 284 transitions, 4114 flow [2024-06-28 00:21:53,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:21:53,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:21:53,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-28 00:21:53,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-28 00:21:53,254 INFO L175 Difference]: Start difference. First operand has 236 places, 262 transitions, 3478 flow. Second operand 9 states and 156 transitions. [2024-06-28 00:21:53,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 284 transitions, 4114 flow [2024-06-28 00:21:53,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 284 transitions, 4014 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 00:21:53,410 INFO L231 Difference]: Finished difference. Result has 239 places, 264 transitions, 3493 flow [2024-06-28 00:21:53,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3378, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3493, PETRI_PLACES=239, PETRI_TRANSITIONS=264} [2024-06-28 00:21:53,410 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-28 00:21:53,411 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 264 transitions, 3493 flow [2024-06-28 00:21:53,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:53,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:53,411 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] [2024-06-28 00:21:53,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 00:21:53,411 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:53,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:53,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1304359864, now seen corresponding path program 3 times [2024-06-28 00:21:53,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:53,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490777141] [2024-06-28 00:21:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:53,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:54,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:54,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:54,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490777141] [2024-06-28 00:21:54,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490777141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:54,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:54,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:21:54,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607003052] [2024-06-28 00:21:54,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:54,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:21:54,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:54,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:21:54,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:21:54,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:21:54,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 264 transitions, 3493 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:54,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:54,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:21:54,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:55,613 INFO L124 PetriNetUnfolderBase]: 1558/2719 cut-off events. [2024-06-28 00:21:55,613 INFO L125 PetriNetUnfolderBase]: For 48170/48170 co-relation queries the response was YES. [2024-06-28 00:21:55,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15002 conditions, 2719 events. 1558/2719 cut-off events. For 48170/48170 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 17530 event pairs, 652 based on Foata normal form. 2/2709 useless extension candidates. Maximal degree in co-relation 14897. Up to 2390 conditions per place. [2024-06-28 00:21:55,633 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 244 selfloop transitions, 33 changer transitions 0/284 dead transitions. [2024-06-28 00:21:55,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 284 transitions, 4137 flow [2024-06-28 00:21:55,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:21:55,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:21:55,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-28 00:21:55,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-28 00:21:55,634 INFO L175 Difference]: Start difference. First operand has 239 places, 264 transitions, 3493 flow. Second operand 10 states and 166 transitions. [2024-06-28 00:21:55,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 284 transitions, 4137 flow [2024-06-28 00:21:55,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 284 transitions, 4054 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-28 00:21:55,783 INFO L231 Difference]: Finished difference. Result has 242 places, 266 transitions, 3525 flow [2024-06-28 00:21:55,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3410, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3525, PETRI_PLACES=242, PETRI_TRANSITIONS=266} [2024-06-28 00:21:55,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-28 00:21:55,784 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 266 transitions, 3525 flow [2024-06-28 00:21:55,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:21:55,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:55,784 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] [2024-06-28 00:21:55,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 00:21:55,784 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:55,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:55,784 INFO L85 PathProgramCache]: Analyzing trace with hash -890030636, now seen corresponding path program 4 times [2024-06-28 00:21:55,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:55,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280292077] [2024-06-28 00:21:55,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:55,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:56,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:56,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280292077] [2024-06-28 00:21:56,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280292077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:56,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:56,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:21:56,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090607163] [2024-06-28 00:21:56,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:56,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:21:56,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:56,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:21:56,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:21:56,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:21:56,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 266 transitions, 3525 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) [2024-06-28 00:21:56,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:56,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:21:56,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:57,207 INFO L124 PetriNetUnfolderBase]: 1586/2764 cut-off events. [2024-06-28 00:21:57,207 INFO L125 PetriNetUnfolderBase]: For 52828/52828 co-relation queries the response was YES. [2024-06-28 00:21:57,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15276 conditions, 2764 events. 1586/2764 cut-off events. For 52828/52828 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 17814 event pairs, 650 based on Foata normal form. 6/2758 useless extension candidates. Maximal degree in co-relation 15172. Up to 2422 conditions per place. [2024-06-28 00:21:57,229 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 257 selfloop transitions, 26 changer transitions 0/291 dead transitions. [2024-06-28 00:21:57,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 291 transitions, 4273 flow [2024-06-28 00:21:57,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:21:57,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:21:57,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-28 00:21:57,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-28 00:21:57,230 INFO L175 Difference]: Start difference. First operand has 242 places, 266 transitions, 3525 flow. Second operand 8 states and 153 transitions. [2024-06-28 00:21:57,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 291 transitions, 4273 flow [2024-06-28 00:21:57,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 291 transitions, 4185 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-28 00:21:57,400 INFO L231 Difference]: Finished difference. Result has 243 places, 270 transitions, 3569 flow [2024-06-28 00:21:57,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3437, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3569, PETRI_PLACES=243, PETRI_TRANSITIONS=270} [2024-06-28 00:21:57,401 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-28 00:21:57,401 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 270 transitions, 3569 flow [2024-06-28 00:21:57,401 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) [2024-06-28 00:21:57,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:57,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:21:57,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 00:21:57,402 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:57,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:57,402 INFO L85 PathProgramCache]: Analyzing trace with hash -890208266, now seen corresponding path program 5 times [2024-06-28 00:21:57,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:57,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139372386] [2024-06-28 00:21:57,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:57,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:21:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:21:58,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:21:58,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139372386] [2024-06-28 00:21:58,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139372386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:21:58,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:21:58,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:21:58,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765758742] [2024-06-28 00:21:58,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:21:58,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:21:58,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:21:58,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:21:58,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:21:58,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:21:58,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 270 transitions, 3569 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) [2024-06-28 00:21:58,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:21:58,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:21:58,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:21:58,918 INFO L124 PetriNetUnfolderBase]: 1639/2857 cut-off events. [2024-06-28 00:21:58,918 INFO L125 PetriNetUnfolderBase]: For 59522/59522 co-relation queries the response was YES. [2024-06-28 00:21:58,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16082 conditions, 2857 events. 1639/2857 cut-off events. For 59522/59522 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 18526 event pairs, 659 based on Foata normal form. 6/2851 useless extension candidates. Maximal degree in co-relation 15978. Up to 2444 conditions per place. [2024-06-28 00:21:58,942 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 264 selfloop transitions, 25 changer transitions 0/297 dead transitions. [2024-06-28 00:21:58,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 297 transitions, 4323 flow [2024-06-28 00:21:58,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:21:58,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:21:58,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-28 00:21:58,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-28 00:21:58,943 INFO L175 Difference]: Start difference. First operand has 243 places, 270 transitions, 3569 flow. Second operand 8 states and 154 transitions. [2024-06-28 00:21:58,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 297 transitions, 4323 flow [2024-06-28 00:21:59,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 297 transitions, 4277 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 00:21:59,155 INFO L231 Difference]: Finished difference. Result has 247 places, 273 transitions, 3619 flow [2024-06-28 00:21:59,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3523, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3619, PETRI_PLACES=247, PETRI_TRANSITIONS=273} [2024-06-28 00:21:59,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-28 00:21:59,156 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 273 transitions, 3619 flow [2024-06-28 00:21:59,156 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) [2024-06-28 00:21:59,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:21:59,156 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] [2024-06-28 00:21:59,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 00:21:59,157 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:21:59,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:21:59,157 INFO L85 PathProgramCache]: Analyzing trace with hash -890203430, now seen corresponding path program 4 times [2024-06-28 00:21:59,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:21:59,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186125888] [2024-06-28 00:21:59,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:21:59,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:21:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:00,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:00,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186125888] [2024-06-28 00:22:00,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186125888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:00,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:00,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:22:00,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61180159] [2024-06-28 00:22:00,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:00,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:22:00,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:00,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:22:00,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:22:00,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:22:00,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 273 transitions, 3619 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:00,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:00,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:22:00,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:00,981 INFO L124 PetriNetUnfolderBase]: 1646/2876 cut-off events. [2024-06-28 00:22:00,982 INFO L125 PetriNetUnfolderBase]: For 62635/62635 co-relation queries the response was YES. [2024-06-28 00:22:00,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16142 conditions, 2876 events. 1646/2876 cut-off events. For 62635/62635 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 18699 event pairs, 664 based on Foata normal form. 12/2876 useless extension candidates. Maximal degree in co-relation 16035. Up to 2485 conditions per place. [2024-06-28 00:22:01,008 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 251 selfloop transitions, 39 changer transitions 0/297 dead transitions. [2024-06-28 00:22:01,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 297 transitions, 4332 flow [2024-06-28 00:22:01,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:22:01,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:22:01,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-28 00:22:01,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 00:22:01,009 INFO L175 Difference]: Start difference. First operand has 247 places, 273 transitions, 3619 flow. Second operand 10 states and 170 transitions. [2024-06-28 00:22:01,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 297 transitions, 4332 flow [2024-06-28 00:22:01,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 297 transitions, 4293 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 00:22:01,181 INFO L231 Difference]: Finished difference. Result has 253 places, 276 transitions, 3719 flow [2024-06-28 00:22:01,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3584, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3719, PETRI_PLACES=253, PETRI_TRANSITIONS=276} [2024-06-28 00:22:01,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-28 00:22:01,182 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 276 transitions, 3719 flow [2024-06-28 00:22:01,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:01,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:01,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:22:01,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 00:22:01,183 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:01,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:01,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1670910188, now seen corresponding path program 5 times [2024-06-28 00:22:01,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:01,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636669426] [2024-06-28 00:22:01,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:01,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:02,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:02,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636669426] [2024-06-28 00:22:02,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636669426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:02,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:02,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:22:02,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162267008] [2024-06-28 00:22:02,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:02,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:22:02,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:02,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:22:02,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:22:02,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:22:02,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 276 transitions, 3719 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:02,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:02,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:22:02,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:03,205 INFO L124 PetriNetUnfolderBase]: 1654/2897 cut-off events. [2024-06-28 00:22:03,206 INFO L125 PetriNetUnfolderBase]: For 59740/59746 co-relation queries the response was YES. [2024-06-28 00:22:03,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16430 conditions, 2897 events. 1654/2897 cut-off events. For 59740/59746 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 18981 event pairs, 667 based on Foata normal form. 8/2893 useless extension candidates. Maximal degree in co-relation 16320. Up to 2541 conditions per place. [2024-06-28 00:22:03,233 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 252 selfloop transitions, 32 changer transitions 0/291 dead transitions. [2024-06-28 00:22:03,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 291 transitions, 4367 flow [2024-06-28 00:22:03,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:22:03,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:22:03,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 00:22:03,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-28 00:22:03,234 INFO L175 Difference]: Start difference. First operand has 253 places, 276 transitions, 3719 flow. Second operand 8 states and 139 transitions. [2024-06-28 00:22:03,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 291 transitions, 4367 flow [2024-06-28 00:22:03,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 291 transitions, 4290 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 00:22:03,419 INFO L231 Difference]: Finished difference. Result has 254 places, 278 transitions, 3763 flow [2024-06-28 00:22:03,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3763, PETRI_PLACES=254, PETRI_TRANSITIONS=278} [2024-06-28 00:22:03,419 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-28 00:22:03,419 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 278 transitions, 3763 flow [2024-06-28 00:22:03,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:03,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:03,420 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] [2024-06-28 00:22:03,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 00:22:03,420 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:03,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:03,420 INFO L85 PathProgramCache]: Analyzing trace with hash 981509582, now seen corresponding path program 6 times [2024-06-28 00:22:03,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:03,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389053685] [2024-06-28 00:22:03,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:03,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:04,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:04,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389053685] [2024-06-28 00:22:04,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389053685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:04,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:04,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:22:04,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386660554] [2024-06-28 00:22:04,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:04,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:22:04,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:04,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:22:04,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:22:04,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:22:04,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 278 transitions, 3763 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:04,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:04,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:22:04,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:05,030 INFO L124 PetriNetUnfolderBase]: 1674/2931 cut-off events. [2024-06-28 00:22:05,030 INFO L125 PetriNetUnfolderBase]: For 65102/65108 co-relation queries the response was YES. [2024-06-28 00:22:05,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16617 conditions, 2931 events. 1674/2931 cut-off events. For 65102/65108 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 19253 event pairs, 658 based on Foata normal form. 12/2931 useless extension candidates. Maximal degree in co-relation 16506. Up to 2517 conditions per place. [2024-06-28 00:22:05,058 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 254 selfloop transitions, 38 changer transitions 0/299 dead transitions. [2024-06-28 00:22:05,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 299 transitions, 4417 flow [2024-06-28 00:22:05,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:22:05,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:22:05,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-28 00:22:05,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-28 00:22:05,059 INFO L175 Difference]: Start difference. First operand has 254 places, 278 transitions, 3763 flow. Second operand 10 states and 167 transitions. [2024-06-28 00:22:05,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 299 transitions, 4417 flow [2024-06-28 00:22:05,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 299 transitions, 4334 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 00:22:05,246 INFO L231 Difference]: Finished difference. Result has 259 places, 279 transitions, 3779 flow [2024-06-28 00:22:05,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3680, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3779, PETRI_PLACES=259, PETRI_TRANSITIONS=279} [2024-06-28 00:22:05,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-28 00:22:05,247 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 279 transitions, 3779 flow [2024-06-28 00:22:05,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:05,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:05,247 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] [2024-06-28 00:22:05,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 00:22:05,247 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:05,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:05,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1209648068, now seen corresponding path program 6 times [2024-06-28 00:22:05,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:05,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071039933] [2024-06-28 00:22:05,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:05,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:06,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:06,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071039933] [2024-06-28 00:22:06,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071039933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:06,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:06,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:22:06,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893054863] [2024-06-28 00:22:06,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:06,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:22:06,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:06,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:22:06,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:22:06,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:22:06,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 279 transitions, 3779 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:06,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:06,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:22:06,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:06,892 INFO L124 PetriNetUnfolderBase]: 1669/2920 cut-off events. [2024-06-28 00:22:06,892 INFO L125 PetriNetUnfolderBase]: For 63053/63059 co-relation queries the response was YES. [2024-06-28 00:22:06,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16591 conditions, 2920 events. 1669/2920 cut-off events. For 63053/63059 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 19099 event pairs, 654 based on Foata normal form. 8/2916 useless extension candidates. Maximal degree in co-relation 16479. Up to 2536 conditions per place. [2024-06-28 00:22:06,915 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 249 selfloop transitions, 38 changer transitions 0/294 dead transitions. [2024-06-28 00:22:06,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 294 transitions, 4391 flow [2024-06-28 00:22:06,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:22:06,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:22:06,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 00:22:06,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 00:22:06,916 INFO L175 Difference]: Start difference. First operand has 259 places, 279 transitions, 3779 flow. Second operand 8 states and 140 transitions. [2024-06-28 00:22:06,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 294 transitions, 4391 flow [2024-06-28 00:22:07,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 294 transitions, 4308 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-28 00:22:07,125 INFO L231 Difference]: Finished difference. Result has 259 places, 279 transitions, 3781 flow [2024-06-28 00:22:07,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3696, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3781, PETRI_PLACES=259, PETRI_TRANSITIONS=279} [2024-06-28 00:22:07,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-28 00:22:07,125 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 279 transitions, 3781 flow [2024-06-28 00:22:07,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:07,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:07,126 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] [2024-06-28 00:22:07,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 00:22:07,126 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:07,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:07,126 INFO L85 PathProgramCache]: Analyzing trace with hash 981331952, now seen corresponding path program 7 times [2024-06-28 00:22:07,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:07,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882393839] [2024-06-28 00:22:07,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:07,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:08,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:08,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882393839] [2024-06-28 00:22:08,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882393839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:08,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:08,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:22:08,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240212412] [2024-06-28 00:22:08,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:08,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:22:08,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:08,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:22:08,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:22:08,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:22:08,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 279 transitions, 3781 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) [2024-06-28 00:22:08,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:08,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:22:08,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:08,719 INFO L124 PetriNetUnfolderBase]: 1721/3018 cut-off events. [2024-06-28 00:22:08,720 INFO L125 PetriNetUnfolderBase]: For 72282/72288 co-relation queries the response was YES. [2024-06-28 00:22:08,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17170 conditions, 3018 events. 1721/3018 cut-off events. For 72282/72288 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 19986 event pairs, 684 based on Foata normal form. 12/3018 useless extension candidates. Maximal degree in co-relation 17058. Up to 2558 conditions per place. [2024-06-28 00:22:08,750 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 255 selfloop transitions, 40 changer transitions 0/303 dead transitions. [2024-06-28 00:22:08,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 303 transitions, 4563 flow [2024-06-28 00:22:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:22:08,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:22:08,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-28 00:22:08,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-28 00:22:08,751 INFO L175 Difference]: Start difference. First operand has 259 places, 279 transitions, 3781 flow. Second operand 8 states and 153 transitions. [2024-06-28 00:22:08,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 303 transitions, 4563 flow [2024-06-28 00:22:09,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 303 transitions, 4426 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-28 00:22:09,011 INFO L231 Difference]: Finished difference. Result has 260 places, 283 transitions, 3793 flow [2024-06-28 00:22:09,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3644, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3793, PETRI_PLACES=260, PETRI_TRANSITIONS=283} [2024-06-28 00:22:09,011 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-28 00:22:09,011 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 283 transitions, 3793 flow [2024-06-28 00:22:09,012 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) [2024-06-28 00:22:09,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:09,012 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] [2024-06-28 00:22:09,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 00:22:09,012 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:09,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:09,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1209410918, now seen corresponding path program 7 times [2024-06-28 00:22:09,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:09,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301770737] [2024-06-28 00:22:09,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:09,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:10,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:10,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:10,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301770737] [2024-06-28 00:22:10,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301770737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:10,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:10,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:22:10,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468398403] [2024-06-28 00:22:10,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:10,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:22:10,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:10,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:22:10,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:22:10,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:22:10,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 283 transitions, 3793 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:10,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:10,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:22:10,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:10,975 INFO L124 PetriNetUnfolderBase]: 1729/3032 cut-off events. [2024-06-28 00:22:10,975 INFO L125 PetriNetUnfolderBase]: For 71993/71999 co-relation queries the response was YES. [2024-06-28 00:22:10,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17405 conditions, 3032 events. 1729/3032 cut-off events. For 71993/71999 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 20040 event pairs, 690 based on Foata normal form. 8/3028 useless extension candidates. Maximal degree in co-relation 17292. Up to 2662 conditions per place. [2024-06-28 00:22:11,004 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 258 selfloop transitions, 33 changer transitions 0/298 dead transitions. [2024-06-28 00:22:11,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 298 transitions, 4457 flow [2024-06-28 00:22:11,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:22:11,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:22:11,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-28 00:22:11,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-28 00:22:11,005 INFO L175 Difference]: Start difference. First operand has 260 places, 283 transitions, 3793 flow. Second operand 9 states and 148 transitions. [2024-06-28 00:22:11,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 298 transitions, 4457 flow [2024-06-28 00:22:11,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 298 transitions, 4412 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-28 00:22:11,242 INFO L231 Difference]: Finished difference. Result has 266 places, 285 transitions, 3873 flow [2024-06-28 00:22:11,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3748, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3873, PETRI_PLACES=266, PETRI_TRANSITIONS=285} [2024-06-28 00:22:11,242 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-28 00:22:11,242 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 285 transitions, 3873 flow [2024-06-28 00:22:11,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:11,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:11,242 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] [2024-06-28 00:22:11,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 00:22:11,242 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:11,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:11,243 INFO L85 PathProgramCache]: Analyzing trace with hash 981336788, now seen corresponding path program 8 times [2024-06-28 00:22:11,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:11,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255095787] [2024-06-28 00:22:11,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:11,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:12,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:12,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255095787] [2024-06-28 00:22:12,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255095787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:12,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:12,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:22:12,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739280848] [2024-06-28 00:22:12,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:12,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:22:12,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:12,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:22:12,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:22:12,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:22:12,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 285 transitions, 3873 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:12,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:12,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:22:12,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:13,218 INFO L124 PetriNetUnfolderBase]: 1756/3089 cut-off events. [2024-06-28 00:22:13,218 INFO L125 PetriNetUnfolderBase]: For 81614/81620 co-relation queries the response was YES. [2024-06-28 00:22:13,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17638 conditions, 3089 events. 1756/3089 cut-off events. For 81614/81620 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 20619 event pairs, 681 based on Foata normal form. 18/3095 useless extension candidates. Maximal degree in co-relation 17522. Up to 2616 conditions per place. [2024-06-28 00:22:13,248 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 251 selfloop transitions, 50 changer transitions 0/308 dead transitions. [2024-06-28 00:22:13,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 308 transitions, 4618 flow [2024-06-28 00:22:13,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:22:13,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:22:13,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-28 00:22:13,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-28 00:22:13,250 INFO L175 Difference]: Start difference. First operand has 266 places, 285 transitions, 3873 flow. Second operand 10 states and 168 transitions. [2024-06-28 00:22:13,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 308 transitions, 4618 flow [2024-06-28 00:22:13,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 308 transitions, 4539 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 00:22:13,494 INFO L231 Difference]: Finished difference. Result has 271 places, 288 transitions, 3972 flow [2024-06-28 00:22:13,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3798, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3972, PETRI_PLACES=271, PETRI_TRANSITIONS=288} [2024-06-28 00:22:13,494 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-28 00:22:13,494 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 288 transitions, 3972 flow [2024-06-28 00:22:13,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:13,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:13,495 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] [2024-06-28 00:22:13,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 00:22:13,495 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:13,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:13,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1209410732, now seen corresponding path program 8 times [2024-06-28 00:22:13,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:13,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152085290] [2024-06-28 00:22:13,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:13,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:14,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:14,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152085290] [2024-06-28 00:22:14,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152085290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:14,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:14,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:22:14,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322795427] [2024-06-28 00:22:14,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:14,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:22:14,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:14,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:22:14,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:22:14,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:22:14,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 288 transitions, 3972 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:14,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:14,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:22:14,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:15,050 INFO L124 PetriNetUnfolderBase]: 1755/3092 cut-off events. [2024-06-28 00:22:15,050 INFO L125 PetriNetUnfolderBase]: For 78269/78275 co-relation queries the response was YES. [2024-06-28 00:22:15,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17548 conditions, 3092 events. 1755/3092 cut-off events. For 78269/78275 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 20596 event pairs, 668 based on Foata normal form. 16/3096 useless extension candidates. Maximal degree in co-relation 17431. Up to 2640 conditions per place. [2024-06-28 00:22:15,082 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 263 selfloop transitions, 39 changer transitions 0/309 dead transitions. [2024-06-28 00:22:15,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 309 transitions, 4671 flow [2024-06-28 00:22:15,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:22:15,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:22:15,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-28 00:22:15,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-28 00:22:15,083 INFO L175 Difference]: Start difference. First operand has 271 places, 288 transitions, 3972 flow. Second operand 9 states and 154 transitions. [2024-06-28 00:22:15,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 309 transitions, 4671 flow [2024-06-28 00:22:15,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 309 transitions, 4534 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-28 00:22:15,336 INFO L231 Difference]: Finished difference. Result has 272 places, 290 transitions, 3966 flow [2024-06-28 00:22:15,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3843, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3966, PETRI_PLACES=272, PETRI_TRANSITIONS=290} [2024-06-28 00:22:15,337 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-28 00:22:15,337 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 290 transitions, 3966 flow [2024-06-28 00:22:15,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:15,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:15,337 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] [2024-06-28 00:22:15,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 00:22:15,337 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:15,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:15,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1348339125, now seen corresponding path program 1 times [2024-06-28 00:22:15,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:15,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376035532] [2024-06-28 00:22:15,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:15,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:16,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:16,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376035532] [2024-06-28 00:22:16,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376035532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:16,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:16,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:22:16,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872785653] [2024-06-28 00:22:16,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:16,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:22:16,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:16,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:22:16,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:22:16,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:22:16,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 290 transitions, 3966 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) [2024-06-28 00:22:16,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:16,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:22:16,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:16,803 INFO L124 PetriNetUnfolderBase]: 1775/3127 cut-off events. [2024-06-28 00:22:16,803 INFO L125 PetriNetUnfolderBase]: For 75606/75612 co-relation queries the response was YES. [2024-06-28 00:22:16,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17647 conditions, 3127 events. 1775/3127 cut-off events. For 75606/75612 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 20729 event pairs, 281 based on Foata normal form. 6/3116 useless extension candidates. Maximal degree in co-relation 17530. Up to 2114 conditions per place. [2024-06-28 00:22:16,835 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 218 selfloop transitions, 88 changer transitions 0/314 dead transitions. [2024-06-28 00:22:16,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 314 transitions, 4688 flow [2024-06-28 00:22:16,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:22:16,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:22:16,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-28 00:22:16,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-28 00:22:16,836 INFO L175 Difference]: Start difference. First operand has 272 places, 290 transitions, 3966 flow. Second operand 6 states and 130 transitions. [2024-06-28 00:22:16,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 314 transitions, 4688 flow [2024-06-28 00:22:17,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 314 transitions, 4596 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-28 00:22:17,115 INFO L231 Difference]: Finished difference. Result has 271 places, 291 transitions, 4084 flow [2024-06-28 00:22:17,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3874, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4084, PETRI_PLACES=271, PETRI_TRANSITIONS=291} [2024-06-28 00:22:17,116 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-28 00:22:17,116 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 291 transitions, 4084 flow [2024-06-28 00:22:17,116 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) [2024-06-28 00:22:17,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:17,116 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] [2024-06-28 00:22:17,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 00:22:17,116 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:17,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:17,116 INFO L85 PathProgramCache]: Analyzing trace with hash 79572383, now seen corresponding path program 1 times [2024-06-28 00:22:17,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:17,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833046029] [2024-06-28 00:22:17,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:17,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:17,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:17,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833046029] [2024-06-28 00:22:17,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833046029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:17,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:17,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:22:17,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974353220] [2024-06-28 00:22:17,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:17,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:22:17,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:17,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:22:17,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:22:17,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:22:17,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 291 transitions, 4084 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:17,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:17,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:22:17,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:18,831 INFO L124 PetriNetUnfolderBase]: 1883/3297 cut-off events. [2024-06-28 00:22:18,831 INFO L125 PetriNetUnfolderBase]: For 85631/85637 co-relation queries the response was YES. [2024-06-28 00:22:18,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19133 conditions, 3297 events. 1883/3297 cut-off events. For 85631/85637 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 21984 event pairs, 260 based on Foata normal form. 6/3285 useless extension candidates. Maximal degree in co-relation 19015. Up to 2264 conditions per place. [2024-06-28 00:22:18,862 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 230 selfloop transitions, 96 changer transitions 0/333 dead transitions. [2024-06-28 00:22:18,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 333 transitions, 5153 flow [2024-06-28 00:22:18,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:22:18,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:22:18,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 00:22:18,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-28 00:22:18,863 INFO L175 Difference]: Start difference. First operand has 271 places, 291 transitions, 4084 flow. Second operand 9 states and 163 transitions. [2024-06-28 00:22:18,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 333 transitions, 5153 flow [2024-06-28 00:22:19,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 333 transitions, 4959 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 00:22:19,155 INFO L231 Difference]: Finished difference. Result has 278 places, 307 transitions, 4446 flow [2024-06-28 00:22:19,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3912, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4446, PETRI_PLACES=278, PETRI_TRANSITIONS=307} [2024-06-28 00:22:19,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-28 00:22:19,156 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 307 transitions, 4446 flow [2024-06-28 00:22:19,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:19,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:19,156 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] [2024-06-28 00:22:19,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 00:22:19,156 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:19,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:19,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1560666539, now seen corresponding path program 2 times [2024-06-28 00:22:19,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:19,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135866813] [2024-06-28 00:22:19,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:19,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:20,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:20,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135866813] [2024-06-28 00:22:20,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135866813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:20,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:20,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:22:20,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100893787] [2024-06-28 00:22:20,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:20,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:22:20,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:20,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:22:20,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:22:20,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:22:20,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 307 transitions, 4446 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:20,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:20,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:22:20,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:21,252 INFO L124 PetriNetUnfolderBase]: 1992/3496 cut-off events. [2024-06-28 00:22:21,252 INFO L125 PetriNetUnfolderBase]: For 96522/96528 co-relation queries the response was YES. [2024-06-28 00:22:21,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20742 conditions, 3496 events. 1992/3496 cut-off events. For 96522/96528 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23693 event pairs, 255 based on Foata normal form. 6/3486 useless extension candidates. Maximal degree in co-relation 20620. Up to 2466 conditions per place. [2024-06-28 00:22:21,288 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 247 selfloop transitions, 94 changer transitions 0/348 dead transitions. [2024-06-28 00:22:21,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 348 transitions, 5481 flow [2024-06-28 00:22:21,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:22:21,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:22:21,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-28 00:22:21,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-28 00:22:21,289 INFO L175 Difference]: Start difference. First operand has 278 places, 307 transitions, 4446 flow. Second operand 10 states and 177 transitions. [2024-06-28 00:22:21,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 348 transitions, 5481 flow [2024-06-28 00:22:21,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 348 transitions, 5411 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 00:22:21,657 INFO L231 Difference]: Finished difference. Result has 287 places, 319 transitions, 4920 flow [2024-06-28 00:22:21,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4383, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4920, PETRI_PLACES=287, PETRI_TRANSITIONS=319} [2024-06-28 00:22:21,657 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-28 00:22:21,657 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 319 transitions, 4920 flow [2024-06-28 00:22:21,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:21,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:21,657 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] [2024-06-28 00:22:21,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 00:22:21,658 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:21,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:21,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1571883243, now seen corresponding path program 3 times [2024-06-28 00:22:21,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:21,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916516632] [2024-06-28 00:22:21,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:21,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:22,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:22,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916516632] [2024-06-28 00:22:22,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916516632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:22,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:22,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:22:22,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510867531] [2024-06-28 00:22:22,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:22,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:22:22,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:22,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:22:22,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:22:22,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:22:22,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 319 transitions, 4920 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:22,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:22,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:22:22,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:23,573 INFO L124 PetriNetUnfolderBase]: 1995/3491 cut-off events. [2024-06-28 00:22:23,573 INFO L125 PetriNetUnfolderBase]: For 104237/104243 co-relation queries the response was YES. [2024-06-28 00:22:23,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21396 conditions, 3491 events. 1995/3491 cut-off events. For 104237/104243 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 23593 event pairs, 238 based on Foata normal form. 12/3487 useless extension candidates. Maximal degree in co-relation 21269. Up to 2308 conditions per place. [2024-06-28 00:22:23,610 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 223 selfloop transitions, 117 changer transitions 0/347 dead transitions. [2024-06-28 00:22:23,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 347 transitions, 5681 flow [2024-06-28 00:22:23,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:22:23,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:22:23,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-28 00:22:23,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-28 00:22:23,611 INFO L175 Difference]: Start difference. First operand has 287 places, 319 transitions, 4920 flow. Second operand 10 states and 182 transitions. [2024-06-28 00:22:23,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 347 transitions, 5681 flow [2024-06-28 00:22:24,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 347 transitions, 5631 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-28 00:22:24,120 INFO L231 Difference]: Finished difference. Result has 292 places, 317 transitions, 5017 flow [2024-06-28 00:22:24,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4750, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5017, PETRI_PLACES=292, PETRI_TRANSITIONS=317} [2024-06-28 00:22:24,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-28 00:22:24,121 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 317 transitions, 5017 flow [2024-06-28 00:22:24,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:24,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:24,121 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] [2024-06-28 00:22:24,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 00:22:24,122 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:24,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:24,122 INFO L85 PathProgramCache]: Analyzing trace with hash -239671809, now seen corresponding path program 2 times [2024-06-28 00:22:24,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:24,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897514084] [2024-06-28 00:22:24,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:24,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:24,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:24,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897514084] [2024-06-28 00:22:24,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897514084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:24,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:24,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:22:24,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171182120] [2024-06-28 00:22:24,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:24,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:22:24,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:24,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:22:24,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:22:24,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:22:24,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 317 transitions, 5017 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) [2024-06-28 00:22:24,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:24,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:22:24,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:25,679 INFO L124 PetriNetUnfolderBase]: 2003/3509 cut-off events. [2024-06-28 00:22:25,679 INFO L125 PetriNetUnfolderBase]: For 98825/98831 co-relation queries the response was YES. [2024-06-28 00:22:25,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21990 conditions, 3509 events. 2003/3509 cut-off events. For 98825/98831 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 23820 event pairs, 284 based on Foata normal form. 2/3499 useless extension candidates. Maximal degree in co-relation 21863. Up to 2321 conditions per place. [2024-06-28 00:22:25,716 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 233 selfloop transitions, 105 changer transitions 0/346 dead transitions. [2024-06-28 00:22:25,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 346 transitions, 5909 flow [2024-06-28 00:22:25,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:22:25,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:22:25,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-28 00:22:25,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034013605442177 [2024-06-28 00:22:25,717 INFO L175 Difference]: Start difference. First operand has 292 places, 317 transitions, 5017 flow. Second operand 7 states and 148 transitions. [2024-06-28 00:22:25,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 346 transitions, 5909 flow [2024-06-28 00:22:26,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 346 transitions, 5684 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-28 00:22:26,217 INFO L231 Difference]: Finished difference. Result has 292 places, 319 transitions, 5051 flow [2024-06-28 00:22:26,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4792, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5051, PETRI_PLACES=292, PETRI_TRANSITIONS=319} [2024-06-28 00:22:26,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-28 00:22:26,218 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 319 transitions, 5051 flow [2024-06-28 00:22:26,218 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) [2024-06-28 00:22:26,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:26,218 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] [2024-06-28 00:22:26,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 00:22:26,218 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:26,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:26,219 INFO L85 PathProgramCache]: Analyzing trace with hash -239372907, now seen corresponding path program 1 times [2024-06-28 00:22:26,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:26,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917648515] [2024-06-28 00:22:26,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:26,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:26,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:27,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:27,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917648515] [2024-06-28 00:22:27,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917648515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:27,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:27,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:22:27,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614273976] [2024-06-28 00:22:27,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:27,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:22:27,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:27,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:22:27,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:22:27,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:22:27,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 319 transitions, 5051 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) [2024-06-28 00:22:27,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:27,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:22:27,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:28,634 INFO L124 PetriNetUnfolderBase]: 2065/3597 cut-off events. [2024-06-28 00:22:28,635 INFO L125 PetriNetUnfolderBase]: For 107521/107531 co-relation queries the response was YES. [2024-06-28 00:22:28,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22754 conditions, 3597 events. 2065/3597 cut-off events. For 107521/107531 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 24427 event pairs, 595 based on Foata normal form. 9/3583 useless extension candidates. Maximal degree in co-relation 22628. Up to 2932 conditions per place. [2024-06-28 00:22:28,674 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 128 changer transitions 0/386 dead transitions. [2024-06-28 00:22:28,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 386 transitions, 6593 flow [2024-06-28 00:22:28,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:22:28,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:22:28,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-28 00:22:28,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-28 00:22:28,675 INFO L175 Difference]: Start difference. First operand has 292 places, 319 transitions, 5051 flow. Second operand 9 states and 180 transitions. [2024-06-28 00:22:28,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 386 transitions, 6593 flow [2024-06-28 00:22:29,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 386 transitions, 6394 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 00:22:29,197 INFO L231 Difference]: Finished difference. Result has 301 places, 359 transitions, 5896 flow [2024-06-28 00:22:29,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4870, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5896, PETRI_PLACES=301, PETRI_TRANSITIONS=359} [2024-06-28 00:22:29,198 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-28 00:22:29,198 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 359 transitions, 5896 flow [2024-06-28 00:22:29,198 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) [2024-06-28 00:22:29,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:29,198 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] [2024-06-28 00:22:29,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 00:22:29,199 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:29,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:29,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1361117401, now seen corresponding path program 3 times [2024-06-28 00:22:29,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:29,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260711287] [2024-06-28 00:22:29,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:29,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:30,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:30,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260711287] [2024-06-28 00:22:30,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260711287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:30,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:30,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:22:30,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502056934] [2024-06-28 00:22:30,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:30,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:22:30,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:30,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:22:30,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:22:30,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:22:30,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 359 transitions, 5896 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) [2024-06-28 00:22:30,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:30,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:22:30,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:31,091 INFO L124 PetriNetUnfolderBase]: 2073/3611 cut-off events. [2024-06-28 00:22:31,091 INFO L125 PetriNetUnfolderBase]: For 112532/112538 co-relation queries the response was YES. [2024-06-28 00:22:31,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23350 conditions, 3611 events. 2073/3611 cut-off events. For 112532/112538 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 24335 event pairs, 270 based on Foata normal form. 2/3600 useless extension candidates. Maximal degree in co-relation 23219. Up to 2358 conditions per place. [2024-06-28 00:22:31,127 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 261 selfloop transitions, 119 changer transitions 0/388 dead transitions. [2024-06-28 00:22:31,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 388 transitions, 7030 flow [2024-06-28 00:22:31,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:22:31,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:22:31,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-28 00:22:31,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2024-06-28 00:22:31,128 INFO L175 Difference]: Start difference. First operand has 301 places, 359 transitions, 5896 flow. Second operand 7 states and 146 transitions. [2024-06-28 00:22:31,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 388 transitions, 7030 flow [2024-06-28 00:22:31,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 388 transitions, 6890 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-06-28 00:22:31,687 INFO L231 Difference]: Finished difference. Result has 307 places, 364 transitions, 6131 flow [2024-06-28 00:22:31,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5756, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6131, PETRI_PLACES=307, PETRI_TRANSITIONS=364} [2024-06-28 00:22:31,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-28 00:22:31,687 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 364 transitions, 6131 flow [2024-06-28 00:22:31,687 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) [2024-06-28 00:22:31,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:31,688 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] [2024-06-28 00:22:31,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 00:22:31,688 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:31,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:31,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1366778311, now seen corresponding path program 4 times [2024-06-28 00:22:31,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:31,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181990069] [2024-06-28 00:22:31,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:31,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:32,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:32,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181990069] [2024-06-28 00:22:32,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181990069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:32,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:32,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:22:32,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902171136] [2024-06-28 00:22:32,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:32,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:22:32,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:32,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:22:32,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:22:32,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:22:32,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 364 transitions, 6131 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) [2024-06-28 00:22:32,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:32,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:22:32,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:33,403 INFO L124 PetriNetUnfolderBase]: 2068/3592 cut-off events. [2024-06-28 00:22:33,404 INFO L125 PetriNetUnfolderBase]: For 114178/114184 co-relation queries the response was YES. [2024-06-28 00:22:33,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23712 conditions, 3592 events. 2068/3592 cut-off events. For 114178/114184 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 24094 event pairs, 291 based on Foata normal form. 2/3581 useless extension candidates. Maximal degree in co-relation 23578. Up to 2652 conditions per place. [2024-06-28 00:22:33,442 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 300 selfloop transitions, 84 changer transitions 0/392 dead transitions. [2024-06-28 00:22:33,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 392 transitions, 7108 flow [2024-06-28 00:22:33,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:22:33,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:22:33,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-28 00:22:33,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2024-06-28 00:22:33,444 INFO L175 Difference]: Start difference. First operand has 307 places, 364 transitions, 6131 flow. Second operand 7 states and 146 transitions. [2024-06-28 00:22:33,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 392 transitions, 7108 flow [2024-06-28 00:22:34,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 392 transitions, 6853 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-28 00:22:34,008 INFO L231 Difference]: Finished difference. Result has 311 places, 365 transitions, 6078 flow [2024-06-28 00:22:34,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5888, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6078, PETRI_PLACES=311, PETRI_TRANSITIONS=365} [2024-06-28 00:22:34,009 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-28 00:22:34,009 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 365 transitions, 6078 flow [2024-06-28 00:22:34,009 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) [2024-06-28 00:22:34,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:34,009 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] [2024-06-28 00:22:34,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 00:22:34,009 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:34,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:34,009 INFO L85 PathProgramCache]: Analyzing trace with hash -244914219, now seen corresponding path program 5 times [2024-06-28 00:22:34,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:34,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58089875] [2024-06-28 00:22:34,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:34,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:34,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:34,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58089875] [2024-06-28 00:22:34,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58089875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:34,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:34,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:22:34,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610521402] [2024-06-28 00:22:34,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:34,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:22:34,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:34,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:22:34,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:22:34,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:22:34,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 365 transitions, 6078 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:34,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:34,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:22:34,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:35,393 INFO L124 PetriNetUnfolderBase]: 2084/3626 cut-off events. [2024-06-28 00:22:35,393 INFO L125 PetriNetUnfolderBase]: For 115999/116005 co-relation queries the response was YES. [2024-06-28 00:22:35,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23868 conditions, 3626 events. 2084/3626 cut-off events. For 115999/116005 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 24468 event pairs, 297 based on Foata normal form. 2/3612 useless extension candidates. Maximal degree in co-relation 23731. Up to 2891 conditions per place. [2024-06-28 00:22:35,430 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 342 selfloop transitions, 43 changer transitions 0/392 dead transitions. [2024-06-28 00:22:35,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 392 transitions, 6962 flow [2024-06-28 00:22:35,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:22:35,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:22:35,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 00:22:35,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 00:22:35,431 INFO L175 Difference]: Start difference. First operand has 311 places, 365 transitions, 6078 flow. Second operand 8 states and 144 transitions. [2024-06-28 00:22:35,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 392 transitions, 6962 flow [2024-06-28 00:22:35,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 392 transitions, 6633 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 00:22:35,993 INFO L231 Difference]: Finished difference. Result has 314 places, 369 transitions, 5901 flow [2024-06-28 00:22:35,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5765, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5901, PETRI_PLACES=314, PETRI_TRANSITIONS=369} [2024-06-28 00:22:35,993 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-28 00:22:35,993 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 369 transitions, 5901 flow [2024-06-28 00:22:35,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:35,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:35,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:22:35,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 00:22:35,993 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:35,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:35,994 INFO L85 PathProgramCache]: Analyzing trace with hash -244914033, now seen corresponding path program 4 times [2024-06-28 00:22:35,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:35,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986425787] [2024-06-28 00:22:35,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:35,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:37,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:37,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986425787] [2024-06-28 00:22:37,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986425787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:37,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:37,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:22:37,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185659111] [2024-06-28 00:22:37,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:37,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:22:37,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:37,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:22:37,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:22:37,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:22:37,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 369 transitions, 5901 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:37,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:37,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:22:37,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:38,143 INFO L124 PetriNetUnfolderBase]: 2242/3916 cut-off events. [2024-06-28 00:22:38,143 INFO L125 PetriNetUnfolderBase]: For 143100/143106 co-relation queries the response was YES. [2024-06-28 00:22:38,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25403 conditions, 3916 events. 2242/3916 cut-off events. For 143100/143106 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 26961 event pairs, 279 based on Foata normal form. 6/3903 useless extension candidates. Maximal degree in co-relation 25264. Up to 2570 conditions per place. [2024-06-28 00:22:38,186 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 304 selfloop transitions, 118 changer transitions 0/429 dead transitions. [2024-06-28 00:22:38,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 429 transitions, 7305 flow [2024-06-28 00:22:38,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 00:22:38,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 00:22:38,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 237 transitions. [2024-06-28 00:22:38,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4030612244897959 [2024-06-28 00:22:38,187 INFO L175 Difference]: Start difference. First operand has 314 places, 369 transitions, 5901 flow. Second operand 14 states and 237 transitions. [2024-06-28 00:22:38,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 429 transitions, 7305 flow [2024-06-28 00:22:38,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 429 transitions, 7188 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 00:22:38,807 INFO L231 Difference]: Finished difference. Result has 326 places, 383 transitions, 6530 flow [2024-06-28 00:22:38,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5784, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6530, PETRI_PLACES=326, PETRI_TRANSITIONS=383} [2024-06-28 00:22:38,808 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-28 00:22:38,808 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 383 transitions, 6530 flow [2024-06-28 00:22:38,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:38,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:38,808 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] [2024-06-28 00:22:38,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 00:22:38,808 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:38,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:38,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1357403911, now seen corresponding path program 6 times [2024-06-28 00:22:38,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:38,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266394591] [2024-06-28 00:22:38,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:38,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:39,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:39,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266394591] [2024-06-28 00:22:39,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266394591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:39,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:39,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:22:39,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576072886] [2024-06-28 00:22:39,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:39,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:22:39,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:39,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:22:39,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:22:39,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:22:39,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 383 transitions, 6530 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:39,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:39,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:22:39,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:41,212 INFO L124 PetriNetUnfolderBase]: 2465/4297 cut-off events. [2024-06-28 00:22:41,212 INFO L125 PetriNetUnfolderBase]: For 149920/149930 co-relation queries the response was YES. [2024-06-28 00:22:41,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29217 conditions, 4297 events. 2465/4297 cut-off events. For 149920/149930 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 30113 event pairs, 301 based on Foata normal form. 12/4302 useless extension candidates. Maximal degree in co-relation 29075. Up to 3097 conditions per place. [2024-06-28 00:22:41,263 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 345 selfloop transitions, 126 changer transitions 0/478 dead transitions. [2024-06-28 00:22:41,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 478 transitions, 8727 flow [2024-06-28 00:22:41,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:22:41,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:22:41,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-28 00:22:41,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-28 00:22:41,264 INFO L175 Difference]: Start difference. First operand has 326 places, 383 transitions, 6530 flow. Second operand 10 states and 186 transitions. [2024-06-28 00:22:41,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 478 transitions, 8727 flow [2024-06-28 00:22:42,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 478 transitions, 8358 flow, removed 132 selfloop flow, removed 7 redundant places. [2024-06-28 00:22:42,252 INFO L231 Difference]: Finished difference. Result has 333 places, 432 transitions, 7506 flow [2024-06-28 00:22:42,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6202, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7506, PETRI_PLACES=333, PETRI_TRANSITIONS=432} [2024-06-28 00:22:42,253 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-28 00:22:42,253 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 432 transitions, 7506 flow [2024-06-28 00:22:42,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:42,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:42,253 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] [2024-06-28 00:22:42,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 00:22:42,253 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:42,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:42,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1677756783, now seen corresponding path program 5 times [2024-06-28 00:22:42,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:42,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342335248] [2024-06-28 00:22:42,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:42,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:43,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:43,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342335248] [2024-06-28 00:22:43,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342335248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:43,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:43,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:22:43,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123305190] [2024-06-28 00:22:43,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:43,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:22:43,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:43,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:22:43,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:22:43,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:22:43,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 432 transitions, 7506 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:43,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:43,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:22:43,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:44,567 INFO L124 PetriNetUnfolderBase]: 2624/4599 cut-off events. [2024-06-28 00:22:44,567 INFO L125 PetriNetUnfolderBase]: For 149693/149699 co-relation queries the response was YES. [2024-06-28 00:22:44,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31082 conditions, 4599 events. 2624/4599 cut-off events. For 149693/149699 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 32593 event pairs, 287 based on Foata normal form. 12/4584 useless extension candidates. Maximal degree in co-relation 30935. Up to 2546 conditions per place. [2024-06-28 00:22:44,625 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 278 selfloop transitions, 199 changer transitions 0/484 dead transitions. [2024-06-28 00:22:44,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 484 transitions, 8961 flow [2024-06-28 00:22:44,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 00:22:44,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 00:22:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 223 transitions. [2024-06-28 00:22:44,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4084249084249084 [2024-06-28 00:22:44,626 INFO L175 Difference]: Start difference. First operand has 333 places, 432 transitions, 7506 flow. Second operand 13 states and 223 transitions. [2024-06-28 00:22:44,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 484 transitions, 8961 flow [2024-06-28 00:22:45,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 484 transitions, 8772 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-28 00:22:45,617 INFO L231 Difference]: Finished difference. Result has 339 places, 441 transitions, 7828 flow [2024-06-28 00:22:45,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7320, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7828, PETRI_PLACES=339, PETRI_TRANSITIONS=441} [2024-06-28 00:22:45,618 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-28 00:22:45,618 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 441 transitions, 7828 flow [2024-06-28 00:22:45,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:45,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:45,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:22:45,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 00:22:45,619 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:45,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:45,619 INFO L85 PathProgramCache]: Analyzing trace with hash -235653837, now seen corresponding path program 2 times [2024-06-28 00:22:45,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:45,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090456588] [2024-06-28 00:22:45,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:45,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:46,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:46,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090456588] [2024-06-28 00:22:46,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090456588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:46,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:46,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:22:46,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614150559] [2024-06-28 00:22:46,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:46,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:22:46,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:46,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:22:46,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:22:46,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:22:46,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 441 transitions, 7828 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:46,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:46,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:22:46,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:47,575 INFO L124 PetriNetUnfolderBase]: 2642/4636 cut-off events. [2024-06-28 00:22:47,575 INFO L125 PetriNetUnfolderBase]: For 155768/155784 co-relation queries the response was YES. [2024-06-28 00:22:47,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32024 conditions, 4636 events. 2642/4636 cut-off events. For 155768/155784 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 33215 event pairs, 703 based on Foata normal form. 15/4611 useless extension candidates. Maximal degree in co-relation 31880. Up to 3764 conditions per place. [2024-06-28 00:22:47,636 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 323 selfloop transitions, 145 changer transitions 0/475 dead transitions. [2024-06-28 00:22:47,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 475 transitions, 9087 flow [2024-06-28 00:22:47,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:22:47,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:22:47,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 207 transitions. [2024-06-28 00:22:47,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-28 00:22:47,637 INFO L175 Difference]: Start difference. First operand has 339 places, 441 transitions, 7828 flow. Second operand 12 states and 207 transitions. [2024-06-28 00:22:47,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 475 transitions, 9087 flow [2024-06-28 00:22:48,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 475 transitions, 8893 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-28 00:22:48,470 INFO L231 Difference]: Finished difference. Result has 345 places, 448 transitions, 8099 flow [2024-06-28 00:22:48,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7634, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8099, PETRI_PLACES=345, PETRI_TRANSITIONS=448} [2024-06-28 00:22:48,470 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-28 00:22:48,471 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 448 transitions, 8099 flow [2024-06-28 00:22:48,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:48,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:48,471 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] [2024-06-28 00:22:48,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 00:22:48,471 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:48,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:48,471 INFO L85 PathProgramCache]: Analyzing trace with hash -235648443, now seen corresponding path program 6 times [2024-06-28 00:22:48,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:48,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459034886] [2024-06-28 00:22:48,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:48,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:49,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:49,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459034886] [2024-06-28 00:22:49,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459034886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:49,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:49,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:22:49,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040430711] [2024-06-28 00:22:49,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:49,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:22:49,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:49,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:22:49,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:22:49,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:22:49,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 448 transitions, 8099 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:49,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:49,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:22:49,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:50,516 INFO L124 PetriNetUnfolderBase]: 2612/4571 cut-off events. [2024-06-28 00:22:50,516 INFO L125 PetriNetUnfolderBase]: For 156003/156009 co-relation queries the response was YES. [2024-06-28 00:22:50,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31728 conditions, 4571 events. 2612/4571 cut-off events. For 156003/156009 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 32393 event pairs, 276 based on Foata normal form. 12/4558 useless extension candidates. Maximal degree in co-relation 31582. Up to 2556 conditions per place. [2024-06-28 00:22:50,572 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 280 selfloop transitions, 194 changer transitions 0/481 dead transitions. [2024-06-28 00:22:50,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 481 transitions, 9297 flow [2024-06-28 00:22:50,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:22:50,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:22:50,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-28 00:22:50,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41774891774891776 [2024-06-28 00:22:50,573 INFO L175 Difference]: Start difference. First operand has 345 places, 448 transitions, 8099 flow. Second operand 11 states and 193 transitions. [2024-06-28 00:22:50,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 481 transitions, 9297 flow [2024-06-28 00:22:51,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 481 transitions, 8962 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-28 00:22:51,402 INFO L231 Difference]: Finished difference. Result has 347 places, 447 transitions, 8157 flow [2024-06-28 00:22:51,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7757, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8157, PETRI_PLACES=347, PETRI_TRANSITIONS=447} [2024-06-28 00:22:51,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-28 00:22:51,403 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 447 transitions, 8157 flow [2024-06-28 00:22:51,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:51,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:51,403 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] [2024-06-28 00:22:51,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 00:22:51,403 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:51,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:51,404 INFO L85 PathProgramCache]: Analyzing trace with hash -235648257, now seen corresponding path program 3 times [2024-06-28 00:22:51,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:51,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449169313] [2024-06-28 00:22:51,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:51,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:52,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:52,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:52,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449169313] [2024-06-28 00:22:52,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449169313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:52,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:52,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:22:52,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95271222] [2024-06-28 00:22:52,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:52,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:22:52,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:52,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:22:52,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:22:52,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:22:52,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 447 transitions, 8157 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:52,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:52,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:22:52,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:53,132 INFO L124 PetriNetUnfolderBase]: 2617/4602 cut-off events. [2024-06-28 00:22:53,132 INFO L125 PetriNetUnfolderBase]: For 154225/154241 co-relation queries the response was YES. [2024-06-28 00:22:53,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32368 conditions, 4602 events. 2617/4602 cut-off events. For 154225/154241 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 32970 event pairs, 704 based on Foata normal form. 15/4580 useless extension candidates. Maximal degree in co-relation 32221. Up to 3947 conditions per place. [2024-06-28 00:22:53,188 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 407 selfloop transitions, 55 changer transitions 0/469 dead transitions. [2024-06-28 00:22:53,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 469 transitions, 9212 flow [2024-06-28 00:22:53,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:22:53,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:22:53,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-28 00:22:53,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-28 00:22:53,189 INFO L175 Difference]: Start difference. First operand has 347 places, 447 transitions, 8157 flow. Second operand 9 states and 154 transitions. [2024-06-28 00:22:53,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 469 transitions, 9212 flow [2024-06-28 00:22:53,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 469 transitions, 8824 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-28 00:22:53,992 INFO L231 Difference]: Finished difference. Result has 347 places, 451 transitions, 7973 flow [2024-06-28 00:22:53,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7769, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7973, PETRI_PLACES=347, PETRI_TRANSITIONS=451} [2024-06-28 00:22:53,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-28 00:22:53,992 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 451 transitions, 7973 flow [2024-06-28 00:22:53,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:53,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:53,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:22:53,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 00:22:53,993 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:53,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:53,993 INFO L85 PathProgramCache]: Analyzing trace with hash 956731151, now seen corresponding path program 7 times [2024-06-28 00:22:53,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:53,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121266275] [2024-06-28 00:22:53,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:53,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:54,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:54,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121266275] [2024-06-28 00:22:54,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121266275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:54,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:54,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:22:54,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806584575] [2024-06-28 00:22:54,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:54,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:22:54,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:54,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:22:54,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:22:54,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:22:54,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 451 transitions, 7973 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:54,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:54,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:22:54,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:56,193 INFO L124 PetriNetUnfolderBase]: 2600/4555 cut-off events. [2024-06-28 00:22:56,194 INFO L125 PetriNetUnfolderBase]: For 152156/152162 co-relation queries the response was YES. [2024-06-28 00:22:56,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31518 conditions, 4555 events. 2600/4555 cut-off events. For 152156/152162 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 32287 event pairs, 362 based on Foata normal form. 6/4518 useless extension candidates. Maximal degree in co-relation 31369. Up to 3637 conditions per place. [2024-06-28 00:22:56,249 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 419 selfloop transitions, 52 changer transitions 0/478 dead transitions. [2024-06-28 00:22:56,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 478 transitions, 9074 flow [2024-06-28 00:22:56,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:22:56,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:22:56,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 00:22:56,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 00:22:56,250 INFO L175 Difference]: Start difference. First operand has 347 places, 451 transitions, 7973 flow. Second operand 9 states and 153 transitions. [2024-06-28 00:22:56,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 478 transitions, 9074 flow [2024-06-28 00:22:57,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 478 transitions, 8943 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-28 00:22:57,123 INFO L231 Difference]: Finished difference. Result has 348 places, 449 transitions, 7947 flow [2024-06-28 00:22:57,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7811, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7947, PETRI_PLACES=348, PETRI_TRANSITIONS=449} [2024-06-28 00:22:57,123 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-28 00:22:57,124 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 449 transitions, 7947 flow [2024-06-28 00:22:57,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:57,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:57,124 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] [2024-06-28 00:22:57,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 00:22:57,124 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:57,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:57,124 INFO L85 PathProgramCache]: Analyzing trace with hash 801906797, now seen corresponding path program 8 times [2024-06-28 00:22:57,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:57,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499058786] [2024-06-28 00:22:57,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:57,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:58,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:58,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499058786] [2024-06-28 00:22:58,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499058786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:58,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:58,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:22:58,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324955932] [2024-06-28 00:22:58,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:58,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:22:58,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:58,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:22:58,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:22:58,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:22:58,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 449 transitions, 7947 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:58,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:58,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:22:58,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:59,427 INFO L124 PetriNetUnfolderBase]: 2640/4637 cut-off events. [2024-06-28 00:22:59,427 INFO L125 PetriNetUnfolderBase]: For 164728/164771 co-relation queries the response was YES. [2024-06-28 00:22:59,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31716 conditions, 4637 events. 2640/4637 cut-off events. For 164728/164771 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 33114 event pairs, 364 based on Foata normal form. 35/4646 useless extension candidates. Maximal degree in co-relation 31568. Up to 2577 conditions per place. [2024-06-28 00:22:59,485 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 291 selfloop transitions, 176 changer transitions 0/474 dead transitions. [2024-06-28 00:22:59,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 474 transitions, 9109 flow [2024-06-28 00:22:59,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:22:59,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:22:59,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 00:22:59,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-28 00:22:59,486 INFO L175 Difference]: Start difference. First operand has 348 places, 449 transitions, 7947 flow. Second operand 8 states and 147 transitions. [2024-06-28 00:22:59,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 474 transitions, 9109 flow [2024-06-28 00:23:00,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 474 transitions, 8850 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-28 00:23:00,399 INFO L231 Difference]: Finished difference. Result has 349 places, 451 transitions, 8071 flow [2024-06-28 00:23:00,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7688, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8071, PETRI_PLACES=349, PETRI_TRANSITIONS=451} [2024-06-28 00:23:00,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-28 00:23:00,400 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 451 transitions, 8071 flow [2024-06-28 00:23:00,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:00,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:00,400 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] [2024-06-28 00:23:00,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 00:23:00,400 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:00,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:00,401 INFO L85 PathProgramCache]: Analyzing trace with hash 801906983, now seen corresponding path program 4 times [2024-06-28 00:23:00,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:00,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048088664] [2024-06-28 00:23:00,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:00,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:01,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:01,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048088664] [2024-06-28 00:23:01,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048088664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:01,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:01,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:23:01,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140134328] [2024-06-28 00:23:01,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:01,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:23:01,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:01,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:23:01,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:23:01,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:23:01,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 451 transitions, 8071 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:01,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:01,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:23:01,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:02,129 INFO L124 PetriNetUnfolderBase]: 2645/4658 cut-off events. [2024-06-28 00:23:02,129 INFO L125 PetriNetUnfolderBase]: For 161442/161491 co-relation queries the response was YES. [2024-06-28 00:23:02,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32234 conditions, 4658 events. 2645/4658 cut-off events. For 161442/161491 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 33517 event pairs, 723 based on Foata normal form. 40/4658 useless extension candidates. Maximal degree in co-relation 32085. Up to 3946 conditions per place. [2024-06-28 00:23:02,187 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 379 selfloop transitions, 84 changer transitions 0/470 dead transitions. [2024-06-28 00:23:02,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 470 transitions, 9128 flow [2024-06-28 00:23:02,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:23:02,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:23:02,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 00:23:02,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 00:23:02,188 INFO L175 Difference]: Start difference. First operand has 349 places, 451 transitions, 8071 flow. Second operand 9 states and 153 transitions. [2024-06-28 00:23:02,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 470 transitions, 9128 flow [2024-06-28 00:23:03,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 470 transitions, 8890 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 00:23:03,037 INFO L231 Difference]: Finished difference. Result has 353 places, 457 transitions, 8141 flow [2024-06-28 00:23:03,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7833, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8141, PETRI_PLACES=353, PETRI_TRANSITIONS=457} [2024-06-28 00:23:03,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-28 00:23:03,038 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 457 transitions, 8141 flow [2024-06-28 00:23:03,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:03,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:03,038 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] [2024-06-28 00:23:03,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 00:23:03,038 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:03,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:03,038 INFO L85 PathProgramCache]: Analyzing trace with hash 960450221, now seen corresponding path program 9 times [2024-06-28 00:23:03,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:03,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650411423] [2024-06-28 00:23:03,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:03,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:04,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:04,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650411423] [2024-06-28 00:23:04,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650411423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:04,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:04,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:23:04,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911703976] [2024-06-28 00:23:04,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:04,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:23:04,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:04,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:23:04,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:23:04,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:23:04,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 457 transitions, 8141 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:04,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:04,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:23:04,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:05,452 INFO L124 PetriNetUnfolderBase]: 2685/4730 cut-off events. [2024-06-28 00:23:05,453 INFO L125 PetriNetUnfolderBase]: For 172791/172834 co-relation queries the response was YES. [2024-06-28 00:23:05,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32004 conditions, 4730 events. 2685/4730 cut-off events. For 172791/172834 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 34005 event pairs, 378 based on Foata normal form. 35/4730 useless extension candidates. Maximal degree in co-relation 31855. Up to 2608 conditions per place. [2024-06-28 00:23:05,514 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 284 selfloop transitions, 200 changer transitions 0/491 dead transitions. [2024-06-28 00:23:05,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 491 transitions, 9491 flow [2024-06-28 00:23:05,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:23:05,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:23:05,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 203 transitions. [2024-06-28 00:23:05,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-28 00:23:05,516 INFO L175 Difference]: Start difference. First operand has 353 places, 457 transitions, 8141 flow. Second operand 12 states and 203 transitions. [2024-06-28 00:23:05,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 491 transitions, 9491 flow [2024-06-28 00:23:06,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 491 transitions, 9382 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-28 00:23:06,590 INFO L231 Difference]: Finished difference. Result has 361 places, 459 transitions, 8465 flow [2024-06-28 00:23:06,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8034, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8465, PETRI_PLACES=361, PETRI_TRANSITIONS=459} [2024-06-28 00:23:06,590 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-28 00:23:06,590 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 459 transitions, 8465 flow [2024-06-28 00:23:06,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:06,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:06,591 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] [2024-06-28 00:23:06,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 00:23:06,591 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:06,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:06,591 INFO L85 PathProgramCache]: Analyzing trace with hash 960450035, now seen corresponding path program 7 times [2024-06-28 00:23:06,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:06,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151035567] [2024-06-28 00:23:06,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:06,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:07,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:07,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151035567] [2024-06-28 00:23:07,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151035567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:07,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:07,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:23:07,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381203264] [2024-06-28 00:23:07,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:07,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:23:07,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:07,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:23:07,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:23:07,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:23:07,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 459 transitions, 8465 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:07,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:07,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:23:07,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:08,242 INFO L124 PetriNetUnfolderBase]: 2693/4728 cut-off events. [2024-06-28 00:23:08,243 INFO L125 PetriNetUnfolderBase]: For 174606/174649 co-relation queries the response was YES. [2024-06-28 00:23:08,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33059 conditions, 4728 events. 2693/4728 cut-off events. For 174606/174649 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 33878 event pairs, 476 based on Foata normal form. 25/4718 useless extension candidates. Maximal degree in co-relation 32908. Up to 3437 conditions per place. [2024-06-28 00:23:08,303 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 335 selfloop transitions, 134 changer transitions 0/476 dead transitions. [2024-06-28 00:23:08,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 476 transitions, 9468 flow [2024-06-28 00:23:08,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:23:08,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:23:08,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-28 00:23:08,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-28 00:23:08,304 INFO L175 Difference]: Start difference. First operand has 361 places, 459 transitions, 8465 flow. Second operand 9 states and 150 transitions. [2024-06-28 00:23:08,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 476 transitions, 9468 flow [2024-06-28 00:23:09,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 476 transitions, 8836 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-28 00:23:09,363 INFO L231 Difference]: Finished difference. Result has 359 places, 461 transitions, 8139 flow [2024-06-28 00:23:09,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7833, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8139, PETRI_PLACES=359, PETRI_TRANSITIONS=461} [2024-06-28 00:23:09,364 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-28 00:23:09,364 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 461 transitions, 8139 flow [2024-06-28 00:23:09,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:09,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:09,364 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] [2024-06-28 00:23:09,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 00:23:09,365 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:09,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:09,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1218853663, now seen corresponding path program 5 times [2024-06-28 00:23:09,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:09,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652990919] [2024-06-28 00:23:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:09,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:10,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:10,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652990919] [2024-06-28 00:23:10,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652990919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:10,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:10,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:23:10,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266142331] [2024-06-28 00:23:10,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:10,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:23:10,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:10,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:23:10,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:23:10,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:23:10,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 461 transitions, 8139 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:10,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:10,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:23:10,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:11,143 INFO L124 PetriNetUnfolderBase]: 2698/4753 cut-off events. [2024-06-28 00:23:11,143 INFO L125 PetriNetUnfolderBase]: For 171945/171994 co-relation queries the response was YES. [2024-06-28 00:23:11,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32180 conditions, 4753 events. 2698/4753 cut-off events. For 171945/171994 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 34498 event pairs, 739 based on Foata normal form. 40/4744 useless extension candidates. Maximal degree in co-relation 32029. Up to 4029 conditions per place. [2024-06-28 00:23:11,201 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 392 selfloop transitions, 78 changer transitions 0/477 dead transitions. [2024-06-28 00:23:11,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 477 transitions, 9187 flow [2024-06-28 00:23:11,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:23:11,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:23:11,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 00:23:11,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 00:23:11,202 INFO L175 Difference]: Start difference. First operand has 359 places, 461 transitions, 8139 flow. Second operand 8 states and 144 transitions. [2024-06-28 00:23:11,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 477 transitions, 9187 flow [2024-06-28 00:23:12,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 477 transitions, 8908 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 00:23:12,388 INFO L231 Difference]: Finished difference. Result has 360 places, 464 transitions, 8096 flow [2024-06-28 00:23:12,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7860, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8096, PETRI_PLACES=360, PETRI_TRANSITIONS=464} [2024-06-28 00:23:12,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-28 00:23:12,388 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 464 transitions, 8096 flow [2024-06-28 00:23:12,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:12,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:12,388 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] [2024-06-28 00:23:12,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 00:23:12,389 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:12,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:12,389 INFO L85 PathProgramCache]: Analyzing trace with hash 794555147, now seen corresponding path program 10 times [2024-06-28 00:23:12,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:12,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391833272] [2024-06-28 00:23:12,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:12,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:13,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:13,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:13,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391833272] [2024-06-28 00:23:13,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391833272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:13,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:13,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:23:13,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426844603] [2024-06-28 00:23:13,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:13,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:23:13,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:13,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:23:13,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:23:13,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:23:13,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 464 transitions, 8096 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:13,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:13,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:23:13,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:14,600 INFO L124 PetriNetUnfolderBase]: 2668/4693 cut-off events. [2024-06-28 00:23:14,601 INFO L125 PetriNetUnfolderBase]: For 173254/173297 co-relation queries the response was YES. [2024-06-28 00:23:14,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31339 conditions, 4693 events. 2668/4693 cut-off events. For 173254/173297 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 33631 event pairs, 374 based on Foata normal form. 35/4699 useless extension candidates. Maximal degree in co-relation 31187. Up to 2611 conditions per place. [2024-06-28 00:23:14,661 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 292 selfloop transitions, 192 changer transitions 0/491 dead transitions. [2024-06-28 00:23:14,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 491 transitions, 9284 flow [2024-06-28 00:23:14,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:23:14,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:23:14,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-28 00:23:14,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41125541125541126 [2024-06-28 00:23:14,662 INFO L175 Difference]: Start difference. First operand has 360 places, 464 transitions, 8096 flow. Second operand 11 states and 190 transitions. [2024-06-28 00:23:14,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 491 transitions, 9284 flow [2024-06-28 00:23:15,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 491 transitions, 9126 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-28 00:23:15,883 INFO L231 Difference]: Finished difference. Result has 365 places, 461 transitions, 8310 flow [2024-06-28 00:23:15,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7916, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8310, PETRI_PLACES=365, PETRI_TRANSITIONS=461} [2024-06-28 00:23:15,883 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-28 00:23:15,883 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 461 transitions, 8310 flow [2024-06-28 00:23:15,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:15,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:15,884 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] [2024-06-28 00:23:15,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 00:23:15,884 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:15,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:15,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1213507429, now seen corresponding path program 6 times [2024-06-28 00:23:15,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:15,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643678546] [2024-06-28 00:23:15,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:15,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:16,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:16,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643678546] [2024-06-28 00:23:16,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643678546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:16,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:16,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:23:16,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054933647] [2024-06-28 00:23:16,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:16,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:23:16,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:16,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:23:16,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:23:16,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:23:16,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 461 transitions, 8310 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:16,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:16,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:23:16,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:17,657 INFO L124 PetriNetUnfolderBase]: 2678/4731 cut-off events. [2024-06-28 00:23:17,657 INFO L125 PetriNetUnfolderBase]: For 170265/170314 co-relation queries the response was YES. [2024-06-28 00:23:17,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32066 conditions, 4731 events. 2678/4731 cut-off events. For 170265/170314 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 34290 event pairs, 715 based on Foata normal form. 40/4728 useless extension candidates. Maximal degree in co-relation 31915. Up to 3977 conditions per place. [2024-06-28 00:23:17,716 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 380 selfloop transitions, 93 changer transitions 0/480 dead transitions. [2024-06-28 00:23:17,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 480 transitions, 9408 flow [2024-06-28 00:23:17,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:23:17,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:23:17,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-28 00:23:17,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-28 00:23:17,717 INFO L175 Difference]: Start difference. First operand has 365 places, 461 transitions, 8310 flow. Second operand 9 states and 155 transitions. [2024-06-28 00:23:17,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 480 transitions, 9408 flow [2024-06-28 00:23:18,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 480 transitions, 8968 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-28 00:23:18,844 INFO L231 Difference]: Finished difference. Result has 365 places, 467 transitions, 8211 flow [2024-06-28 00:23:18,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7870, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8211, PETRI_PLACES=365, PETRI_TRANSITIONS=467} [2024-06-28 00:23:18,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-28 00:23:18,845 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 467 transitions, 8211 flow [2024-06-28 00:23:18,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:18,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:18,845 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] [2024-06-28 00:23:18,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 00:23:18,845 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:18,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:18,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1771230387, now seen corresponding path program 8 times [2024-06-28 00:23:18,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:18,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397299373] [2024-06-28 00:23:18,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:18,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:19,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:19,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:19,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397299373] [2024-06-28 00:23:19,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397299373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:19,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:19,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:23:19,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61834461] [2024-06-28 00:23:19,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:19,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:23:19,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:19,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:23:19,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:23:19,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:23:19,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 467 transitions, 8211 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:19,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:19,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:23:19,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:20,667 INFO L124 PetriNetUnfolderBase]: 2804/4931 cut-off events. [2024-06-28 00:23:20,667 INFO L125 PetriNetUnfolderBase]: For 172775/172807 co-relation queries the response was YES. [2024-06-28 00:23:20,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32696 conditions, 4931 events. 2804/4931 cut-off events. For 172775/172807 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 35679 event pairs, 428 based on Foata normal form. 23/4909 useless extension candidates. Maximal degree in co-relation 32543. Up to 3783 conditions per place. [2024-06-28 00:23:20,726 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 430 selfloop transitions, 88 changer transitions 0/525 dead transitions. [2024-06-28 00:23:20,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 525 transitions, 9800 flow [2024-06-28 00:23:20,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:23:20,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:23:20,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-28 00:23:20,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-28 00:23:20,727 INFO L175 Difference]: Start difference. First operand has 365 places, 467 transitions, 8211 flow. Second operand 10 states and 173 transitions. [2024-06-28 00:23:20,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 525 transitions, 9800 flow [2024-06-28 00:23:21,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 525 transitions, 9575 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-28 00:23:21,819 INFO L231 Difference]: Finished difference. Result has 370 places, 498 transitions, 8707 flow [2024-06-28 00:23:21,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7998, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8707, PETRI_PLACES=370, PETRI_TRANSITIONS=498} [2024-06-28 00:23:21,820 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-28 00:23:21,820 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 498 transitions, 8707 flow [2024-06-28 00:23:21,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:21,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:21,820 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] [2024-06-28 00:23:21,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 00:23:21,821 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:21,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:21,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1953572979, now seen corresponding path program 9 times [2024-06-28 00:23:21,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:21,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75987598] [2024-06-28 00:23:21,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:21,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:22,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:22,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:22,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75987598] [2024-06-28 00:23:22,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75987598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:22,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:22,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:23:22,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644156600] [2024-06-28 00:23:22,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:22,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:23:22,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:22,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:23:22,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:23:22,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:23:22,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 498 transitions, 8707 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:22,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:22,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:23:22,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:23,666 INFO L124 PetriNetUnfolderBase]: 2812/4927 cut-off events. [2024-06-28 00:23:23,666 INFO L125 PetriNetUnfolderBase]: For 172076/172082 co-relation queries the response was YES. [2024-06-28 00:23:23,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33076 conditions, 4927 events. 2812/4927 cut-off events. For 172076/172082 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 35509 event pairs, 396 based on Foata normal form. 2/4879 useless extension candidates. Maximal degree in co-relation 32921. Up to 3848 conditions per place. [2024-06-28 00:23:23,725 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 443 selfloop transitions, 77 changer transitions 0/527 dead transitions. [2024-06-28 00:23:23,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 527 transitions, 9881 flow [2024-06-28 00:23:23,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:23:23,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:23:23,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 00:23:23,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-28 00:23:23,726 INFO L175 Difference]: Start difference. First operand has 370 places, 498 transitions, 8707 flow. Second operand 9 states and 160 transitions. [2024-06-28 00:23:23,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 527 transitions, 9881 flow [2024-06-28 00:23:24,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 527 transitions, 9764 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-28 00:23:24,780 INFO L231 Difference]: Finished difference. Result has 376 places, 501 transitions, 8809 flow [2024-06-28 00:23:24,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8590, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8809, PETRI_PLACES=376, PETRI_TRANSITIONS=501} [2024-06-28 00:23:24,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 333 predicate places. [2024-06-28 00:23:24,780 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 501 transitions, 8809 flow [2024-06-28 00:23:24,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:24,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:24,781 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] [2024-06-28 00:23:24,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 00:23:24,781 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:24,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:24,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1419563621, now seen corresponding path program 7 times [2024-06-28 00:23:24,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:24,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135270213] [2024-06-28 00:23:24,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:24,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:25,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:25,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135270213] [2024-06-28 00:23:25,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135270213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:25,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:25,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:23:25,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153791424] [2024-06-28 00:23:25,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:25,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:23:25,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:25,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:23:25,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:23:25,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:23:25,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 501 transitions, 8809 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) [2024-06-28 00:23:25,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:25,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:23:25,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:26,928 INFO L124 PetriNetUnfolderBase]: 2887/5088 cut-off events. [2024-06-28 00:23:26,928 INFO L125 PetriNetUnfolderBase]: For 207294/207311 co-relation queries the response was YES. [2024-06-28 00:23:26,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34335 conditions, 5088 events. 2887/5088 cut-off events. For 207294/207311 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 37224 event pairs, 722 based on Foata normal form. 23/5060 useless extension candidates. Maximal degree in co-relation 34180. Up to 4176 conditions per place. [2024-06-28 00:23:26,994 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 438 selfloop transitions, 103 changer transitions 0/549 dead transitions. [2024-06-28 00:23:26,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 549 transitions, 10363 flow [2024-06-28 00:23:26,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:23:26,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:23:26,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-28 00:23:26,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-28 00:23:26,994 INFO L175 Difference]: Start difference. First operand has 376 places, 501 transitions, 8809 flow. Second operand 9 states and 183 transitions. [2024-06-28 00:23:26,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 549 transitions, 10363 flow [2024-06-28 00:23:28,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 549 transitions, 10193 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-28 00:23:28,118 INFO L231 Difference]: Finished difference. Result has 383 places, 511 transitions, 9036 flow [2024-06-28 00:23:28,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8639, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9036, PETRI_PLACES=383, PETRI_TRANSITIONS=511} [2024-06-28 00:23:28,119 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-28 00:23:28,119 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 511 transitions, 9036 flow [2024-06-28 00:23:28,119 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) [2024-06-28 00:23:28,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:28,119 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] [2024-06-28 00:23:28,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 00:23:28,120 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:28,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:28,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1105990635, now seen corresponding path program 8 times [2024-06-28 00:23:28,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:28,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589272702] [2024-06-28 00:23:28,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:28,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:29,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:29,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:29,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589272702] [2024-06-28 00:23:29,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589272702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:29,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:29,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:23:29,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056444268] [2024-06-28 00:23:29,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:29,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:23:29,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:29,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:23:29,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:23:29,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:23:29,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 511 transitions, 9036 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) [2024-06-28 00:23:29,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:29,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:23:29,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:30,365 INFO L124 PetriNetUnfolderBase]: 2928/5159 cut-off events. [2024-06-28 00:23:30,365 INFO L125 PetriNetUnfolderBase]: For 214708/214725 co-relation queries the response was YES. [2024-06-28 00:23:30,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34923 conditions, 5159 events. 2928/5159 cut-off events. For 214708/214725 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 37783 event pairs, 728 based on Foata normal form. 23/5131 useless extension candidates. Maximal degree in co-relation 34767. Up to 4229 conditions per place. [2024-06-28 00:23:30,439 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 429 selfloop transitions, 108 changer transitions 0/545 dead transitions. [2024-06-28 00:23:30,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 545 transitions, 10315 flow [2024-06-28 00:23:30,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:23:30,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:23:30,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-28 00:23:30,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-28 00:23:30,440 INFO L175 Difference]: Start difference. First operand has 383 places, 511 transitions, 9036 flow. Second operand 8 states and 163 transitions. [2024-06-28 00:23:30,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 545 transitions, 10315 flow [2024-06-28 00:23:31,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 545 transitions, 10164 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-28 00:23:31,595 INFO L231 Difference]: Finished difference. Result has 390 places, 515 transitions, 9183 flow [2024-06-28 00:23:31,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8885, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9183, PETRI_PLACES=390, PETRI_TRANSITIONS=515} [2024-06-28 00:23:31,595 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-28 00:23:31,596 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 515 transitions, 9183 flow [2024-06-28 00:23:31,596 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) [2024-06-28 00:23:31,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:31,596 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] [2024-06-28 00:23:31,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 00:23:31,596 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:31,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:31,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1105574925, now seen corresponding path program 9 times [2024-06-28 00:23:31,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:31,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106781128] [2024-06-28 00:23:31,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:31,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:32,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:32,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:32,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106781128] [2024-06-28 00:23:32,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106781128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:32,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:32,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:23:32,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858132182] [2024-06-28 00:23:32,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:32,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:23:32,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:32,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:23:32,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:23:32,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:23:32,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 515 transitions, 9183 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) [2024-06-28 00:23:32,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:32,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:23:32,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:33,716 INFO L124 PetriNetUnfolderBase]: 3024/5295 cut-off events. [2024-06-28 00:23:33,716 INFO L125 PetriNetUnfolderBase]: For 246593/246610 co-relation queries the response was YES. [2024-06-28 00:23:33,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37111 conditions, 5295 events. 3024/5295 cut-off events. For 246593/246610 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 38613 event pairs, 731 based on Foata normal form. 23/5261 useless extension candidates. Maximal degree in co-relation 36952. Up to 3872 conditions per place. [2024-06-28 00:23:33,791 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 390 selfloop transitions, 169 changer transitions 0/567 dead transitions. [2024-06-28 00:23:33,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 567 transitions, 10996 flow [2024-06-28 00:23:33,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:23:33,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:23:33,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-28 00:23:33,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-06-28 00:23:33,792 INFO L175 Difference]: Start difference. First operand has 390 places, 515 transitions, 9183 flow. Second operand 8 states and 171 transitions. [2024-06-28 00:23:33,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 567 transitions, 10996 flow [2024-06-28 00:23:35,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 567 transitions, 10774 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-28 00:23:35,198 INFO L231 Difference]: Finished difference. Result has 397 places, 531 transitions, 9761 flow [2024-06-28 00:23:35,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8961, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9761, PETRI_PLACES=397, PETRI_TRANSITIONS=531} [2024-06-28 00:23:35,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-28 00:23:35,199 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 531 transitions, 9761 flow [2024-06-28 00:23:35,199 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) [2024-06-28 00:23:35,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:35,199 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] [2024-06-28 00:23:35,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 00:23:35,199 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:35,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:35,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1834289263, now seen corresponding path program 10 times [2024-06-28 00:23:35,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:35,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129162330] [2024-06-28 00:23:35,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:35,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:35,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:35,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129162330] [2024-06-28 00:23:35,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129162330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:35,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:35,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:23:35,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834001895] [2024-06-28 00:23:35,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:35,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:23:35,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:35,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:23:35,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:23:35,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:23:35,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 531 transitions, 9761 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:35,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:35,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:23:35,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:37,088 INFO L124 PetriNetUnfolderBase]: 3019/5264 cut-off events. [2024-06-28 00:23:37,088 INFO L125 PetriNetUnfolderBase]: For 232556/232562 co-relation queries the response was YES. [2024-06-28 00:23:37,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38119 conditions, 5264 events. 3019/5264 cut-off events. For 232556/232562 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 38089 event pairs, 427 based on Foata normal form. 2/5222 useless extension candidates. Maximal degree in co-relation 37955. Up to 4035 conditions per place. [2024-06-28 00:23:37,161 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 428 selfloop transitions, 117 changer transitions 0/552 dead transitions. [2024-06-28 00:23:37,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 552 transitions, 10917 flow [2024-06-28 00:23:37,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:23:37,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:23:37,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-28 00:23:37,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-28 00:23:37,162 INFO L175 Difference]: Start difference. First operand has 397 places, 531 transitions, 9761 flow. Second operand 9 states and 156 transitions. [2024-06-28 00:23:37,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 552 transitions, 10917 flow [2024-06-28 00:23:38,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 552 transitions, 10833 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-28 00:23:38,649 INFO L231 Difference]: Finished difference. Result has 404 places, 531 transitions, 9916 flow [2024-06-28 00:23:38,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9677, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9916, PETRI_PLACES=404, PETRI_TRANSITIONS=531} [2024-06-28 00:23:38,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-28 00:23:38,649 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 531 transitions, 9916 flow [2024-06-28 00:23:38,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:38,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:38,649 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] [2024-06-28 00:23:38,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 00:23:38,650 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:38,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:38,650 INFO L85 PathProgramCache]: Analyzing trace with hash 2100748379, now seen corresponding path program 10 times [2024-06-28 00:23:38,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:38,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122060115] [2024-06-28 00:23:38,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:38,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:39,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:39,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:39,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122060115] [2024-06-28 00:23:39,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122060115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:39,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:39,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:23:39,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241881591] [2024-06-28 00:23:39,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:39,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:23:39,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:39,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:23:39,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:23:39,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:23:39,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 531 transitions, 9916 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:39,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:39,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:23:39,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:40,702 INFO L124 PetriNetUnfolderBase]: 3016/5296 cut-off events. [2024-06-28 00:23:40,702 INFO L125 PetriNetUnfolderBase]: For 233343/233360 co-relation queries the response was YES. [2024-06-28 00:23:40,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38259 conditions, 5296 events. 3016/5296 cut-off events. For 233343/233360 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 38836 event pairs, 759 based on Foata normal form. 15/5256 useless extension candidates. Maximal degree in co-relation 38092. Up to 4547 conditions per place. [2024-06-28 00:23:40,779 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 483 selfloop transitions, 61 changer transitions 0/551 dead transitions. [2024-06-28 00:23:40,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 551 transitions, 11084 flow [2024-06-28 00:23:40,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:23:40,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:23:40,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-28 00:23:40,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-28 00:23:40,780 INFO L175 Difference]: Start difference. First operand has 404 places, 531 transitions, 9916 flow. Second operand 9 states and 157 transitions. [2024-06-28 00:23:40,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 551 transitions, 11084 flow [2024-06-28 00:23:42,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 551 transitions, 10764 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-28 00:23:42,361 INFO L231 Difference]: Finished difference. Result has 404 places, 532 transitions, 9734 flow [2024-06-28 00:23:42,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9596, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9734, PETRI_PLACES=404, PETRI_TRANSITIONS=532} [2024-06-28 00:23:42,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-28 00:23:42,361 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 532 transitions, 9734 flow [2024-06-28 00:23:42,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:42,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:42,361 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] [2024-06-28 00:23:42,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 00:23:42,362 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:42,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:42,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1826515951, now seen corresponding path program 11 times [2024-06-28 00:23:42,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:42,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570220141] [2024-06-28 00:23:42,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:42,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:43,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:43,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570220141] [2024-06-28 00:23:43,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570220141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:43,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:43,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:23:43,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916040653] [2024-06-28 00:23:43,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:43,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:23:43,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:43,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:23:43,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:23:43,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:23:43,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 532 transitions, 9734 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:43,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:43,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:23:43,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:44,292 INFO L124 PetriNetUnfolderBase]: 3021/5297 cut-off events. [2024-06-28 00:23:44,292 INFO L125 PetriNetUnfolderBase]: For 236572/236589 co-relation queries the response was YES. [2024-06-28 00:23:44,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37879 conditions, 5297 events. 3021/5297 cut-off events. For 236572/236589 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 38745 event pairs, 760 based on Foata normal form. 15/5255 useless extension candidates. Maximal degree in co-relation 37712. Up to 4502 conditions per place. [2024-06-28 00:23:44,370 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 462 selfloop transitions, 88 changer transitions 0/557 dead transitions. [2024-06-28 00:23:44,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 557 transitions, 11147 flow [2024-06-28 00:23:44,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:23:44,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:23:44,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-28 00:23:44,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-28 00:23:44,371 INFO L175 Difference]: Start difference. First operand has 404 places, 532 transitions, 9734 flow. Second operand 10 states and 171 transitions. [2024-06-28 00:23:44,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 557 transitions, 11147 flow [2024-06-28 00:23:45,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 557 transitions, 11015 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 00:23:45,725 INFO L231 Difference]: Finished difference. Result has 411 places, 537 transitions, 9959 flow [2024-06-28 00:23:45,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9602, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9959, PETRI_PLACES=411, PETRI_TRANSITIONS=537} [2024-06-28 00:23:45,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 368 predicate places. [2024-06-28 00:23:45,726 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 537 transitions, 9959 flow [2024-06-28 00:23:45,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:45,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:45,726 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] [2024-06-28 00:23:45,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 00:23:45,726 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:45,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:45,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1821153571, now seen corresponding path program 12 times [2024-06-28 00:23:45,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:45,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509373622] [2024-06-28 00:23:45,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:45,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:46,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:46,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509373622] [2024-06-28 00:23:46,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509373622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:46,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:46,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:23:46,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416229151] [2024-06-28 00:23:46,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:46,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:23:46,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:46,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:23:46,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:23:46,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:23:46,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 537 transitions, 9959 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:46,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:46,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:23:46,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:47,707 INFO L124 PetriNetUnfolderBase]: 3018/5293 cut-off events. [2024-06-28 00:23:47,707 INFO L125 PetriNetUnfolderBase]: For 241774/241791 co-relation queries the response was YES. [2024-06-28 00:23:47,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38245 conditions, 5293 events. 3018/5293 cut-off events. For 241774/241791 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 38704 event pairs, 760 based on Foata normal form. 15/5251 useless extension candidates. Maximal degree in co-relation 38075. Up to 4532 conditions per place. [2024-06-28 00:23:47,785 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 473 selfloop transitions, 77 changer transitions 0/557 dead transitions. [2024-06-28 00:23:47,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 557 transitions, 11275 flow [2024-06-28 00:23:47,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:23:47,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:23:47,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-28 00:23:47,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-28 00:23:47,786 INFO L175 Difference]: Start difference. First operand has 411 places, 537 transitions, 9959 flow. Second operand 10 states and 169 transitions. [2024-06-28 00:23:47,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 557 transitions, 11275 flow [2024-06-28 00:23:49,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 557 transitions, 11041 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-28 00:23:49,111 INFO L231 Difference]: Finished difference. Result has 414 places, 537 transitions, 9885 flow [2024-06-28 00:23:49,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9725, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9885, PETRI_PLACES=414, PETRI_TRANSITIONS=537} [2024-06-28 00:23:49,111 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-28 00:23:49,111 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 537 transitions, 9885 flow [2024-06-28 00:23:49,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:49,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:49,111 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] [2024-06-28 00:23:49,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 00:23:49,111 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:49,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:49,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1834277731, now seen corresponding path program 13 times [2024-06-28 00:23:49,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:49,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448547855] [2024-06-28 00:23:49,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:49,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:49,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:49,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:49,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448547855] [2024-06-28 00:23:49,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448547855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:49,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:49,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:23:49,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109372700] [2024-06-28 00:23:49,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:49,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:23:49,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:49,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:23:49,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:23:49,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:23:49,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 537 transitions, 9885 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:49,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:49,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:23:49,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:51,367 INFO L124 PetriNetUnfolderBase]: 3015/5291 cut-off events. [2024-06-28 00:23:51,367 INFO L125 PetriNetUnfolderBase]: For 245099/245116 co-relation queries the response was YES. [2024-06-28 00:23:51,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38027 conditions, 5291 events. 3015/5291 cut-off events. For 245099/245116 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 38799 event pairs, 763 based on Foata normal form. 15/5249 useless extension candidates. Maximal degree in co-relation 37857. Up to 4532 conditions per place. [2024-06-28 00:23:51,447 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 470 selfloop transitions, 79 changer transitions 0/556 dead transitions. [2024-06-28 00:23:51,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 556 transitions, 11055 flow [2024-06-28 00:23:51,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:23:51,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:23:51,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 00:23:51,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-28 00:23:51,448 INFO L175 Difference]: Start difference. First operand has 414 places, 537 transitions, 9885 flow. Second operand 9 states and 158 transitions. [2024-06-28 00:23:51,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 556 transitions, 11055 flow [2024-06-28 00:23:52,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 556 transitions, 10841 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-28 00:23:52,976 INFO L231 Difference]: Finished difference. Result has 415 places, 537 transitions, 9835 flow [2024-06-28 00:23:52,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9671, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9835, PETRI_PLACES=415, PETRI_TRANSITIONS=537} [2024-06-28 00:23:52,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-28 00:23:52,977 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 537 transitions, 9835 flow [2024-06-28 00:23:52,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:52,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:52,977 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, 1] [2024-06-28 00:23:52,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 00:23:52,977 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:52,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:52,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1780700853, now seen corresponding path program 11 times [2024-06-28 00:23:52,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:52,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281800366] [2024-06-28 00:23:52,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:52,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:54,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:54,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281800366] [2024-06-28 00:23:54,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281800366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:54,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:54,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:23:54,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587351761] [2024-06-28 00:23:54,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:54,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:23:54,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:54,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:23:54,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:23:54,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:23:54,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 537 transitions, 9835 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:54,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:54,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:23:54,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:55,670 INFO L124 PetriNetUnfolderBase]: 3043/5325 cut-off events. [2024-06-28 00:23:55,670 INFO L125 PetriNetUnfolderBase]: For 261647/261653 co-relation queries the response was YES. [2024-06-28 00:23:55,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38289 conditions, 5325 events. 3043/5325 cut-off events. For 261647/261653 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 38566 event pairs, 313 based on Foata normal form. 6/5296 useless extension candidates. Maximal degree in co-relation 38118. Up to 2889 conditions per place. [2024-06-28 00:23:55,746 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 358 selfloop transitions, 212 changer transitions 0/577 dead transitions. [2024-06-28 00:23:55,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 577 transitions, 11335 flow [2024-06-28 00:23:55,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:23:55,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:23:55,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 208 transitions. [2024-06-28 00:23:55,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-28 00:23:55,747 INFO L175 Difference]: Start difference. First operand has 415 places, 537 transitions, 9835 flow. Second operand 12 states and 208 transitions. [2024-06-28 00:23:55,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 577 transitions, 11335 flow [2024-06-28 00:23:57,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 577 transitions, 11145 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 00:23:57,325 INFO L231 Difference]: Finished difference. Result has 423 places, 542 transitions, 10416 flow [2024-06-28 00:23:57,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9645, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10416, PETRI_PLACES=423, PETRI_TRANSITIONS=542} [2024-06-28 00:23:57,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-28 00:23:57,326 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 542 transitions, 10416 flow [2024-06-28 00:23:57,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:57,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:57,326 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] [2024-06-28 00:23:57,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 00:23:57,326 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:57,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:57,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1666577055, now seen corresponding path program 14 times [2024-06-28 00:23:57,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:57,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788216766] [2024-06-28 00:23:57,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:57,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:58,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:58,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788216766] [2024-06-28 00:23:58,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788216766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:58,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:58,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:23:58,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626357418] [2024-06-28 00:23:58,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:58,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:23:58,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:58,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:23:58,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:23:58,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:23:58,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 542 transitions, 10416 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:58,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:58,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:23:58,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:59,558 INFO L124 PetriNetUnfolderBase]: 3048/5349 cut-off events. [2024-06-28 00:23:59,558 INFO L125 PetriNetUnfolderBase]: For 272317/272334 co-relation queries the response was YES. [2024-06-28 00:23:59,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40012 conditions, 5349 events. 3048/5349 cut-off events. For 272317/272334 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 39185 event pairs, 742 based on Foata normal form. 17/5309 useless extension candidates. Maximal degree in co-relation 39838. Up to 4366 conditions per place. [2024-06-28 00:23:59,628 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 424 selfloop transitions, 137 changer transitions 0/568 dead transitions. [2024-06-28 00:23:59,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 568 transitions, 11680 flow [2024-06-28 00:23:59,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:23:59,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:23:59,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-28 00:23:59,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-28 00:23:59,629 INFO L175 Difference]: Start difference. First operand has 423 places, 542 transitions, 10416 flow. Second operand 10 states and 176 transitions. [2024-06-28 00:23:59,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 568 transitions, 11680 flow [2024-06-28 00:24:01,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 568 transitions, 11061 flow, removed 87 selfloop flow, removed 9 redundant places. [2024-06-28 00:24:01,536 INFO L231 Difference]: Finished difference. Result has 424 places, 544 transitions, 10144 flow [2024-06-28 00:24:01,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9797, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10144, PETRI_PLACES=424, PETRI_TRANSITIONS=544} [2024-06-28 00:24:01,537 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-28 00:24:01,537 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 544 transitions, 10144 flow [2024-06-28 00:24:01,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:01,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:01,537 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] [2024-06-28 00:24:01,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 00:24:01,538 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:01,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:01,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1443772733, now seen corresponding path program 15 times [2024-06-28 00:24:01,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:01,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288625233] [2024-06-28 00:24:01,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:01,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:01,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:02,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:02,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288625233] [2024-06-28 00:24:02,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288625233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:02,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:02,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:02,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223256801] [2024-06-28 00:24:02,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:02,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:02,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:02,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:02,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:02,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:24:02,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 544 transitions, 10144 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:02,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:02,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:24:02,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:03,787 INFO L124 PetriNetUnfolderBase]: 3061/5400 cut-off events. [2024-06-28 00:24:03,787 INFO L125 PetriNetUnfolderBase]: For 221592/221624 co-relation queries the response was YES. [2024-06-28 00:24:03,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38640 conditions, 5400 events. 3061/5400 cut-off events. For 221592/221624 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 39776 event pairs, 727 based on Foata normal form. 28/5371 useless extension candidates. Maximal degree in co-relation 38466. Up to 4385 conditions per place. [2024-06-28 00:24:03,860 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 420 selfloop transitions, 141 changer transitions 0/568 dead transitions. [2024-06-28 00:24:03,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 568 transitions, 11479 flow [2024-06-28 00:24:03,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:24:03,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:24:03,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 00:24:03,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-28 00:24:03,861 INFO L175 Difference]: Start difference. First operand has 424 places, 544 transitions, 10144 flow. Second operand 9 states and 160 transitions. [2024-06-28 00:24:03,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 568 transitions, 11479 flow [2024-06-28 00:24:05,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 568 transitions, 11144 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-28 00:24:05,430 INFO L231 Difference]: Finished difference. Result has 425 places, 549 transitions, 10254 flow [2024-06-28 00:24:05,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9809, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10254, PETRI_PLACES=425, PETRI_TRANSITIONS=549} [2024-06-28 00:24:05,431 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-28 00:24:05,431 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 549 transitions, 10254 flow [2024-06-28 00:24:05,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:05,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:05,431 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] [2024-06-28 00:24:05,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 00:24:05,431 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:05,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:05,432 INFO L85 PathProgramCache]: Analyzing trace with hash 878341171, now seen corresponding path program 16 times [2024-06-28 00:24:05,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:05,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919259901] [2024-06-28 00:24:05,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:05,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:06,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:06,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919259901] [2024-06-28 00:24:06,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919259901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:06,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:06,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:06,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467597043] [2024-06-28 00:24:06,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:06,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:06,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:06,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:06,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:06,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:24:06,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 549 transitions, 10254 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:06,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:06,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:24:06,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:07,530 INFO L124 PetriNetUnfolderBase]: 3058/5382 cut-off events. [2024-06-28 00:24:07,530 INFO L125 PetriNetUnfolderBase]: For 218607/218639 co-relation queries the response was YES. [2024-06-28 00:24:07,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38751 conditions, 5382 events. 3058/5382 cut-off events. For 218607/218639 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 39649 event pairs, 783 based on Foata normal form. 26/5351 useless extension candidates. Maximal degree in co-relation 38576. Up to 4590 conditions per place. [2024-06-28 00:24:07,612 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 473 selfloop transitions, 86 changer transitions 0/566 dead transitions. [2024-06-28 00:24:07,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 566 transitions, 11486 flow [2024-06-28 00:24:07,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:24:07,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:24:07,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-28 00:24:07,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-28 00:24:07,613 INFO L175 Difference]: Start difference. First operand has 425 places, 549 transitions, 10254 flow. Second operand 9 states and 155 transitions. [2024-06-28 00:24:07,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 566 transitions, 11486 flow [2024-06-28 00:24:09,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 566 transitions, 11087 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-28 00:24:09,128 INFO L231 Difference]: Finished difference. Result has 427 places, 552 transitions, 10107 flow [2024-06-28 00:24:09,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9855, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10107, PETRI_PLACES=427, PETRI_TRANSITIONS=552} [2024-06-28 00:24:09,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-28 00:24:09,129 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 552 transitions, 10107 flow [2024-06-28 00:24:09,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:09,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:09,129 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] [2024-06-28 00:24:09,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 00:24:09,129 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:09,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:09,129 INFO L85 PathProgramCache]: Analyzing trace with hash -986670093, now seen corresponding path program 17 times [2024-06-28 00:24:09,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:09,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329246330] [2024-06-28 00:24:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:09,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:09,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:09,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:09,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:09,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329246330] [2024-06-28 00:24:09,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329246330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:09,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:09,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:09,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133683344] [2024-06-28 00:24:09,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:09,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:09,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:09,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:09,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:09,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:24:09,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 552 transitions, 10107 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:09,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:09,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:24:09,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:11,168 INFO L124 PetriNetUnfolderBase]: 3071/5394 cut-off events. [2024-06-28 00:24:11,169 INFO L125 PetriNetUnfolderBase]: For 225258/225290 co-relation queries the response was YES. [2024-06-28 00:24:11,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38960 conditions, 5394 events. 3071/5394 cut-off events. For 225258/225290 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 39595 event pairs, 783 based on Foata normal form. 26/5363 useless extension candidates. Maximal degree in co-relation 38784. Up to 4491 conditions per place. [2024-06-28 00:24:11,248 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 426 selfloop transitions, 146 changer transitions 0/579 dead transitions. [2024-06-28 00:24:11,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 579 transitions, 11911 flow [2024-06-28 00:24:11,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:24:11,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:24:11,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 00:24:11,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-28 00:24:11,249 INFO L175 Difference]: Start difference. First operand has 427 places, 552 transitions, 10107 flow. Second operand 9 states and 161 transitions. [2024-06-28 00:24:11,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 579 transitions, 11911 flow [2024-06-28 00:24:12,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 579 transitions, 11695 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-28 00:24:12,672 INFO L231 Difference]: Finished difference. Result has 430 places, 563 transitions, 10517 flow [2024-06-28 00:24:12,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9891, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10517, PETRI_PLACES=430, PETRI_TRANSITIONS=563} [2024-06-28 00:24:12,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-28 00:24:12,673 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 563 transitions, 10517 flow [2024-06-28 00:24:12,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:12,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:12,673 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] [2024-06-28 00:24:12,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 00:24:12,673 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:12,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:12,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1788980953, now seen corresponding path program 12 times [2024-06-28 00:24:12,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:12,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364230921] [2024-06-28 00:24:12,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:12,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:13,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:13,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364230921] [2024-06-28 00:24:13,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364230921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:13,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:13,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:13,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726041121] [2024-06-28 00:24:13,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:13,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:13,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:13,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:13,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:13,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:24:13,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 563 transitions, 10517 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:13,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:13,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:24:13,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:15,074 INFO L124 PetriNetUnfolderBase]: 3091/5402 cut-off events. [2024-06-28 00:24:15,074 INFO L125 PetriNetUnfolderBase]: For 229998/230024 co-relation queries the response was YES. [2024-06-28 00:24:15,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39497 conditions, 5402 events. 3091/5402 cut-off events. For 229998/230024 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 39269 event pairs, 454 based on Foata normal form. 13/5376 useless extension candidates. Maximal degree in co-relation 39320. Up to 2942 conditions per place. [2024-06-28 00:24:15,154 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 396 selfloop transitions, 194 changer transitions 0/597 dead transitions. [2024-06-28 00:24:15,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 597 transitions, 11941 flow [2024-06-28 00:24:15,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:24:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:24:15,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 201 transitions. [2024-06-28 00:24:15,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-28 00:24:15,155 INFO L175 Difference]: Start difference. First operand has 430 places, 563 transitions, 10517 flow. Second operand 12 states and 201 transitions. [2024-06-28 00:24:15,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 597 transitions, 11941 flow [2024-06-28 00:24:16,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 597 transitions, 11621 flow, removed 90 selfloop flow, removed 4 redundant places. [2024-06-28 00:24:16,878 INFO L231 Difference]: Finished difference. Result has 437 places, 566 transitions, 10652 flow [2024-06-28 00:24:16,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10209, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10652, PETRI_PLACES=437, PETRI_TRANSITIONS=566} [2024-06-28 00:24:16,879 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-28 00:24:16,879 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 566 transitions, 10652 flow [2024-06-28 00:24:16,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:16,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:16,879 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] [2024-06-28 00:24:16,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 00:24:16,879 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:16,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:16,880 INFO L85 PathProgramCache]: Analyzing trace with hash -981544863, now seen corresponding path program 18 times [2024-06-28 00:24:16,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:16,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211120076] [2024-06-28 00:24:16,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:16,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:17,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:17,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211120076] [2024-06-28 00:24:17,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211120076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:17,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:17,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:17,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644825630] [2024-06-28 00:24:17,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:17,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:17,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:17,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:17,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:17,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:24:17,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 566 transitions, 10652 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:17,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:17,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:24:17,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:18,844 INFO L124 PetriNetUnfolderBase]: 3096/5447 cut-off events. [2024-06-28 00:24:18,844 INFO L125 PetriNetUnfolderBase]: For 233508/233540 co-relation queries the response was YES. [2024-06-28 00:24:18,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40243 conditions, 5447 events. 3096/5447 cut-off events. For 233508/233540 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 40147 event pairs, 795 based on Foata normal form. 26/5416 useless extension candidates. Maximal degree in co-relation 40066. Up to 4592 conditions per place. [2024-06-28 00:24:18,922 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 466 selfloop transitions, 112 changer transitions 0/585 dead transitions. [2024-06-28 00:24:18,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 585 transitions, 11941 flow [2024-06-28 00:24:18,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:24:18,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:24:18,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-28 00:24:18,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-28 00:24:18,925 INFO L175 Difference]: Start difference. First operand has 437 places, 566 transitions, 10652 flow. Second operand 9 states and 157 transitions. [2024-06-28 00:24:18,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 585 transitions, 11941 flow [2024-06-28 00:24:20,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 585 transitions, 11374 flow, removed 37 selfloop flow, removed 10 redundant places. [2024-06-28 00:24:20,629 INFO L231 Difference]: Finished difference. Result has 436 places, 571 transitions, 10408 flow [2024-06-28 00:24:20,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10085, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10408, PETRI_PLACES=436, PETRI_TRANSITIONS=571} [2024-06-28 00:24:20,630 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-28 00:24:20,630 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 571 transitions, 10408 flow [2024-06-28 00:24:20,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:20,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:20,630 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] [2024-06-28 00:24:20,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 00:24:20,630 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:20,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:20,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1078058671, now seen corresponding path program 19 times [2024-06-28 00:24:20,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:20,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945145282] [2024-06-28 00:24:20,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:20,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:21,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:21,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:21,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945145282] [2024-06-28 00:24:21,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945145282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:21,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:21,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:21,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117608288] [2024-06-28 00:24:21,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:21,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:21,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:21,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:21,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:21,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:24:21,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 571 transitions, 10408 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:21,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:21,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:24:21,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:22,667 INFO L124 PetriNetUnfolderBase]: 3117/5476 cut-off events. [2024-06-28 00:24:22,667 INFO L125 PetriNetUnfolderBase]: For 237978/238010 co-relation queries the response was YES. [2024-06-28 00:24:22,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39782 conditions, 5476 events. 3117/5476 cut-off events. For 237978/238010 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 40371 event pairs, 785 based on Foata normal form. 26/5441 useless extension candidates. Maximal degree in co-relation 39605. Up to 4604 conditions per place. [2024-06-28 00:24:22,752 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 454 selfloop transitions, 134 changer transitions 0/595 dead transitions. [2024-06-28 00:24:22,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 595 transitions, 11990 flow [2024-06-28 00:24:22,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:24:22,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:24:22,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-28 00:24:22,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-28 00:24:22,755 INFO L175 Difference]: Start difference. First operand has 436 places, 571 transitions, 10408 flow. Second operand 10 states and 168 transitions. [2024-06-28 00:24:22,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 595 transitions, 11990 flow [2024-06-28 00:24:24,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 595 transitions, 11732 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-28 00:24:24,394 INFO L231 Difference]: Finished difference. Result has 442 places, 580 transitions, 10664 flow [2024-06-28 00:24:24,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10150, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10664, PETRI_PLACES=442, PETRI_TRANSITIONS=580} [2024-06-28 00:24:24,394 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-28 00:24:24,394 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 580 transitions, 10664 flow [2024-06-28 00:24:24,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:24,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:24,394 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] [2024-06-28 00:24:24,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 00:24:24,395 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:24,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:24,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1077821335, now seen corresponding path program 13 times [2024-06-28 00:24:24,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:24,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324729061] [2024-06-28 00:24:24,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:24,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:25,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:25,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:25,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324729061] [2024-06-28 00:24:25,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324729061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:25,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:25,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:25,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062805357] [2024-06-28 00:24:25,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:25,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:25,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:25,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:25,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:25,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:24:25,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 580 transitions, 10664 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:25,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:25,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:24:25,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:26,904 INFO L124 PetriNetUnfolderBase]: 3137/5494 cut-off events. [2024-06-28 00:24:26,905 INFO L125 PetriNetUnfolderBase]: For 239746/239772 co-relation queries the response was YES. [2024-06-28 00:24:26,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40099 conditions, 5494 events. 3137/5494 cut-off events. For 239746/239772 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 40145 event pairs, 448 based on Foata normal form. 13/5472 useless extension candidates. Maximal degree in co-relation 39920. Up to 2990 conditions per place. [2024-06-28 00:24:26,988 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 385 selfloop transitions, 213 changer transitions 0/605 dead transitions. [2024-06-28 00:24:26,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 605 transitions, 12007 flow [2024-06-28 00:24:26,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:24:26,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:24:26,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 00:24:26,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-28 00:24:26,989 INFO L175 Difference]: Start difference. First operand has 442 places, 580 transitions, 10664 flow. Second operand 9 states and 161 transitions. [2024-06-28 00:24:26,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 605 transitions, 12007 flow [2024-06-28 00:24:28,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 605 transitions, 11834 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-28 00:24:28,518 INFO L231 Difference]: Finished difference. Result has 446 places, 581 transitions, 10940 flow [2024-06-28 00:24:28,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10492, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10940, PETRI_PLACES=446, PETRI_TRANSITIONS=581} [2024-06-28 00:24:28,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-28 00:24:28,519 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 581 transitions, 10940 flow [2024-06-28 00:24:28,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:28,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:28,519 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] [2024-06-28 00:24:28,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 00:24:28,520 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:28,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:28,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1163217753, now seen corresponding path program 20 times [2024-06-28 00:24:28,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:28,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723233969] [2024-06-28 00:24:28,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:28,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:29,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:29,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723233969] [2024-06-28 00:24:29,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723233969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:29,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:29,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:29,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262485915] [2024-06-28 00:24:29,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:29,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:29,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:29,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:29,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:29,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:24:29,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 581 transitions, 10940 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:29,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:29,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:24:29,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:30,850 INFO L124 PetriNetUnfolderBase]: 3142/5550 cut-off events. [2024-06-28 00:24:30,851 INFO L125 PetriNetUnfolderBase]: For 248531/248563 co-relation queries the response was YES. [2024-06-28 00:24:30,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41156 conditions, 5550 events. 3142/5550 cut-off events. For 248531/248563 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 41142 event pairs, 715 based on Foata normal form. 28/5523 useless extension candidates. Maximal degree in co-relation 40974. Up to 4507 conditions per place. [2024-06-28 00:24:30,928 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 454 selfloop transitions, 141 changer transitions 0/602 dead transitions. [2024-06-28 00:24:30,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 602 transitions, 12263 flow [2024-06-28 00:24:30,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:24:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:24:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 00:24:30,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-28 00:24:30,929 INFO L175 Difference]: Start difference. First operand has 446 places, 581 transitions, 10940 flow. Second operand 9 states and 160 transitions. [2024-06-28 00:24:30,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 602 transitions, 12263 flow [2024-06-28 00:24:32,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 602 transitions, 11821 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 00:24:32,397 INFO L231 Difference]: Finished difference. Result has 448 places, 583 transitions, 10861 flow [2024-06-28 00:24:32,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10498, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10861, PETRI_PLACES=448, PETRI_TRANSITIONS=583} [2024-06-28 00:24:32,398 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-28 00:24:32,398 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 583 transitions, 10861 flow [2024-06-28 00:24:32,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:32,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:32,398 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] [2024-06-28 00:24:32,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 00:24:32,398 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:32,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:32,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1340349459, now seen corresponding path program 14 times [2024-06-28 00:24:32,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:32,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558003362] [2024-06-28 00:24:32,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:32,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:33,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:33,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:33,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558003362] [2024-06-28 00:24:33,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558003362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:33,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:33,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:33,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317037850] [2024-06-28 00:24:33,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:33,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:33,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:33,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:33,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:33,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:24:33,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 583 transitions, 10861 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:33,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:33,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:24:33,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:34,890 INFO L124 PetriNetUnfolderBase]: 3162/5524 cut-off events. [2024-06-28 00:24:34,891 INFO L125 PetriNetUnfolderBase]: For 244431/244457 co-relation queries the response was YES. [2024-06-28 00:24:34,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40809 conditions, 5524 events. 3162/5524 cut-off events. For 244431/244457 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 40340 event pairs, 458 based on Foata normal form. 13/5498 useless extension candidates. Maximal degree in co-relation 40626. Up to 3010 conditions per place. [2024-06-28 00:24:34,971 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 392 selfloop transitions, 215 changer transitions 0/614 dead transitions. [2024-06-28 00:24:34,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 614 transitions, 12254 flow [2024-06-28 00:24:34,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:24:34,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:24:34,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-06-28 00:24:34,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-28 00:24:34,972 INFO L175 Difference]: Start difference. First operand has 448 places, 583 transitions, 10861 flow. Second operand 12 states and 200 transitions. [2024-06-28 00:24:34,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 614 transitions, 12254 flow [2024-06-28 00:24:36,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 614 transitions, 11873 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-28 00:24:36,548 INFO L231 Difference]: Finished difference. Result has 452 places, 584 transitions, 10924 flow [2024-06-28 00:24:36,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10480, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10924, PETRI_PLACES=452, PETRI_TRANSITIONS=584} [2024-06-28 00:24:36,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 409 predicate places. [2024-06-28 00:24:36,549 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 584 transitions, 10924 flow [2024-06-28 00:24:36,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:36,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:36,549 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] [2024-06-28 00:24:36,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 00:24:36,549 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:36,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:36,550 INFO L85 PathProgramCache]: Analyzing trace with hash -2001325063, now seen corresponding path program 15 times [2024-06-28 00:24:36,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:36,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113933932] [2024-06-28 00:24:36,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:36,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:37,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:37,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:37,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113933932] [2024-06-28 00:24:37,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113933932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:37,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:37,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:37,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395202728] [2024-06-28 00:24:37,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:37,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:37,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:37,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:37,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:37,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:24:37,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 584 transitions, 10924 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:37,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:37,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:24:37,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:39,268 INFO L124 PetriNetUnfolderBase]: 3145/5491 cut-off events. [2024-06-28 00:24:39,268 INFO L125 PetriNetUnfolderBase]: For 243244/243250 co-relation queries the response was YES. [2024-06-28 00:24:39,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41115 conditions, 5491 events. 3145/5491 cut-off events. For 243244/243250 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 40095 event pairs, 476 based on Foata normal form. 6/5432 useless extension candidates. Maximal degree in co-relation 40932. Up to 4547 conditions per place. [2024-06-28 00:24:39,352 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 545 selfloop transitions, 57 changer transitions 0/609 dead transitions. [2024-06-28 00:24:39,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 609 transitions, 12245 flow [2024-06-28 00:24:39,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:24:39,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:24:39,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-28 00:24:39,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-28 00:24:39,353 INFO L175 Difference]: Start difference. First operand has 452 places, 584 transitions, 10924 flow. Second operand 11 states and 183 transitions. [2024-06-28 00:24:39,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 609 transitions, 12245 flow [2024-06-28 00:24:40,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 609 transitions, 11587 flow, removed 22 selfloop flow, removed 15 redundant places. [2024-06-28 00:24:40,835 INFO L231 Difference]: Finished difference. Result has 445 places, 582 transitions, 10361 flow [2024-06-28 00:24:40,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10233, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10361, PETRI_PLACES=445, PETRI_TRANSITIONS=582} [2024-06-28 00:24:40,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-28 00:24:40,836 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 582 transitions, 10361 flow [2024-06-28 00:24:40,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:40,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:40,836 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] [2024-06-28 00:24:40,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 00:24:40,836 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:40,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:40,837 INFO L85 PathProgramCache]: Analyzing trace with hash -818368507, now seen corresponding path program 16 times [2024-06-28 00:24:40,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:40,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374685121] [2024-06-28 00:24:40,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:40,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:41,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:41,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:41,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374685121] [2024-06-28 00:24:41,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374685121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:41,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:41,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:41,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798668413] [2024-06-28 00:24:41,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:41,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:41,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:41,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:41,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:41,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:24:41,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 582 transitions, 10361 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:41,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:41,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:24:41,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:43,368 INFO L124 PetriNetUnfolderBase]: 3128/5468 cut-off events. [2024-06-28 00:24:43,368 INFO L125 PetriNetUnfolderBase]: For 238756/238762 co-relation queries the response was YES. [2024-06-28 00:24:43,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39168 conditions, 5468 events. 3128/5468 cut-off events. For 238756/238762 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 39830 event pairs, 425 based on Foata normal form. 6/5415 useless extension candidates. Maximal degree in co-relation 38992. Up to 4417 conditions per place. [2024-06-28 00:24:43,435 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 533 selfloop transitions, 63 changer transitions 0/603 dead transitions. [2024-06-28 00:24:43,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 603 transitions, 11664 flow [2024-06-28 00:24:43,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:24:43,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:24:43,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-28 00:24:43,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-28 00:24:43,452 INFO L175 Difference]: Start difference. First operand has 445 places, 582 transitions, 10361 flow. Second operand 10 states and 165 transitions. [2024-06-28 00:24:43,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 603 transitions, 11664 flow [2024-06-28 00:24:45,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 603 transitions, 10791 flow, removed 21 selfloop flow, removed 18 redundant places. [2024-06-28 00:24:45,209 INFO L231 Difference]: Finished difference. Result has 435 places, 579 transitions, 9601 flow [2024-06-28 00:24:45,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9475, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9601, PETRI_PLACES=435, PETRI_TRANSITIONS=579} [2024-06-28 00:24:45,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-28 00:24:45,209 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 579 transitions, 9601 flow [2024-06-28 00:24:45,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:45,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:45,209 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] [2024-06-28 00:24:45,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 00:24:45,209 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:45,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:45,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1788743617, now seen corresponding path program 21 times [2024-06-28 00:24:45,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:45,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383960299] [2024-06-28 00:24:45,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:45,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:45,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:45,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383960299] [2024-06-28 00:24:45,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383960299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:45,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:45,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:45,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246412221] [2024-06-28 00:24:45,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:45,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:45,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:45,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:45,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:46,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:24:46,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 579 transitions, 9601 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:46,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:46,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:24:46,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:47,368 INFO L124 PetriNetUnfolderBase]: 3125/5494 cut-off events. [2024-06-28 00:24:47,369 INFO L125 PetriNetUnfolderBase]: For 232199/232231 co-relation queries the response was YES. [2024-06-28 00:24:47,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36737 conditions, 5494 events. 3125/5494 cut-off events. For 232199/232231 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 40549 event pairs, 791 based on Foata normal form. 26/5462 useless extension candidates. Maximal degree in co-relation 36569. Up to 4620 conditions per place. [2024-06-28 00:24:47,443 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 464 selfloop transitions, 123 changer transitions 0/594 dead transitions. [2024-06-28 00:24:47,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 594 transitions, 10977 flow [2024-06-28 00:24:47,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:24:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:24:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-28 00:24:47,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-28 00:24:47,445 INFO L175 Difference]: Start difference. First operand has 435 places, 579 transitions, 9601 flow. Second operand 10 states and 169 transitions. [2024-06-28 00:24:47,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 594 transitions, 10977 flow [2024-06-28 00:24:48,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 594 transitions, 10614 flow, removed 2 selfloop flow, removed 14 redundant places. [2024-06-28 00:24:48,764 INFO L231 Difference]: Finished difference. Result has 431 places, 579 transitions, 9490 flow [2024-06-28 00:24:48,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9238, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9490, PETRI_PLACES=431, PETRI_TRANSITIONS=579} [2024-06-28 00:24:48,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-28 00:24:48,764 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 579 transitions, 9490 flow [2024-06-28 00:24:48,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:48,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:48,766 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] [2024-06-28 00:24:48,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 00:24:48,766 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:48,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:48,766 INFO L85 PathProgramCache]: Analyzing trace with hash -703330695, now seen corresponding path program 22 times [2024-06-28 00:24:48,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:48,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104057262] [2024-06-28 00:24:48,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:48,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:49,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:49,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:49,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104057262] [2024-06-28 00:24:49,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104057262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:49,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:49,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:49,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606381886] [2024-06-28 00:24:49,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:49,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:49,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:49,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:49,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:49,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:24:49,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 579 transitions, 9490 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:49,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:49,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:24:49,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:50,821 INFO L124 PetriNetUnfolderBase]: 3143/5523 cut-off events. [2024-06-28 00:24:50,821 INFO L125 PetriNetUnfolderBase]: For 237421/237453 co-relation queries the response was YES. [2024-06-28 00:24:50,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36965 conditions, 5523 events. 3143/5523 cut-off events. For 237421/237453 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 40890 event pairs, 783 based on Foata normal form. 26/5491 useless extension candidates. Maximal degree in co-relation 36797. Up to 4721 conditions per place. [2024-06-28 00:24:50,895 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 514 selfloop transitions, 84 changer transitions 0/605 dead transitions. [2024-06-28 00:24:50,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 605 transitions, 11113 flow [2024-06-28 00:24:50,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:24:50,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:24:50,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-28 00:24:50,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 00:24:50,896 INFO L175 Difference]: Start difference. First operand has 431 places, 579 transitions, 9490 flow. Second operand 10 states and 170 transitions. [2024-06-28 00:24:50,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 605 transitions, 11113 flow [2024-06-28 00:24:52,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 605 transitions, 10630 flow, removed 37 selfloop flow, removed 10 redundant places. [2024-06-28 00:24:52,521 INFO L231 Difference]: Finished difference. Result has 433 places, 589 transitions, 9434 flow [2024-06-28 00:24:52,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9027, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9434, PETRI_PLACES=433, PETRI_TRANSITIONS=589} [2024-06-28 00:24:52,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-28 00:24:52,522 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 589 transitions, 9434 flow [2024-06-28 00:24:52,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:52,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:52,522 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] [2024-06-28 00:24:52,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 00:24:52,522 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:52,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:52,522 INFO L85 PathProgramCache]: Analyzing trace with hash 348894179, now seen corresponding path program 23 times [2024-06-28 00:24:52,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:52,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851577180] [2024-06-28 00:24:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:52,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:53,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:53,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851577180] [2024-06-28 00:24:53,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851577180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:53,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:53,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:53,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702107161] [2024-06-28 00:24:53,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:53,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:53,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:53,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:53,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:53,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:24:53,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 589 transitions, 9434 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:53,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:53,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:24:53,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:54,580 INFO L124 PetriNetUnfolderBase]: 3140/5507 cut-off events. [2024-06-28 00:24:54,580 INFO L125 PetriNetUnfolderBase]: For 238095/238127 co-relation queries the response was YES. [2024-06-28 00:24:54,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36450 conditions, 5507 events. 3140/5507 cut-off events. For 238095/238127 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 40505 event pairs, 797 based on Foata normal form. 26/5473 useless extension candidates. Maximal degree in co-relation 36281. Up to 4724 conditions per place. [2024-06-28 00:24:54,656 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 518 selfloop transitions, 78 changer transitions 0/603 dead transitions. [2024-06-28 00:24:54,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 603 transitions, 10672 flow [2024-06-28 00:24:54,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:24:54,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:24:54,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-28 00:24:54,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-28 00:24:54,657 INFO L175 Difference]: Start difference. First operand has 433 places, 589 transitions, 9434 flow. Second operand 9 states and 154 transitions. [2024-06-28 00:24:54,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 603 transitions, 10672 flow [2024-06-28 00:24:56,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 603 transitions, 10424 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-28 00:24:56,311 INFO L231 Difference]: Finished difference. Result has 436 places, 589 transitions, 9348 flow [2024-06-28 00:24:56,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9186, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9348, PETRI_PLACES=436, PETRI_TRANSITIONS=589} [2024-06-28 00:24:56,312 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-28 00:24:56,312 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 589 transitions, 9348 flow [2024-06-28 00:24:56,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:56,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:56,312 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] [2024-06-28 00:24:56,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 00:24:56,312 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:56,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:56,312 INFO L85 PathProgramCache]: Analyzing trace with hash -847215645, now seen corresponding path program 24 times [2024-06-28 00:24:56,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:56,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876106666] [2024-06-28 00:24:56,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:56,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:56,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:56,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876106666] [2024-06-28 00:24:56,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876106666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:56,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:56,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:56,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661976655] [2024-06-28 00:24:56,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:56,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:56,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:56,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:56,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:56,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:24:56,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 589 transitions, 9348 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:56,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:56,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:24:56,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:58,336 INFO L124 PetriNetUnfolderBase]: 3137/5511 cut-off events. [2024-06-28 00:24:58,336 INFO L125 PetriNetUnfolderBase]: For 239457/239489 co-relation queries the response was YES. [2024-06-28 00:24:58,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36304 conditions, 5511 events. 3137/5511 cut-off events. For 239457/239489 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 40718 event pairs, 793 based on Foata normal form. 26/5477 useless extension candidates. Maximal degree in co-relation 36134. Up to 4708 conditions per place. [2024-06-28 00:24:58,413 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 510 selfloop transitions, 88 changer transitions 0/605 dead transitions. [2024-06-28 00:24:58,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 605 transitions, 10594 flow [2024-06-28 00:24:58,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:24:58,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:24:58,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 193 transitions. [2024-06-28 00:24:58,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38293650793650796 [2024-06-28 00:24:58,414 INFO L175 Difference]: Start difference. First operand has 436 places, 589 transitions, 9348 flow. Second operand 12 states and 193 transitions. [2024-06-28 00:24:58,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 605 transitions, 10594 flow [2024-06-28 00:25:00,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 605 transitions, 10426 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 00:25:00,229 INFO L231 Difference]: Finished difference. Result has 442 places, 589 transitions, 9362 flow [2024-06-28 00:25:00,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9180, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9362, PETRI_PLACES=442, PETRI_TRANSITIONS=589} [2024-06-28 00:25:00,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-28 00:25:00,230 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 589 transitions, 9362 flow [2024-06-28 00:25:00,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:00,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:00,230 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] [2024-06-28 00:25:00,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 00:25:00,230 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:00,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:00,230 INFO L85 PathProgramCache]: Analyzing trace with hash -847221225, now seen corresponding path program 25 times [2024-06-28 00:25:00,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:00,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403865055] [2024-06-28 00:25:00,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:00,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:00,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:00,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403865055] [2024-06-28 00:25:00,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403865055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:00,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:00,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:25:00,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761293153] [2024-06-28 00:25:00,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:00,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:25:00,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:00,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:25:00,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:25:00,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:25:00,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 589 transitions, 9362 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:00,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:00,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:25:00,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:02,270 INFO L124 PetriNetUnfolderBase]: 3134/5511 cut-off events. [2024-06-28 00:25:02,271 INFO L125 PetriNetUnfolderBase]: For 240957/240989 co-relation queries the response was YES. [2024-06-28 00:25:02,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36252 conditions, 5511 events. 3134/5511 cut-off events. For 240957/240989 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 40722 event pairs, 789 based on Foata normal form. 26/5479 useless extension candidates. Maximal degree in co-relation 36081. Up to 4694 conditions per place. [2024-06-28 00:25:02,346 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 502 selfloop transitions, 97 changer transitions 0/606 dead transitions. [2024-06-28 00:25:02,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 606 transitions, 10774 flow [2024-06-28 00:25:02,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:25:02,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:25:02,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-28 00:25:02,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-28 00:25:02,347 INFO L175 Difference]: Start difference. First operand has 442 places, 589 transitions, 9362 flow. Second operand 11 states and 185 transitions. [2024-06-28 00:25:02,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 606 transitions, 10774 flow [2024-06-28 00:25:03,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 606 transitions, 10372 flow, removed 33 selfloop flow, removed 13 redundant places. [2024-06-28 00:25:04,002 INFO L231 Difference]: Finished difference. Result has 440 places, 589 transitions, 9160 flow [2024-06-28 00:25:04,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8960, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9160, PETRI_PLACES=440, PETRI_TRANSITIONS=589} [2024-06-28 00:25:04,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-28 00:25:04,003 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 589 transitions, 9160 flow [2024-06-28 00:25:04,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:04,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:04,003 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] [2024-06-28 00:25:04,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 00:25:04,003 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:04,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:04,003 INFO L85 PathProgramCache]: Analyzing trace with hash -839863995, now seen corresponding path program 26 times [2024-06-28 00:25:04,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:04,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824126800] [2024-06-28 00:25:04,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:04,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:04,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:04,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824126800] [2024-06-28 00:25:04,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824126800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:04,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:04,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:25:04,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896452384] [2024-06-28 00:25:04,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:04,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:25:04,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:04,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:25:04,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:25:04,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:25:04,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 589 transitions, 9160 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:04,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:04,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:25:04,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:05,937 INFO L124 PetriNetUnfolderBase]: 3131/5509 cut-off events. [2024-06-28 00:25:05,937 INFO L125 PetriNetUnfolderBase]: For 241953/241985 co-relation queries the response was YES. [2024-06-28 00:25:05,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35866 conditions, 5509 events. 3131/5509 cut-off events. For 241953/241985 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 40736 event pairs, 791 based on Foata normal form. 26/5479 useless extension candidates. Maximal degree in co-relation 35697. Up to 4700 conditions per place. [2024-06-28 00:25:06,016 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 509 selfloop transitions, 87 changer transitions 0/603 dead transitions. [2024-06-28 00:25:06,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 603 transitions, 10398 flow [2024-06-28 00:25:06,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:25:06,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:25:06,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-28 00:25:06,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-28 00:25:06,017 INFO L175 Difference]: Start difference. First operand has 440 places, 589 transitions, 9160 flow. Second operand 9 states and 155 transitions. [2024-06-28 00:25:06,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 603 transitions, 10398 flow [2024-06-28 00:25:07,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 603 transitions, 10089 flow, removed 39 selfloop flow, removed 11 redundant places. [2024-06-28 00:25:07,638 INFO L231 Difference]: Finished difference. Result has 438 places, 589 transitions, 9031 flow [2024-06-28 00:25:07,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8851, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9031, PETRI_PLACES=438, PETRI_TRANSITIONS=589} [2024-06-28 00:25:07,638 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-28 00:25:07,638 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 589 transitions, 9031 flow [2024-06-28 00:25:07,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:07,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:07,639 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] [2024-06-28 00:25:07,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 00:25:07,639 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:07,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:07,639 INFO L85 PathProgramCache]: Analyzing trace with hash 779554332, now seen corresponding path program 1 times [2024-06-28 00:25:07,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:07,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603923513] [2024-06-28 00:25:07,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:07,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:07,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:09,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:09,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603923513] [2024-06-28 00:25:09,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603923513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:09,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:09,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:25:09,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115749904] [2024-06-28 00:25:09,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:09,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:25:09,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:09,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:25:09,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:25:09,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:25:09,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 589 transitions, 9031 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) [2024-06-28 00:25:09,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:09,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:25:09,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:10,711 INFO L124 PetriNetUnfolderBase]: 3119/5454 cut-off events. [2024-06-28 00:25:10,711 INFO L125 PetriNetUnfolderBase]: For 244995/244995 co-relation queries the response was YES. [2024-06-28 00:25:10,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35317 conditions, 5454 events. 3119/5454 cut-off events. For 244995/244995 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 40113 event pairs, 1076 based on Foata normal form. 4/5402 useless extension candidates. Maximal degree in co-relation 35150. Up to 4666 conditions per place. [2024-06-28 00:25:10,777 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 549 selfloop transitions, 61 changer transitions 0/618 dead transitions. [2024-06-28 00:25:10,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 618 transitions, 10375 flow [2024-06-28 00:25:10,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:25:10,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:25:10,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-28 00:25:10,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-28 00:25:10,778 INFO L175 Difference]: Start difference. First operand has 438 places, 589 transitions, 9031 flow. Second operand 8 states and 163 transitions. [2024-06-28 00:25:10,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 618 transitions, 10375 flow [2024-06-28 00:25:12,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 618 transitions, 10201 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 00:25:12,105 INFO L231 Difference]: Finished difference. Result has 439 places, 589 transitions, 8985 flow [2024-06-28 00:25:12,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8857, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8985, PETRI_PLACES=439, PETRI_TRANSITIONS=589} [2024-06-28 00:25:12,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-28 00:25:12,106 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 589 transitions, 8985 flow [2024-06-28 00:25:12,106 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) [2024-06-28 00:25:12,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:12,106 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] [2024-06-28 00:25:12,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 00:25:12,106 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:12,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:12,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1821138908, now seen corresponding path program 2 times [2024-06-28 00:25:12,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:12,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801596157] [2024-06-28 00:25:12,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:12,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:13,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:13,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801596157] [2024-06-28 00:25:13,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801596157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:13,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:13,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:25:13,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124153571] [2024-06-28 00:25:13,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:13,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:25:13,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:13,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:25:13,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:25:13,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:25:13,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 589 transitions, 8985 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) [2024-06-28 00:25:13,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:13,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:25:13,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:14,576 INFO L124 PetriNetUnfolderBase]: 3131/5478 cut-off events. [2024-06-28 00:25:14,576 INFO L125 PetriNetUnfolderBase]: For 249690/249690 co-relation queries the response was YES. [2024-06-28 00:25:14,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35465 conditions, 5478 events. 3131/5478 cut-off events. For 249690/249690 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 40408 event pairs, 1098 based on Foata normal form. 4/5422 useless extension candidates. Maximal degree in co-relation 35298. Up to 4778 conditions per place. [2024-06-28 00:25:14,652 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 582 selfloop transitions, 24 changer transitions 0/614 dead transitions. [2024-06-28 00:25:14,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 614 transitions, 10307 flow [2024-06-28 00:25:14,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:25:14,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:25:14,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 00:25:14,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-28 00:25:14,653 INFO L175 Difference]: Start difference. First operand has 439 places, 589 transitions, 8985 flow. Second operand 9 states and 166 transitions. [2024-06-28 00:25:14,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 614 transitions, 10307 flow [2024-06-28 00:25:16,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 614 transitions, 10224 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-28 00:25:16,098 INFO L231 Difference]: Finished difference. Result has 444 places, 590 transitions, 8983 flow [2024-06-28 00:25:16,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8902, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8983, PETRI_PLACES=444, PETRI_TRANSITIONS=590} [2024-06-28 00:25:16,098 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-28 00:25:16,098 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 590 transitions, 8983 flow [2024-06-28 00:25:16,099 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) [2024-06-28 00:25:16,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:16,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:25:16,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-28 00:25:16,099 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:16,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:16,099 INFO L85 PathProgramCache]: Analyzing trace with hash 555972412, now seen corresponding path program 3 times [2024-06-28 00:25:16,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:16,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504463705] [2024-06-28 00:25:16,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:16,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:17,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:17,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:17,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504463705] [2024-06-28 00:25:17,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504463705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:17,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:17,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:25:17,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816981691] [2024-06-28 00:25:17,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:17,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:25:17,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:17,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:25:17,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:25:17,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:25:17,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 590 transitions, 8983 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:17,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:17,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:25:17,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:18,871 INFO L124 PetriNetUnfolderBase]: 3202/5582 cut-off events. [2024-06-28 00:25:18,871 INFO L125 PetriNetUnfolderBase]: For 289997/290003 co-relation queries the response was YES. [2024-06-28 00:25:18,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37348 conditions, 5582 events. 3202/5582 cut-off events. For 289997/290003 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 41267 event pairs, 999 based on Foata normal form. 10/5545 useless extension candidates. Maximal degree in co-relation 37179. Up to 3964 conditions per place. [2024-06-28 00:25:18,954 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 356 selfloop transitions, 257 changer transitions 0/620 dead transitions. [2024-06-28 00:25:18,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 620 transitions, 10653 flow [2024-06-28 00:25:18,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:25:18,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:25:18,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 00:25:18,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-28 00:25:18,955 INFO L175 Difference]: Start difference. First operand has 444 places, 590 transitions, 8983 flow. Second operand 9 states and 163 transitions. [2024-06-28 00:25:18,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 620 transitions, 10653 flow [2024-06-28 00:25:20,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 620 transitions, 10596 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-28 00:25:20,972 INFO L231 Difference]: Finished difference. Result has 447 places, 596 transitions, 9882 flow [2024-06-28 00:25:20,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8926, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9882, PETRI_PLACES=447, PETRI_TRANSITIONS=596} [2024-06-28 00:25:20,972 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 404 predicate places. [2024-06-28 00:25:20,972 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 596 transitions, 9882 flow [2024-06-28 00:25:20,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:20,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:20,972 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] [2024-06-28 00:25:20,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-28 00:25:20,972 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:20,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:20,973 INFO L85 PathProgramCache]: Analyzing trace with hash 362033002, now seen corresponding path program 4 times [2024-06-28 00:25:20,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:20,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018534462] [2024-06-28 00:25:20,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:20,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:22,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:22,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018534462] [2024-06-28 00:25:22,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018534462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:22,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:22,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:25:22,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201093742] [2024-06-28 00:25:22,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:22,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:25:22,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:22,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:25:22,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:25:22,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:25:22,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 596 transitions, 9882 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) [2024-06-28 00:25:22,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:22,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:25:22,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:23,565 INFO L124 PetriNetUnfolderBase]: 3207/5591 cut-off events. [2024-06-28 00:25:23,565 INFO L125 PetriNetUnfolderBase]: For 297056/297062 co-relation queries the response was YES. [2024-06-28 00:25:23,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39122 conditions, 5591 events. 3207/5591 cut-off events. For 297056/297062 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 41329 event pairs, 1000 based on Foata normal form. 10/5558 useless extension candidates. Maximal degree in co-relation 38951. Up to 3971 conditions per place. [2024-06-28 00:25:23,639 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 360 selfloop transitions, 255 changer transitions 0/623 dead transitions. [2024-06-28 00:25:23,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 623 transitions, 11472 flow [2024-06-28 00:25:23,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:25:23,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:25:23,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-28 00:25:23,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-28 00:25:23,640 INFO L175 Difference]: Start difference. First operand has 447 places, 596 transitions, 9882 flow. Second operand 8 states and 161 transitions. [2024-06-28 00:25:23,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 623 transitions, 11472 flow [2024-06-28 00:25:25,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 623 transitions, 11402 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 00:25:25,818 INFO L231 Difference]: Finished difference. Result has 451 places, 599 transitions, 10670 flow [2024-06-28 00:25:25,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9816, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10670, PETRI_PLACES=451, PETRI_TRANSITIONS=599} [2024-06-28 00:25:25,819 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-28 00:25:25,819 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 599 transitions, 10670 flow [2024-06-28 00:25:25,819 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) [2024-06-28 00:25:25,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:25,819 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, 1] [2024-06-28 00:25:25,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-28 00:25:25,819 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:25,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:25,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1486383829, now seen corresponding path program 1 times [2024-06-28 00:25:25,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:25,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851167722] [2024-06-28 00:25:25,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:25,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:26,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:26,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851167722] [2024-06-28 00:25:26,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851167722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:26,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:26,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:25:26,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44094211] [2024-06-28 00:25:26,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:26,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:25:26,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:26,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:25:26,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:25:26,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:25:26,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 599 transitions, 10670 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) [2024-06-28 00:25:26,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:26,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:25:26,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:28,305 INFO L124 PetriNetUnfolderBase]: 3239/5657 cut-off events. [2024-06-28 00:25:28,305 INFO L125 PetriNetUnfolderBase]: For 321362/321373 co-relation queries the response was YES. [2024-06-28 00:25:28,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41178 conditions, 5657 events. 3239/5657 cut-off events. For 321362/321373 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 41634 event pairs, 442 based on Foata normal form. 8/5595 useless extension candidates. Maximal degree in co-relation 41005. Up to 3825 conditions per place. [2024-06-28 00:25:28,392 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 458 selfloop transitions, 166 changer transitions 0/632 dead transitions. [2024-06-28 00:25:28,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 632 transitions, 12233 flow [2024-06-28 00:25:28,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:25:28,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:25:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-28 00:25:28,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170068027210885 [2024-06-28 00:25:28,396 INFO L175 Difference]: Start difference. First operand has 451 places, 599 transitions, 10670 flow. Second operand 7 states and 152 transitions. [2024-06-28 00:25:28,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 632 transitions, 12233 flow [2024-06-28 00:25:30,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 632 transitions, 12193 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-28 00:25:30,572 INFO L231 Difference]: Finished difference. Result has 456 places, 601 transitions, 11040 flow [2024-06-28 00:25:30,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10632, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11040, PETRI_PLACES=456, PETRI_TRANSITIONS=601} [2024-06-28 00:25:30,573 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 413 predicate places. [2024-06-28 00:25:30,573 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 601 transitions, 11040 flow [2024-06-28 00:25:30,573 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) [2024-06-28 00:25:30,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:30,573 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, 1] [2024-06-28 00:25:30,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-28 00:25:30,573 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:30,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:30,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1341276336, now seen corresponding path program 1 times [2024-06-28 00:25:30,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:30,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117585317] [2024-06-28 00:25:30,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:30,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:31,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:31,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:31,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117585317] [2024-06-28 00:25:31,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117585317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:31,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:31,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:25:31,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109824753] [2024-06-28 00:25:31,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:31,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:25:31,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:31,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:25:31,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:25:31,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:25:31,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 601 transitions, 11040 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:31,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:31,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:25:31,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:33,522 INFO L124 PetriNetUnfolderBase]: 3280/5708 cut-off events. [2024-06-28 00:25:33,523 INFO L125 PetriNetUnfolderBase]: For 340784/340790 co-relation queries the response was YES. [2024-06-28 00:25:33,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43116 conditions, 5708 events. 3280/5708 cut-off events. For 340784/340790 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 42093 event pairs, 516 based on Foata normal form. 8/5648 useless extension candidates. Maximal degree in co-relation 42939. Up to 4172 conditions per place. [2024-06-28 00:25:33,598 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 559 selfloop transitions, 96 changer transitions 0/662 dead transitions. [2024-06-28 00:25:33,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 662 transitions, 12995 flow [2024-06-28 00:25:33,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:25:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:25:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 218 transitions. [2024-06-28 00:25:33,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-28 00:25:33,598 INFO L175 Difference]: Start difference. First operand has 456 places, 601 transitions, 11040 flow. Second operand 12 states and 218 transitions. [2024-06-28 00:25:33,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 662 transitions, 12995 flow [2024-06-28 00:25:35,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 662 transitions, 12680 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 00:25:35,850 INFO L231 Difference]: Finished difference. Result has 467 places, 617 transitions, 11349 flow [2024-06-28 00:25:35,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10725, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11349, PETRI_PLACES=467, PETRI_TRANSITIONS=617} [2024-06-28 00:25:35,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-28 00:25:35,851 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 617 transitions, 11349 flow [2024-06-28 00:25:35,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:35,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:35,851 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, 1] [2024-06-28 00:25:35,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-28 00:25:35,851 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:35,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:35,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1175447615, now seen corresponding path program 2 times [2024-06-28 00:25:35,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:35,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588529760] [2024-06-28 00:25:35,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:35,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:36,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:36,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588529760] [2024-06-28 00:25:36,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588529760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:36,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:36,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:25:36,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121276888] [2024-06-28 00:25:36,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:36,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:25:36,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:36,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:25:36,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:25:36,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:25:36,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 617 transitions, 11349 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:36,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:36,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:25:36,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:38,306 INFO L124 PetriNetUnfolderBase]: 3300/5770 cut-off events. [2024-06-28 00:25:38,306 INFO L125 PetriNetUnfolderBase]: For 361079/361090 co-relation queries the response was YES. [2024-06-28 00:25:38,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43799 conditions, 5770 events. 3300/5770 cut-off events. For 361079/361090 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 42626 event pairs, 492 based on Foata normal form. 8/5719 useless extension candidates. Maximal degree in co-relation 43617. Up to 4600 conditions per place. [2024-06-28 00:25:38,398 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 537 selfloop transitions, 98 changer transitions 0/642 dead transitions. [2024-06-28 00:25:38,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 642 transitions, 12738 flow [2024-06-28 00:25:38,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:25:38,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:25:38,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 00:25:38,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 00:25:38,399 INFO L175 Difference]: Start difference. First operand has 467 places, 617 transitions, 11349 flow. Second operand 8 states and 146 transitions. [2024-06-28 00:25:38,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 642 transitions, 12738 flow [2024-06-28 00:25:40,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 642 transitions, 12530 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-28 00:25:40,532 INFO L231 Difference]: Finished difference. Result has 472 places, 620 transitions, 11419 flow [2024-06-28 00:25:40,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11141, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11419, PETRI_PLACES=472, PETRI_TRANSITIONS=620} [2024-06-28 00:25:40,532 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-28 00:25:40,532 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 620 transitions, 11419 flow [2024-06-28 00:25:40,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:40,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:40,533 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, 1] [2024-06-28 00:25:40,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-28 00:25:40,533 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:40,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:40,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1345000986, now seen corresponding path program 2 times [2024-06-28 00:25:40,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:40,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649420252] [2024-06-28 00:25:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:40,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:41,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:41,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649420252] [2024-06-28 00:25:41,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649420252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:41,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:41,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:25:41,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182759190] [2024-06-28 00:25:41,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:41,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:25:41,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:41,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:25:41,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:25:41,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:25:41,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 620 transitions, 11419 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:41,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:41,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:25:41,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:42,738 INFO L124 PetriNetUnfolderBase]: 3313/5791 cut-off events. [2024-06-28 00:25:42,738 INFO L125 PetriNetUnfolderBase]: For 358986/358994 co-relation queries the response was YES. [2024-06-28 00:25:42,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43811 conditions, 5791 events. 3313/5791 cut-off events. For 358986/358994 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 42768 event pairs, 509 based on Foata normal form. 4/5737 useless extension candidates. Maximal degree in co-relation 43627. Up to 4671 conditions per place. [2024-06-28 00:25:42,829 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 551 selfloop transitions, 90 changer transitions 0/648 dead transitions. [2024-06-28 00:25:42,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 648 transitions, 12918 flow [2024-06-28 00:25:42,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:25:42,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:25:42,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 00:25:42,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 00:25:42,830 INFO L175 Difference]: Start difference. First operand has 472 places, 620 transitions, 11419 flow. Second operand 8 states and 146 transitions. [2024-06-28 00:25:42,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 648 transitions, 12918 flow [2024-06-28 00:25:45,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 648 transitions, 12683 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-28 00:25:45,686 INFO L231 Difference]: Finished difference. Result has 474 places, 627 transitions, 11552 flow [2024-06-28 00:25:45,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11184, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11552, PETRI_PLACES=474, PETRI_TRANSITIONS=627} [2024-06-28 00:25:45,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 431 predicate places. [2024-06-28 00:25:45,686 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 627 transitions, 11552 flow [2024-06-28 00:25:45,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:45,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:45,686 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, 1] [2024-06-28 00:25:45,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-28 00:25:45,686 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:45,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:45,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1344995406, now seen corresponding path program 3 times [2024-06-28 00:25:45,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:45,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433393481] [2024-06-28 00:25:45,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:45,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:46,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:46,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433393481] [2024-06-28 00:25:46,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433393481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:46,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:46,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:25:46,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705068108] [2024-06-28 00:25:46,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:46,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:25:46,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:46,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:25:46,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:25:46,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:25:46,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 627 transitions, 11552 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:46,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:46,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:25:46,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:48,155 INFO L124 PetriNetUnfolderBase]: 3364/5864 cut-off events. [2024-06-28 00:25:48,156 INFO L125 PetriNetUnfolderBase]: For 377894/377902 co-relation queries the response was YES. [2024-06-28 00:25:48,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45028 conditions, 5864 events. 3364/5864 cut-off events. For 377894/377902 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 43338 event pairs, 447 based on Foata normal form. 4/5812 useless extension candidates. Maximal degree in co-relation 44845. Up to 4075 conditions per place. [2024-06-28 00:25:48,252 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 476 selfloop transitions, 183 changer transitions 0/666 dead transitions. [2024-06-28 00:25:48,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 666 transitions, 13429 flow [2024-06-28 00:25:48,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:25:48,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:25:48,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 00:25:48,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-28 00:25:48,253 INFO L175 Difference]: Start difference. First operand has 474 places, 627 transitions, 11552 flow. Second operand 9 states and 172 transitions. [2024-06-28 00:25:48,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 666 transitions, 13429 flow [2024-06-28 00:25:50,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 666 transitions, 13244 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 00:25:50,961 INFO L231 Difference]: Finished difference. Result has 479 places, 638 transitions, 12102 flow [2024-06-28 00:25:50,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11367, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12102, PETRI_PLACES=479, PETRI_TRANSITIONS=638} [2024-06-28 00:25:50,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-28 00:25:50,962 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 638 transitions, 12102 flow [2024-06-28 00:25:50,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:50,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:50,962 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, 1] [2024-06-28 00:25:50,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-28 00:25:50,962 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:50,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:50,963 INFO L85 PathProgramCache]: Analyzing trace with hash 62855768, now seen corresponding path program 4 times [2024-06-28 00:25:50,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:50,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013183771] [2024-06-28 00:25:50,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:50,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:51,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:51,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013183771] [2024-06-28 00:25:51,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013183771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:51,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:51,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:25:51,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955601201] [2024-06-28 00:25:51,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:51,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:25:51,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:51,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:25:51,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:25:51,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:25:51,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 638 transitions, 12102 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:51,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:51,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:25:51,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:53,740 INFO L124 PetriNetUnfolderBase]: 3392/5906 cut-off events. [2024-06-28 00:25:53,741 INFO L125 PetriNetUnfolderBase]: For 413550/413558 co-relation queries the response was YES. [2024-06-28 00:25:53,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46168 conditions, 5906 events. 3392/5906 cut-off events. For 413550/413558 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 43511 event pairs, 432 based on Foata normal form. 10/5858 useless extension candidates. Maximal degree in co-relation 45983. Up to 4149 conditions per place. [2024-06-28 00:25:53,831 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 468 selfloop transitions, 199 changer transitions 0/674 dead transitions. [2024-06-28 00:25:53,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 674 transitions, 13690 flow [2024-06-28 00:25:53,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:25:53,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:25:53,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 208 transitions. [2024-06-28 00:25:53,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-28 00:25:53,832 INFO L175 Difference]: Start difference. First operand has 479 places, 638 transitions, 12102 flow. Second operand 12 states and 208 transitions. [2024-06-28 00:25:53,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 674 transitions, 13690 flow [2024-06-28 00:25:56,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 674 transitions, 13336 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-28 00:25:56,831 INFO L231 Difference]: Finished difference. Result has 485 places, 642 transitions, 12336 flow [2024-06-28 00:25:56,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11748, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12336, PETRI_PLACES=485, PETRI_TRANSITIONS=642} [2024-06-28 00:25:56,831 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 442 predicate places. [2024-06-28 00:25:56,831 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 642 transitions, 12336 flow [2024-06-28 00:25:56,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:56,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:56,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:25:56,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-28 00:25:56,832 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:56,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:56,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1483534122, now seen corresponding path program 5 times [2024-06-28 00:25:56,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:56,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447864793] [2024-06-28 00:25:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:56,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:57,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:57,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447864793] [2024-06-28 00:25:57,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447864793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:57,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:57,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:25:57,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965042425] [2024-06-28 00:25:57,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:57,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:25:57,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:57,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:25:57,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:25:57,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:25:57,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 642 transitions, 12336 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:57,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:57,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:25:57,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:59,237 INFO L124 PetriNetUnfolderBase]: 3429/5965 cut-off events. [2024-06-28 00:25:59,237 INFO L125 PetriNetUnfolderBase]: For 406228/406236 co-relation queries the response was YES. [2024-06-28 00:25:59,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47293 conditions, 5965 events. 3429/5965 cut-off events. For 406228/406236 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 44117 event pairs, 531 based on Foata normal form. 4/5911 useless extension candidates. Maximal degree in co-relation 47107. Up to 4621 conditions per place. [2024-06-28 00:25:59,328 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 525 selfloop transitions, 147 changer transitions 0/679 dead transitions. [2024-06-28 00:25:59,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 679 transitions, 14265 flow [2024-06-28 00:25:59,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:25:59,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:25:59,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-28 00:25:59,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-28 00:25:59,329 INFO L175 Difference]: Start difference. First operand has 485 places, 642 transitions, 12336 flow. Second operand 10 states and 177 transitions. [2024-06-28 00:25:59,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 679 transitions, 14265 flow [2024-06-28 00:26:02,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 679 transitions, 13844 flow, removed 72 selfloop flow, removed 10 redundant places. [2024-06-28 00:26:02,022 INFO L231 Difference]: Finished difference. Result has 488 places, 652 transitions, 12654 flow [2024-06-28 00:26:02,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11969, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12654, PETRI_PLACES=488, PETRI_TRANSITIONS=652} [2024-06-28 00:26:02,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-28 00:26:02,022 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 652 transitions, 12654 flow [2024-06-28 00:26:02,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:26:02,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:26:02,022 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, 1] [2024-06-28 00:26:02,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-28 00:26:02,023 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:26:02,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:26:02,023 INFO L85 PathProgramCache]: Analyzing trace with hash -632118099, now seen corresponding path program 3 times [2024-06-28 00:26:02,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:26:02,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169738274] [2024-06-28 00:26:02,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:26:02,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:26:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:26:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:26:02,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:26:02,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169738274] [2024-06-28 00:26:02,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169738274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:26:02,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:26:02,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:26:02,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764798162] [2024-06-28 00:26:02,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:26:02,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:26:02,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:26:02,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:26:02,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:26:02,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:26:02,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 652 transitions, 12654 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) [2024-06-28 00:26:02,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:26:02,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:26:02,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:26:04,669 INFO L124 PetriNetUnfolderBase]: 3441/5991 cut-off events. [2024-06-28 00:26:04,669 INFO L125 PetriNetUnfolderBase]: For 403885/403896 co-relation queries the response was YES. [2024-06-28 00:26:04,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47186 conditions, 5991 events. 3441/5991 cut-off events. For 403885/403896 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 44345 event pairs, 530 based on Foata normal form. 8/5943 useless extension candidates. Maximal degree in co-relation 46999. Up to 4715 conditions per place. [2024-06-28 00:26:04,754 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 529 selfloop transitions, 142 changer transitions 0/679 dead transitions. [2024-06-28 00:26:04,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 679 transitions, 14137 flow [2024-06-28 00:26:04,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:26:04,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:26:04,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-28 00:26:04,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-28 00:26:04,755 INFO L175 Difference]: Start difference. First operand has 488 places, 652 transitions, 12654 flow. Second operand 8 states and 157 transitions. [2024-06-28 00:26:04,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 679 transitions, 14137 flow [2024-06-28 00:26:07,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 679 transitions, 13991 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-28 00:26:07,940 INFO L231 Difference]: Finished difference. Result has 492 places, 656 transitions, 12948 flow [2024-06-28 00:26:07,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12508, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12948, PETRI_PLACES=492, PETRI_TRANSITIONS=656} [2024-06-28 00:26:07,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 449 predicate places. [2024-06-28 00:26:07,941 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 656 transitions, 12948 flow [2024-06-28 00:26:07,941 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) [2024-06-28 00:26:07,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:26:07,941 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, 1] [2024-06-28 00:26:07,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-28 00:26:07,941 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:26:07,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:26:07,942 INFO L85 PathProgramCache]: Analyzing trace with hash -798018598, now seen corresponding path program 6 times [2024-06-28 00:26:07,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:26:07,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433027158] [2024-06-28 00:26:07,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:26:07,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:26:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:26:08,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:26:08,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:26:08,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433027158] [2024-06-28 00:26:08,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433027158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:26:08,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:26:08,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:26:08,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439198755] [2024-06-28 00:26:08,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:26:08,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:26:08,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:26:08,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:26:08,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:26:08,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:26:08,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 656 transitions, 12948 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:26:08,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:26:08,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:26:08,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:26:10,592 INFO L124 PetriNetUnfolderBase]: 3464/6028 cut-off events. [2024-06-28 00:26:10,593 INFO L125 PetriNetUnfolderBase]: For 430708/430716 co-relation queries the response was YES. [2024-06-28 00:26:10,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48119 conditions, 6028 events. 3464/6028 cut-off events. For 430708/430716 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 44609 event pairs, 433 based on Foata normal form. 12/5986 useless extension candidates. Maximal degree in co-relation 47929. Up to 4257 conditions per place. [2024-06-28 00:26:10,691 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 493 selfloop transitions, 194 changer transitions 0/694 dead transitions. [2024-06-28 00:26:10,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 694 transitions, 14600 flow [2024-06-28 00:26:10,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:26:10,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:26:10,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-28 00:26:10,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-28 00:26:10,692 INFO L175 Difference]: Start difference. First operand has 492 places, 656 transitions, 12948 flow. Second operand 11 states and 201 transitions. [2024-06-28 00:26:10,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 694 transitions, 14600 flow [2024-06-28 00:26:14,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 694 transitions, 14416 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-28 00:26:14,429 INFO L231 Difference]: Finished difference. Result has 499 places, 660 transitions, 13356 flow [2024-06-28 00:26:14,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12764, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13356, PETRI_PLACES=499, PETRI_TRANSITIONS=660} [2024-06-28 00:26:14,429 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 456 predicate places. [2024-06-28 00:26:14,429 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 660 transitions, 13356 flow [2024-06-28 00:26:14,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:26:14,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:26:14,430 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, 1] [2024-06-28 00:26:14,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-28 00:26:14,430 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:26:14,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:26:14,430 INFO L85 PathProgramCache]: Analyzing trace with hash 751946265, now seen corresponding path program 4 times [2024-06-28 00:26:14,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:26:14,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080204383] [2024-06-28 00:26:14,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:26:14,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:26:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:26:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:26:15,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:26:15,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080204383] [2024-06-28 00:26:15,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080204383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:26:15,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:26:15,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:26:15,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803356448] [2024-06-28 00:26:15,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:26:15,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:26:15,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:26:15,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:26:15,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:26:15,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:26:15,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 660 transitions, 13356 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) [2024-06-28 00:26:15,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:26:15,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:26:15,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:26:17,413 INFO L124 PetriNetUnfolderBase]: 3556/6214 cut-off events. [2024-06-28 00:26:17,414 INFO L125 PetriNetUnfolderBase]: For 445597/445603 co-relation queries the response was YES. [2024-06-28 00:26:17,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49981 conditions, 6214 events. 3556/6214 cut-off events. For 445597/445603 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 46673 event pairs, 389 based on Foata normal form. 4/6188 useless extension candidates. Maximal degree in co-relation 49791. Up to 3513 conditions per place. [2024-06-28 00:26:17,512 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 471 selfloop transitions, 220 changer transitions 0/699 dead transitions. [2024-06-28 00:26:17,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 699 transitions, 15284 flow [2024-06-28 00:26:17,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:26:17,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:26:17,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-28 00:26:17,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-06-28 00:26:17,514 INFO L175 Difference]: Start difference. First operand has 499 places, 660 transitions, 13356 flow. Second operand 8 states and 166 transitions. [2024-06-28 00:26:17,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 699 transitions, 15284 flow [2024-06-28 00:26:21,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 699 transitions, 14807 flow, removed 57 selfloop flow, removed 10 redundant places. [2024-06-28 00:26:21,091 INFO L231 Difference]: Finished difference. Result has 498 places, 665 transitions, 13420 flow [2024-06-28 00:26:21,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12883, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13420, PETRI_PLACES=498, PETRI_TRANSITIONS=665} [2024-06-28 00:26:21,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 455 predicate places. [2024-06-28 00:26:21,092 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 665 transitions, 13420 flow [2024-06-28 00:26:21,092 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) [2024-06-28 00:26:21,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:26:21,092 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, 1] [2024-06-28 00:26:21,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-28 00:26:21,092 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:26:21,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:26:21,092 INFO L85 PathProgramCache]: Analyzing trace with hash 993785789, now seen corresponding path program 5 times [2024-06-28 00:26:21,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:26:21,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049534260] [2024-06-28 00:26:21,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:26:21,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:26:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:26:22,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:26:22,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:26:22,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049534260] [2024-06-28 00:26:22,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049534260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:26:22,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:26:22,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:26:22,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750534851] [2024-06-28 00:26:22,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:26:22,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:26:22,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:26:22,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:26:22,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:26:22,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:26:22,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 665 transitions, 13420 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) [2024-06-28 00:26:22,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:26:22,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:26:22,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:26:23,789 INFO L124 PetriNetUnfolderBase]: 3568/6246 cut-off events. [2024-06-28 00:26:23,789 INFO L125 PetriNetUnfolderBase]: For 443254/443265 co-relation queries the response was YES. [2024-06-28 00:26:23,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50121 conditions, 6246 events. 3568/6246 cut-off events. For 443254/443265 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 46904 event pairs, 514 based on Foata normal form. 8/6218 useless extension candidates. Maximal degree in co-relation 49931. Up to 4437 conditions per place. [2024-06-28 00:26:23,899 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 525 selfloop transitions, 170 changer transitions 0/703 dead transitions. [2024-06-28 00:26:23,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 703 transitions, 15144 flow [2024-06-28 00:26:23,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:26:23,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:26:23,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-28 00:26:23,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-06-28 00:26:23,900 INFO L175 Difference]: Start difference. First operand has 498 places, 665 transitions, 13420 flow. Second operand 8 states and 166 transitions. [2024-06-28 00:26:23,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 703 transitions, 15144 flow [2024-06-28 00:26:26,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 703 transitions, 14825 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-28 00:26:26,923 INFO L231 Difference]: Finished difference. Result has 503 places, 666 transitions, 13473 flow [2024-06-28 00:26:26,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13105, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13473, PETRI_PLACES=503, PETRI_TRANSITIONS=666} [2024-06-28 00:26:26,924 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 460 predicate places. [2024-06-28 00:26:26,924 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 666 transitions, 13473 flow [2024-06-28 00:26:26,924 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) [2024-06-28 00:26:26,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:26:26,924 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, 1] [2024-06-28 00:26:26,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-28 00:26:26,924 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:26:26,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:26:26,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1166574581, now seen corresponding path program 1 times [2024-06-28 00:26:26,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:26:26,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510320197] [2024-06-28 00:26:26,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:26:26,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:26:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:26:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:26:28,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:26:28,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510320197] [2024-06-28 00:26:28,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510320197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:26:28,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:26:28,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:26:28,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827498490] [2024-06-28 00:26:28,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:26:28,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:26:28,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:26:28,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:26:28,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:26:28,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:26:28,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 666 transitions, 13473 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) [2024-06-28 00:26:28,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:26:28,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:26:28,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:26:30,180 INFO L124 PetriNetUnfolderBase]: 3677/6459 cut-off events. [2024-06-28 00:26:30,180 INFO L125 PetriNetUnfolderBase]: For 488697/488714 co-relation queries the response was YES. [2024-06-28 00:26:30,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52283 conditions, 6459 events. 3677/6459 cut-off events. For 488697/488714 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 49270 event pairs, 906 based on Foata normal form. 20/6423 useless extension candidates. Maximal degree in co-relation 52091. Up to 4879 conditions per place. [2024-06-28 00:26:30,286 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 508 selfloop transitions, 200 changer transitions 0/716 dead transitions. [2024-06-28 00:26:30,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 716 transitions, 15622 flow [2024-06-28 00:26:30,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:26:30,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:26:30,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-28 00:26:30,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-28 00:26:30,287 INFO L175 Difference]: Start difference. First operand has 503 places, 666 transitions, 13473 flow. Second operand 10 states and 205 transitions. [2024-06-28 00:26:30,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 716 transitions, 15622 flow [2024-06-28 00:26:33,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 716 transitions, 15186 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-28 00:26:33,724 INFO L231 Difference]: Finished difference. Result has 508 places, 675 transitions, 13689 flow [2024-06-28 00:26:33,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13049, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13689, PETRI_PLACES=508, PETRI_TRANSITIONS=675} [2024-06-28 00:26:33,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 465 predicate places. [2024-06-28 00:26:33,724 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 675 transitions, 13689 flow [2024-06-28 00:26:33,724 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) [2024-06-28 00:26:33,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:26:33,725 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, 1] [2024-06-28 00:26:33,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-28 00:26:33,725 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:26:33,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:26:33,725 INFO L85 PathProgramCache]: Analyzing trace with hash 752244795, now seen corresponding path program 6 times [2024-06-28 00:26:33,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:26:33,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615118396] [2024-06-28 00:26:33,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:26:33,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:26:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:26:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:26:34,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:26:34,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615118396] [2024-06-28 00:26:34,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615118396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:26:34,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:26:34,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:26:34,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002757112] [2024-06-28 00:26:34,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:26:34,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:26:34,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:26:34,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:26:34,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:26:34,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:26:34,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 675 transitions, 13689 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) [2024-06-28 00:26:34,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:26:34,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:26:34,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:26:36,578 INFO L124 PetriNetUnfolderBase]: 3669/6403 cut-off events. [2024-06-28 00:26:36,579 INFO L125 PetriNetUnfolderBase]: For 470151/470157 co-relation queries the response was YES. [2024-06-28 00:26:36,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51843 conditions, 6403 events. 3669/6403 cut-off events. For 470151/470157 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 48323 event pairs, 413 based on Foata normal form. 4/6373 useless extension candidates. Maximal degree in co-relation 51649. Up to 3632 conditions per place. [2024-06-28 00:26:36,678 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 469 selfloop transitions, 228 changer transitions 0/705 dead transitions. [2024-06-28 00:26:36,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 705 transitions, 15539 flow [2024-06-28 00:26:36,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:26:36,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:26:36,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-28 00:26:36,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-28 00:26:36,679 INFO L175 Difference]: Start difference. First operand has 508 places, 675 transitions, 13689 flow. Second operand 8 states and 163 transitions. [2024-06-28 00:26:36,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 705 transitions, 15539 flow [2024-06-28 00:26:39,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 705 transitions, 15259 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-28 00:26:39,777 INFO L231 Difference]: Finished difference. Result has 511 places, 675 transitions, 13874 flow [2024-06-28 00:26:39,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13413, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13874, PETRI_PLACES=511, PETRI_TRANSITIONS=675} [2024-06-28 00:26:39,778 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 468 predicate places. [2024-06-28 00:26:39,778 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 675 transitions, 13874 flow [2024-06-28 00:26:39,778 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) [2024-06-28 00:26:39,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:26:39,778 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, 1] [2024-06-28 00:26:39,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-28 00:26:39,779 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:26:39,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:26:39,779 INFO L85 PathProgramCache]: Analyzing trace with hash 993875999, now seen corresponding path program 7 times [2024-06-28 00:26:39,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:26:39,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608922142] [2024-06-28 00:26:39,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:26:39,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:26:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:26:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:26:41,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:26:41,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608922142] [2024-06-28 00:26:41,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608922142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:26:41,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:26:41,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:26:41,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922246220] [2024-06-28 00:26:41,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:26:41,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:26:41,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:26:41,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:26:41,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:26:41,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:26:41,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 675 transitions, 13874 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) [2024-06-28 00:26:41,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:26:41,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:26:41,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:26:43,085 INFO L124 PetriNetUnfolderBase]: 3681/6431 cut-off events. [2024-06-28 00:26:43,085 INFO L125 PetriNetUnfolderBase]: For 471849/471860 co-relation queries the response was YES. [2024-06-28 00:26:43,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52598 conditions, 6431 events. 3681/6431 cut-off events. For 471849/471860 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 48421 event pairs, 557 based on Foata normal form. 8/6399 useless extension candidates. Maximal degree in co-relation 52403. Up to 4716 conditions per place. [2024-06-28 00:26:43,193 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 529 selfloop transitions, 170 changer transitions 0/707 dead transitions. [2024-06-28 00:26:43,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 707 transitions, 15408 flow [2024-06-28 00:26:43,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:26:43,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:26:43,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 00:26:43,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-28 00:26:43,194 INFO L175 Difference]: Start difference. First operand has 511 places, 675 transitions, 13874 flow. Second operand 8 states and 160 transitions. [2024-06-28 00:26:43,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 707 transitions, 15408 flow [2024-06-28 00:26:46,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 707 transitions, 14969 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 00:26:46,796 INFO L231 Difference]: Finished difference. Result has 514 places, 676 transitions, 13807 flow [2024-06-28 00:26:46,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13435, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13807, PETRI_PLACES=514, PETRI_TRANSITIONS=676} [2024-06-28 00:26:46,796 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 471 predicate places. [2024-06-28 00:26:46,796 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 676 transitions, 13807 flow [2024-06-28 00:26:46,797 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) [2024-06-28 00:26:46,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:26:46,797 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, 1] [2024-06-28 00:26:46,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-28 00:26:46,797 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:26:46,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:26:46,798 INFO L85 PathProgramCache]: Analyzing trace with hash 579546740, now seen corresponding path program 7 times [2024-06-28 00:26:46,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:26:46,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090429833] [2024-06-28 00:26:46,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:26:46,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:26:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:26:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:26:47,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:26:47,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090429833] [2024-06-28 00:26:47,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090429833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:26:47,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:26:47,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:26:47,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671703131] [2024-06-28 00:26:47,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:26:47,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:26:47,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:26:47,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:26:47,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:26:47,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:26:47,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 676 transitions, 13807 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) [2024-06-28 00:26:47,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:26:47,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:26:47,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:26:49,728 INFO L124 PetriNetUnfolderBase]: 3762/6578 cut-off events. [2024-06-28 00:26:49,728 INFO L125 PetriNetUnfolderBase]: For 565635/565646 co-relation queries the response was YES. [2024-06-28 00:26:49,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54145 conditions, 6578 events. 3762/6578 cut-off events. For 565635/565646 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 49782 event pairs, 553 based on Foata normal form. 22/6572 useless extension candidates. Maximal degree in co-relation 53949. Up to 4330 conditions per place. [2024-06-28 00:26:49,834 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 485 selfloop transitions, 228 changer transitions 13/734 dead transitions. [2024-06-28 00:26:49,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 734 transitions, 15915 flow [2024-06-28 00:26:49,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:26:49,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:26:49,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-28 00:26:49,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4653679653679654 [2024-06-28 00:26:49,834 INFO L175 Difference]: Start difference. First operand has 514 places, 676 transitions, 13807 flow. Second operand 11 states and 215 transitions. [2024-06-28 00:26:49,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 734 transitions, 15915 flow [2024-06-28 00:26:53,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 734 transitions, 15553 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 00:26:53,543 INFO L231 Difference]: Finished difference. Result has 521 places, 686 transitions, 14215 flow [2024-06-28 00:26:53,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13445, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14215, PETRI_PLACES=521, PETRI_TRANSITIONS=686} [2024-06-28 00:26:53,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 478 predicate places. [2024-06-28 00:26:53,544 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 686 transitions, 14215 flow [2024-06-28 00:26:53,544 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) [2024-06-28 00:26:53,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:26:53,544 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, 1] [2024-06-28 00:26:53,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-28 00:26:53,544 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:26:53,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:26:53,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1160019569, now seen corresponding path program 8 times [2024-06-28 00:26:53,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:26:53,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309785548] [2024-06-28 00:26:53,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:26:53,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:26:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:26:54,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:26:54,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:26:54,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309785548] [2024-06-28 00:26:54,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309785548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:26:54,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:26:54,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:26:54,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569734089] [2024-06-28 00:26:54,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:26:54,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:26:54,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:26:54,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:26:54,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:26:54,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:26:54,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 686 transitions, 14215 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) [2024-06-28 00:26:54,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:26:54,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:26:54,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:26:56,385 INFO L124 PetriNetUnfolderBase]: 3682/6440 cut-off events. [2024-06-28 00:26:56,385 INFO L125 PetriNetUnfolderBase]: For 501956/501962 co-relation queries the response was YES. [2024-06-28 00:26:56,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53670 conditions, 6440 events. 3682/6440 cut-off events. For 501956/501962 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 48688 event pairs, 513 based on Foata normal form. 4/6424 useless extension candidates. Maximal degree in co-relation 53471. Up to 4319 conditions per place. [2024-06-28 00:26:56,497 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 503 selfloop transitions, 210 changer transitions 0/721 dead transitions. [2024-06-28 00:26:56,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 721 transitions, 15759 flow [2024-06-28 00:26:56,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:26:56,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:26:56,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-28 00:26:56,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-06-28 00:26:56,498 INFO L175 Difference]: Start difference. First operand has 521 places, 686 transitions, 14215 flow. Second operand 8 states and 167 transitions. [2024-06-28 00:26:56,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 721 transitions, 15759 flow [2024-06-28 00:26:59,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 721 transitions, 15392 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-28 00:26:59,829 INFO L231 Difference]: Finished difference. Result has 517 places, 686 transitions, 14272 flow [2024-06-28 00:26:59,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13848, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14272, PETRI_PLACES=517, PETRI_TRANSITIONS=686} [2024-06-28 00:26:59,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 474 predicate places. [2024-06-28 00:26:59,829 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 686 transitions, 14272 flow [2024-06-28 00:26:59,829 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) [2024-06-28 00:26:59,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:26:59,830 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, 1] [2024-06-28 00:26:59,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-28 00:26:59,830 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:26:59,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:26:59,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1160109934, now seen corresponding path program 8 times [2024-06-28 00:26:59,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:26:59,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779430696] [2024-06-28 00:26:59,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:26:59,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:26:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:00,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:00,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779430696] [2024-06-28 00:27:00,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779430696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:00,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:00,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:27:00,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268056797] [2024-06-28 00:27:00,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:00,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:27:00,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:00,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:27:00,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:27:00,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:27:00,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 686 transitions, 14272 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) [2024-06-28 00:27:00,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:00,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:27:00,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:02,591 INFO L124 PetriNetUnfolderBase]: 3767/6577 cut-off events. [2024-06-28 00:27:02,592 INFO L125 PetriNetUnfolderBase]: For 501294/501300 co-relation queries the response was YES. [2024-06-28 00:27:02,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54696 conditions, 6577 events. 3767/6577 cut-off events. For 501294/501300 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 49615 event pairs, 514 based on Foata normal form. 2/6556 useless extension candidates. Maximal degree in co-relation 54499. Up to 3813 conditions per place. [2024-06-28 00:27:02,703 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 424 selfloop transitions, 304 changer transitions 0/736 dead transitions. [2024-06-28 00:27:02,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 736 transitions, 16467 flow [2024-06-28 00:27:02,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:27:02,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:27:02,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-28 00:27:02,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48095238095238096 [2024-06-28 00:27:02,704 INFO L175 Difference]: Start difference. First operand has 517 places, 686 transitions, 14272 flow. Second operand 10 states and 202 transitions. [2024-06-28 00:27:02,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 736 transitions, 16467 flow [2024-06-28 00:27:06,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 736 transitions, 15953 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 00:27:06,981 INFO L231 Difference]: Finished difference. Result has 521 places, 695 transitions, 14594 flow [2024-06-28 00:27:06,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13770, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14594, PETRI_PLACES=521, PETRI_TRANSITIONS=695} [2024-06-28 00:27:06,982 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 478 predicate places. [2024-06-28 00:27:06,982 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 695 transitions, 14594 flow [2024-06-28 00:27:06,982 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) [2024-06-28 00:27:06,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:06,982 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, 1] [2024-06-28 00:27:06,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-28 00:27:06,982 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:06,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:06,983 INFO L85 PathProgramCache]: Analyzing trace with hash 745780365, now seen corresponding path program 9 times [2024-06-28 00:27:06,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:06,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352097381] [2024-06-28 00:27:06,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:06,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:08,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:08,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352097381] [2024-06-28 00:27:08,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352097381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:08,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:08,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:27:08,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344838020] [2024-06-28 00:27:08,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:08,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:27:08,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:08,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:27:08,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:27:08,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:27:08,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 695 transitions, 14594 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) [2024-06-28 00:27:08,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:08,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:27:08,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:10,178 INFO L124 PetriNetUnfolderBase]: 3779/6625 cut-off events. [2024-06-28 00:27:10,179 INFO L125 PetriNetUnfolderBase]: For 521859/521865 co-relation queries the response was YES. [2024-06-28 00:27:10,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55316 conditions, 6625 events. 3779/6625 cut-off events. For 521859/521865 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 50417 event pairs, 534 based on Foata normal form. 4/6598 useless extension candidates. Maximal degree in co-relation 55117. Up to 4506 conditions per place. [2024-06-28 00:27:10,286 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 502 selfloop transitions, 216 changer transitions 0/726 dead transitions. [2024-06-28 00:27:10,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 726 transitions, 16156 flow [2024-06-28 00:27:10,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:27:10,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:27:10,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-28 00:27:10,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-28 00:27:10,287 INFO L175 Difference]: Start difference. First operand has 521 places, 695 transitions, 14594 flow. Second operand 8 states and 162 transitions. [2024-06-28 00:27:10,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 726 transitions, 16156 flow [2024-06-28 00:27:14,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 726 transitions, 15610 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-28 00:27:14,810 INFO L231 Difference]: Finished difference. Result has 524 places, 696 transitions, 14513 flow [2024-06-28 00:27:14,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14048, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14513, PETRI_PLACES=524, PETRI_TRANSITIONS=696} [2024-06-28 00:27:14,811 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 481 predicate places. [2024-06-28 00:27:14,811 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 696 transitions, 14513 flow [2024-06-28 00:27:14,811 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) [2024-06-28 00:27:14,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:14,811 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, 1] [2024-06-28 00:27:14,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-28 00:27:14,811 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:14,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:14,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1169364364, now seen corresponding path program 9 times [2024-06-28 00:27:14,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:14,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367459926] [2024-06-28 00:27:14,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:14,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:15,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:15,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367459926] [2024-06-28 00:27:15,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367459926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:15,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:15,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:27:15,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144136678] [2024-06-28 00:27:15,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:15,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:27:15,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:15,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:27:15,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:27:15,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:27:15,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 696 transitions, 14513 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) [2024-06-28 00:27:15,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:15,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:27:15,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:17,782 INFO L124 PetriNetUnfolderBase]: 3808/6664 cut-off events. [2024-06-28 00:27:17,783 INFO L125 PetriNetUnfolderBase]: For 530478/530484 co-relation queries the response was YES. [2024-06-28 00:27:17,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56044 conditions, 6664 events. 3808/6664 cut-off events. For 530478/530484 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 50614 event pairs, 513 based on Foata normal form. 2/6642 useless extension candidates. Maximal degree in co-relation 55843. Up to 3817 conditions per place. [2024-06-28 00:27:17,899 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 428 selfloop transitions, 302 changer transitions 0/738 dead transitions. [2024-06-28 00:27:17,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 738 transitions, 16687 flow [2024-06-28 00:27:17,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:27:17,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:27:17,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-28 00:27:17,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738095238095238 [2024-06-28 00:27:17,900 INFO L175 Difference]: Start difference. First operand has 524 places, 696 transitions, 14513 flow. Second operand 10 states and 199 transitions. [2024-06-28 00:27:17,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 738 transitions, 16687 flow [2024-06-28 00:27:22,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 738 transitions, 16230 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 00:27:22,244 INFO L231 Difference]: Finished difference. Result has 529 places, 702 transitions, 14843 flow [2024-06-28 00:27:22,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14060, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14843, PETRI_PLACES=529, PETRI_TRANSITIONS=702} [2024-06-28 00:27:22,245 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 486 predicate places. [2024-06-28 00:27:22,245 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 702 transitions, 14843 flow [2024-06-28 00:27:22,245 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) [2024-06-28 00:27:22,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:22,245 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, 1] [2024-06-28 00:27:22,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-28 00:27:22,245 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:22,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:22,245 INFO L85 PathProgramCache]: Analyzing trace with hash 2116464711, now seen corresponding path program 10 times [2024-06-28 00:27:22,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:22,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392167435] [2024-06-28 00:27:22,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:22,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:22,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:23,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:23,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392167435] [2024-06-28 00:27:23,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392167435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:23,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:23,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:27:23,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345720092] [2024-06-28 00:27:23,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:23,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:27:23,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:23,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:27:23,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:27:23,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:27:23,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 702 transitions, 14843 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) [2024-06-28 00:27:23,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:23,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:27:23,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:25,662 INFO L124 PetriNetUnfolderBase]: 3820/6704 cut-off events. [2024-06-28 00:27:25,662 INFO L125 PetriNetUnfolderBase]: For 552597/552603 co-relation queries the response was YES. [2024-06-28 00:27:25,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56888 conditions, 6704 events. 3820/6704 cut-off events. For 552597/552603 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 51228 event pairs, 525 based on Foata normal form. 4/6680 useless extension candidates. Maximal degree in co-relation 56685. Up to 4527 conditions per place. [2024-06-28 00:27:25,771 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 498 selfloop transitions, 223 changer transitions 0/729 dead transitions. [2024-06-28 00:27:25,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 729 transitions, 16397 flow [2024-06-28 00:27:25,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:27:25,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:27:25,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 00:27:25,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-28 00:27:25,772 INFO L175 Difference]: Start difference. First operand has 529 places, 702 transitions, 14843 flow. Second operand 8 states and 159 transitions. [2024-06-28 00:27:25,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 729 transitions, 16397 flow [2024-06-28 00:27:30,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 729 transitions, 15693 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-28 00:27:30,117 INFO L231 Difference]: Finished difference. Result has 530 places, 703 transitions, 14620 flow [2024-06-28 00:27:30,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14139, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14620, PETRI_PLACES=530, PETRI_TRANSITIONS=703} [2024-06-28 00:27:30,118 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 487 predicate places. [2024-06-28 00:27:30,118 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 703 transitions, 14620 flow [2024-06-28 00:27:30,118 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) [2024-06-28 00:27:30,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:30,118 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, 1] [2024-06-28 00:27:30,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-28 00:27:30,118 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:30,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:30,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1268350471, now seen corresponding path program 1 times [2024-06-28 00:27:30,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:30,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909837354] [2024-06-28 00:27:30,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:30,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:32,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:32,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909837354] [2024-06-28 00:27:32,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909837354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:32,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:32,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:27:32,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913461957] [2024-06-28 00:27:32,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:32,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:27:32,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:32,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:27:32,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:27:32,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:27:32,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 703 transitions, 14620 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) [2024-06-28 00:27:32,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:32,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:27:32,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:34,405 INFO L124 PetriNetUnfolderBase]: 3835/6763 cut-off events. [2024-06-28 00:27:34,405 INFO L125 PetriNetUnfolderBase]: For 569814/569831 co-relation queries the response was YES. [2024-06-28 00:27:34,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56447 conditions, 6763 events. 3835/6763 cut-off events. For 569814/569831 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 52054 event pairs, 992 based on Foata normal form. 22/6721 useless extension candidates. Maximal degree in co-relation 56243. Up to 5490 conditions per place. [2024-06-28 00:27:34,519 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 538 selfloop transitions, 189 changer transitions 0/735 dead transitions. [2024-06-28 00:27:34,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 735 transitions, 16468 flow [2024-06-28 00:27:34,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:27:34,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:27:34,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-28 00:27:34,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-28 00:27:34,520 INFO L175 Difference]: Start difference. First operand has 530 places, 703 transitions, 14620 flow. Second operand 10 states and 198 transitions. [2024-06-28 00:27:34,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 735 transitions, 16468 flow [2024-06-28 00:27:38,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 735 transitions, 15999 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-28 00:27:38,877 INFO L231 Difference]: Finished difference. Result has 534 places, 704 transitions, 14567 flow [2024-06-28 00:27:38,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14151, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14567, PETRI_PLACES=534, PETRI_TRANSITIONS=704} [2024-06-28 00:27:38,877 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 491 predicate places. [2024-06-28 00:27:38,877 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 704 transitions, 14567 flow [2024-06-28 00:27:38,878 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) [2024-06-28 00:27:38,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:38,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:27:38,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-28 00:27:38,878 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:38,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:38,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1169375524, now seen corresponding path program 10 times [2024-06-28 00:27:38,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:38,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317255719] [2024-06-28 00:27:38,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:38,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:38,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:40,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:40,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317255719] [2024-06-28 00:27:40,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317255719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:40,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:40,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:27:40,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283218187] [2024-06-28 00:27:40,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:40,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:27:40,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:40,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:27:40,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:27:40,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:27:40,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 704 transitions, 14567 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) [2024-06-28 00:27:40,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:40,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:27:40,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:42,390 INFO L124 PetriNetUnfolderBase]: 3830/6700 cut-off events. [2024-06-28 00:27:42,390 INFO L125 PetriNetUnfolderBase]: For 538524/538530 co-relation queries the response was YES. [2024-06-28 00:27:42,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55802 conditions, 6700 events. 3830/6700 cut-off events. For 538524/538530 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 50910 event pairs, 511 based on Foata normal form. 2/6679 useless extension candidates. Maximal degree in co-relation 55597. Up to 3858 conditions per place. [2024-06-28 00:27:42,512 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 426 selfloop transitions, 305 changer transitions 0/739 dead transitions. [2024-06-28 00:27:42,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 739 transitions, 16403 flow [2024-06-28 00:27:42,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:27:42,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:27:42,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-28 00:27:42,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-28 00:27:42,513 INFO L175 Difference]: Start difference. First operand has 534 places, 704 transitions, 14567 flow. Second operand 10 states and 198 transitions. [2024-06-28 00:27:42,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 739 transitions, 16403 flow [2024-06-28 00:27:46,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 739 transitions, 15995 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-28 00:27:46,393 INFO L231 Difference]: Finished difference. Result has 535 places, 704 transitions, 14776 flow [2024-06-28 00:27:46,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14161, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14776, PETRI_PLACES=535, PETRI_TRANSITIONS=704} [2024-06-28 00:27:46,393 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 492 predicate places. [2024-06-28 00:27:46,394 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 704 transitions, 14776 flow [2024-06-28 00:27:46,394 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) [2024-06-28 00:27:46,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:46,394 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, 1] [2024-06-28 00:27:46,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-28 00:27:46,394 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:46,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:46,395 INFO L85 PathProgramCache]: Analyzing trace with hash 997595224, now seen corresponding path program 11 times [2024-06-28 00:27:46,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:46,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342351124] [2024-06-28 00:27:46,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:46,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:47,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:47,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:47,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342351124] [2024-06-28 00:27:47,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342351124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:47,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:47,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:27:47,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730390536] [2024-06-28 00:27:47,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:47,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:27:47,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:47,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:27:47,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:27:47,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:27:47,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 704 transitions, 14776 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:47,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:47,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:27:47,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:49,126 INFO L124 PetriNetUnfolderBase]: 3851/6761 cut-off events. [2024-06-28 00:27:49,126 INFO L125 PetriNetUnfolderBase]: For 549123/549134 co-relation queries the response was YES. [2024-06-28 00:27:49,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57089 conditions, 6761 events. 3851/6761 cut-off events. For 549123/549134 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 51636 event pairs, 620 based on Foata normal form. 6/6710 useless extension candidates. Maximal degree in co-relation 56883. Up to 5397 conditions per place. [2024-06-28 00:27:49,238 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 653 selfloop transitions, 77 changer transitions 0/737 dead transitions. [2024-06-28 00:27:49,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 737 transitions, 16689 flow [2024-06-28 00:27:49,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:27:49,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:27:49,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 00:27:49,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-28 00:27:49,239 INFO L175 Difference]: Start difference. First operand has 535 places, 704 transitions, 14776 flow. Second operand 9 states and 161 transitions. [2024-06-28 00:27:49,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 737 transitions, 16689 flow [2024-06-28 00:27:53,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 737 transitions, 16091 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-28 00:27:53,703 INFO L231 Difference]: Finished difference. Result has 538 places, 709 transitions, 14520 flow [2024-06-28 00:27:53,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14184, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14520, PETRI_PLACES=538, PETRI_TRANSITIONS=709} [2024-06-28 00:27:53,703 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 495 predicate places. [2024-06-28 00:27:53,703 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 709 transitions, 14520 flow [2024-06-28 00:27:53,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:53,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:53,704 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, 1] [2024-06-28 00:27:53,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-28 00:27:53,704 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:53,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:53,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1169371091, now seen corresponding path program 2 times [2024-06-28 00:27:53,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:53,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333948239] [2024-06-28 00:27:53,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:53,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:55,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:55,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333948239] [2024-06-28 00:27:55,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333948239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:55,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:55,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:27:55,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391115051] [2024-06-28 00:27:55,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:55,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:27:55,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:55,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:27:55,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:27:55,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:27:55,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 709 transitions, 14520 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:55,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:55,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:27:55,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:57,647 INFO L124 PetriNetUnfolderBase]: 3930/6917 cut-off events. [2024-06-28 00:27:57,647 INFO L125 PetriNetUnfolderBase]: For 581737/581750 co-relation queries the response was YES. [2024-06-28 00:27:57,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57600 conditions, 6917 events. 3930/6917 cut-off events. For 581737/581750 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 53555 event pairs, 1026 based on Foata normal form. 18/6874 useless extension candidates. Maximal degree in co-relation 57391. Up to 5797 conditions per place. [2024-06-28 00:27:57,755 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 615 selfloop transitions, 142 changer transitions 0/764 dead transitions. [2024-06-28 00:27:57,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 764 transitions, 16529 flow [2024-06-28 00:27:57,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:27:57,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:27:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 218 transitions. [2024-06-28 00:27:57,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-28 00:27:57,756 INFO L175 Difference]: Start difference. First operand has 538 places, 709 transitions, 14520 flow. Second operand 12 states and 218 transitions. [2024-06-28 00:27:57,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 764 transitions, 16529 flow [2024-06-28 00:28:02,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 764 transitions, 16368 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-28 00:28:02,092 INFO L231 Difference]: Finished difference. Result has 549 places, 722 transitions, 15005 flow [2024-06-28 00:28:02,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14359, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15005, PETRI_PLACES=549, PETRI_TRANSITIONS=722} [2024-06-28 00:28:02,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 506 predicate places. [2024-06-28 00:28:02,092 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 722 transitions, 15005 flow [2024-06-28 00:28:02,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:02,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:02,093 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, 1] [2024-06-28 00:28:02,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-28 00:28:02,093 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:02,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:02,093 INFO L85 PathProgramCache]: Analyzing trace with hash -343409402, now seen corresponding path program 12 times [2024-06-28 00:28:02,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:02,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879613934] [2024-06-28 00:28:02,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:02,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:02,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:02,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:02,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879613934] [2024-06-28 00:28:02,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879613934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:02,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:02,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:28:02,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418698569] [2024-06-28 00:28:02,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:02,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:28:02,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:02,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:28:02,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:28:02,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:28:02,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 722 transitions, 15005 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:02,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:02,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:28:02,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:04,975 INFO L124 PetriNetUnfolderBase]: 3925/6897 cut-off events. [2024-06-28 00:28:04,976 INFO L125 PetriNetUnfolderBase]: For 558139/558150 co-relation queries the response was YES. [2024-06-28 00:28:05,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57756 conditions, 6897 events. 3925/6897 cut-off events. For 558139/558150 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 52846 event pairs, 636 based on Foata normal form. 6/6846 useless extension candidates. Maximal degree in co-relation 57542. Up to 5550 conditions per place. [2024-06-28 00:28:05,099 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 663 selfloop transitions, 79 changer transitions 0/749 dead transitions. [2024-06-28 00:28:05,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 749 transitions, 16583 flow [2024-06-28 00:28:05,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:28:05,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:28:05,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 00:28:05,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-28 00:28:05,100 INFO L175 Difference]: Start difference. First operand has 549 places, 722 transitions, 15005 flow. Second operand 9 states and 158 transitions. [2024-06-28 00:28:05,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 749 transitions, 16583 flow [2024-06-28 00:28:10,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 749 transitions, 16402 flow, removed 83 selfloop flow, removed 2 redundant places. [2024-06-28 00:28:10,105 INFO L231 Difference]: Finished difference. Result has 556 places, 722 transitions, 14987 flow [2024-06-28 00:28:10,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14824, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14987, PETRI_PLACES=556, PETRI_TRANSITIONS=722} [2024-06-28 00:28:10,105 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 513 predicate places. [2024-06-28 00:28:10,105 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 722 transitions, 14987 flow [2024-06-28 00:28:10,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:10,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:10,106 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, 1] [2024-06-28 00:28:10,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-28 00:28:10,106 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:10,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:10,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1169370719, now seen corresponding path program 11 times [2024-06-28 00:28:10,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:10,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590864432] [2024-06-28 00:28:10,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:10,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:11,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:11,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590864432] [2024-06-28 00:28:11,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590864432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:11,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:11,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:28:11,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414068845] [2024-06-28 00:28:11,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:11,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:28:11,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:11,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:28:11,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:28:11,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:28:11,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 722 transitions, 14987 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) [2024-06-28 00:28:11,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:11,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:28:11,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:13,677 INFO L124 PetriNetUnfolderBase]: 3917/6869 cut-off events. [2024-06-28 00:28:13,677 INFO L125 PetriNetUnfolderBase]: For 561001/561007 co-relation queries the response was YES. [2024-06-28 00:28:13,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57455 conditions, 6869 events. 3917/6869 cut-off events. For 561001/561007 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 52585 event pairs, 521 based on Foata normal form. 4/6843 useless extension candidates. Maximal degree in co-relation 57240. Up to 4564 conditions per place. [2024-06-28 00:28:13,786 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 509 selfloop transitions, 230 changer transitions 0/747 dead transitions. [2024-06-28 00:28:13,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 747 transitions, 16547 flow [2024-06-28 00:28:13,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:28:13,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:28:13,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-28 00:28:13,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2024-06-28 00:28:13,787 INFO L175 Difference]: Start difference. First operand has 556 places, 722 transitions, 14987 flow. Second operand 7 states and 146 transitions. [2024-06-28 00:28:13,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 747 transitions, 16547 flow [2024-06-28 00:28:18,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 747 transitions, 16373 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 00:28:18,429 INFO L231 Difference]: Finished difference. Result has 555 places, 722 transitions, 15287 flow [2024-06-28 00:28:18,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14813, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15287, PETRI_PLACES=555, PETRI_TRANSITIONS=722} [2024-06-28 00:28:18,429 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 512 predicate places. [2024-06-28 00:28:18,429 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 722 transitions, 15287 flow [2024-06-28 00:28:18,429 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) [2024-06-28 00:28:18,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:18,430 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, 1] [2024-06-28 00:28:18,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-28 00:28:18,430 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:18,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:18,430 INFO L85 PathProgramCache]: Analyzing trace with hash 997595069, now seen corresponding path program 12 times [2024-06-28 00:28:18,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:18,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039975717] [2024-06-28 00:28:18,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:18,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:19,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:19,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039975717] [2024-06-28 00:28:19,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039975717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:19,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:19,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:28:19,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14659580] [2024-06-28 00:28:19,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:19,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:28:19,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:19,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:28:19,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:28:19,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:28:19,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 722 transitions, 15287 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:19,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:19,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:28:19,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:21,441 INFO L124 PetriNetUnfolderBase]: 3929/6903 cut-off events. [2024-06-28 00:28:21,441 INFO L125 PetriNetUnfolderBase]: For 569882/569893 co-relation queries the response was YES. [2024-06-28 00:28:21,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58174 conditions, 6903 events. 3929/6903 cut-off events. For 569882/569893 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 52942 event pairs, 636 based on Foata normal form. 8/6851 useless extension candidates. Maximal degree in co-relation 57958. Up to 5550 conditions per place. [2024-06-28 00:28:21,571 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 666 selfloop transitions, 78 changer transitions 0/751 dead transitions. [2024-06-28 00:28:21,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 751 transitions, 16881 flow [2024-06-28 00:28:21,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:28:21,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:28:21,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-28 00:28:21,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-28 00:28:21,572 INFO L175 Difference]: Start difference. First operand has 555 places, 722 transitions, 15287 flow. Second operand 10 states and 168 transitions. [2024-06-28 00:28:21,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 751 transitions, 16881 flow [2024-06-28 00:28:26,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 751 transitions, 16293 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-28 00:28:26,453 INFO L231 Difference]: Finished difference. Result has 558 places, 723 transitions, 14871 flow [2024-06-28 00:28:26,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14700, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14871, PETRI_PLACES=558, PETRI_TRANSITIONS=723} [2024-06-28 00:28:26,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 515 predicate places. [2024-06-28 00:28:26,454 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 723 transitions, 14871 flow [2024-06-28 00:28:26,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:26,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:26,454 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, 1] [2024-06-28 00:28:26,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-28 00:28:26,454 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:26,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:26,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1284666694, now seen corresponding path program 13 times [2024-06-28 00:28:26,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:26,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857489970] [2024-06-28 00:28:26,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:26,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:27,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:27,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857489970] [2024-06-28 00:28:27,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857489970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:27,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:27,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:28:27,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395125776] [2024-06-28 00:28:27,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:27,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:28:27,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:27,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:28:27,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:28:27,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:28:27,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 723 transitions, 14871 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:27,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:27,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:28:27,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:29,325 INFO L124 PetriNetUnfolderBase]: 4007/7013 cut-off events. [2024-06-28 00:28:29,326 INFO L125 PetriNetUnfolderBase]: For 592831/592837 co-relation queries the response was YES. [2024-06-28 00:28:29,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59294 conditions, 7013 events. 4007/7013 cut-off events. For 592831/592837 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 53683 event pairs, 597 based on Foata normal form. 2/6966 useless extension candidates. Maximal degree in co-relation 59078. Up to 5259 conditions per place. [2024-06-28 00:28:29,458 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 604 selfloop transitions, 155 changer transitions 0/766 dead transitions. [2024-06-28 00:28:29,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 766 transitions, 17408 flow [2024-06-28 00:28:29,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:28:29,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:28:29,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 00:28:29,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-28 00:28:29,459 INFO L175 Difference]: Start difference. First operand has 558 places, 723 transitions, 14871 flow. Second operand 9 states and 164 transitions. [2024-06-28 00:28:29,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 766 transitions, 17408 flow [2024-06-28 00:28:34,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 766 transitions, 17250 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 00:28:34,931 INFO L231 Difference]: Finished difference. Result has 562 places, 741 transitions, 15721 flow [2024-06-28 00:28:34,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14713, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15721, PETRI_PLACES=562, PETRI_TRANSITIONS=741} [2024-06-28 00:28:34,932 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 519 predicate places. [2024-06-28 00:28:34,932 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 741 transitions, 15721 flow [2024-06-28 00:28:34,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:34,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:34,932 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, 1] [2024-06-28 00:28:34,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-28 00:28:34,932 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:34,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:34,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1284662261, now seen corresponding path program 3 times [2024-06-28 00:28:34,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:34,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915197874] [2024-06-28 00:28:34,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:34,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:35,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:35,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915197874] [2024-06-28 00:28:35,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915197874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:35,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:35,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:28:35,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952034841] [2024-06-28 00:28:35,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:35,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:28:35,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:35,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:28:35,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:28:35,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:28:35,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 741 transitions, 15721 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) [2024-06-28 00:28:35,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:35,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:28:35,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:38,449 INFO L124 PetriNetUnfolderBase]: 4068/7158 cut-off events. [2024-06-28 00:28:38,449 INFO L125 PetriNetUnfolderBase]: For 661738/661755 co-relation queries the response was YES. [2024-06-28 00:28:38,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61703 conditions, 7158 events. 4068/7158 cut-off events. For 661738/661755 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 55568 event pairs, 1025 based on Foata normal form. 20/7118 useless extension candidates. Maximal degree in co-relation 61484. Up to 5971 conditions per place. [2024-06-28 00:28:38,575 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 669 selfloop transitions, 97 changer transitions 0/774 dead transitions. [2024-06-28 00:28:38,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 774 transitions, 17935 flow [2024-06-28 00:28:38,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:28:38,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:28:38,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-28 00:28:38,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-28 00:28:38,576 INFO L175 Difference]: Start difference. First operand has 562 places, 741 transitions, 15721 flow. Second operand 8 states and 163 transitions. [2024-06-28 00:28:38,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 774 transitions, 17935 flow [2024-06-28 00:28:44,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 774 transitions, 17748 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-06-28 00:28:44,846 INFO L231 Difference]: Finished difference. Result has 569 places, 746 transitions, 15916 flow [2024-06-28 00:28:44,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15534, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15916, PETRI_PLACES=569, PETRI_TRANSITIONS=746} [2024-06-28 00:28:44,846 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 526 predicate places. [2024-06-28 00:28:44,846 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 746 transitions, 15916 flow [2024-06-28 00:28:44,846 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) [2024-06-28 00:28:44,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:44,847 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, 1] [2024-06-28 00:28:44,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-28 00:28:44,847 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:44,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:44,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1284666911, now seen corresponding path program 4 times [2024-06-28 00:28:44,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:44,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528861132] [2024-06-28 00:28:44,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:44,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:45,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:45,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528861132] [2024-06-28 00:28:45,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528861132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:45,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:45,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:28:45,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925923270] [2024-06-28 00:28:45,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:45,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:28:45,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:45,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:28:45,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:28:45,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:28:45,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 746 transitions, 15916 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) [2024-06-28 00:28:45,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:45,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:28:45,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:47,800 INFO L124 PetriNetUnfolderBase]: 4088/7210 cut-off events. [2024-06-28 00:28:47,801 INFO L125 PetriNetUnfolderBase]: For 670979/670996 co-relation queries the response was YES. [2024-06-28 00:28:47,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62308 conditions, 7210 events. 4088/7210 cut-off events. For 670979/670996 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 56222 event pairs, 1049 based on Foata normal form. 20/7166 useless extension candidates. Maximal degree in co-relation 62086. Up to 6154 conditions per place. [2024-06-28 00:28:47,931 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 686 selfloop transitions, 75 changer transitions 0/769 dead transitions. [2024-06-28 00:28:47,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 769 transitions, 17586 flow [2024-06-28 00:28:47,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:28:47,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:28:47,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-28 00:28:47,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-28 00:28:47,932 INFO L175 Difference]: Start difference. First operand has 569 places, 746 transitions, 15916 flow. Second operand 8 states and 157 transitions. [2024-06-28 00:28:47,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 769 transitions, 17586 flow [2024-06-28 00:28:53,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 769 transitions, 17535 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-28 00:28:53,202 INFO L231 Difference]: Finished difference. Result has 575 places, 747 transitions, 16060 flow [2024-06-28 00:28:53,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15865, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16060, PETRI_PLACES=575, PETRI_TRANSITIONS=747} [2024-06-28 00:28:53,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 532 predicate places. [2024-06-28 00:28:53,203 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 747 transitions, 16060 flow [2024-06-28 00:28:53,203 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) [2024-06-28 00:28:53,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:53,203 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, 1] [2024-06-28 00:28:53,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-28 00:28:53,203 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:53,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:53,203 INFO L85 PathProgramCache]: Analyzing trace with hash 870152985, now seen corresponding path program 13 times [2024-06-28 00:28:53,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:53,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477022342] [2024-06-28 00:28:53,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:53,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:54,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:54,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477022342] [2024-06-28 00:28:54,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477022342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:54,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:54,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:28:54,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780171894] [2024-06-28 00:28:54,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:54,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:28:54,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:54,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:28:54,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:28:54,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:28:54,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 747 transitions, 16060 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) [2024-06-28 00:28:54,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:54,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:28:54,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:56,167 INFO L124 PetriNetUnfolderBase]: 4100/7190 cut-off events. [2024-06-28 00:28:56,167 INFO L125 PetriNetUnfolderBase]: For 660091/660097 co-relation queries the response was YES. [2024-06-28 00:28:56,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62471 conditions, 7190 events. 4100/7190 cut-off events. For 660091/660097 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 55477 event pairs, 639 based on Foata normal form. 4/7140 useless extension candidates. Maximal degree in co-relation 62248. Up to 5657 conditions per place. [2024-06-28 00:28:56,300 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 637 selfloop transitions, 125 changer transitions 0/770 dead transitions. [2024-06-28 00:28:56,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 770 transitions, 17663 flow [2024-06-28 00:28:56,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:28:56,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:28:56,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 00:28:56,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-28 00:28:56,301 INFO L175 Difference]: Start difference. First operand has 575 places, 747 transitions, 16060 flow. Second operand 8 states and 150 transitions. [2024-06-28 00:28:56,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 770 transitions, 17663 flow [2024-06-28 00:29:02,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 770 transitions, 17506 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 00:29:02,316 INFO L231 Difference]: Finished difference. Result has 578 places, 748 transitions, 16174 flow [2024-06-28 00:29:02,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15903, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16174, PETRI_PLACES=578, PETRI_TRANSITIONS=748} [2024-06-28 00:29:02,317 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 535 predicate places. [2024-06-28 00:29:02,317 INFO L495 AbstractCegarLoop]: Abstraction has has 578 places, 748 transitions, 16174 flow [2024-06-28 00:29:02,317 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) [2024-06-28 00:29:02,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:02,317 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, 1] [2024-06-28 00:29:02,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-28 00:29:02,317 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:02,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:02,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1272819121, now seen corresponding path program 2 times [2024-06-28 00:29:02,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:02,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659705517] [2024-06-28 00:29:02,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:02,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:03,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:03,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659705517] [2024-06-28 00:29:03,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659705517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:03,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:03,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 00:29:03,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699512061] [2024-06-28 00:29:03,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:03,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 00:29:03,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:03,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 00:29:03,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 00:29:03,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:29:03,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 578 places, 748 transitions, 16174 flow. Second operand has 11 states, 11 states have (on average 11.727272727272727) internal successors, (129), 11 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:03,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:03,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:29:03,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:06,100 INFO L124 PetriNetUnfolderBase]: 4141/7296 cut-off events. [2024-06-28 00:29:06,100 INFO L125 PetriNetUnfolderBase]: For 709286/709303 co-relation queries the response was YES. [2024-06-28 00:29:06,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63838 conditions, 7296 events. 4141/7296 cut-off events. For 709286/709303 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 56972 event pairs, 868 based on Foata normal form. 22/7276 useless extension candidates. Maximal degree in co-relation 63613. Up to 5001 conditions per place. [2024-06-28 00:29:06,227 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 374 selfloop transitions, 407 changer transitions 0/788 dead transitions. [2024-06-28 00:29:06,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 788 transitions, 18307 flow [2024-06-28 00:29:06,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 00:29:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 00:29:06,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 243 transitions. [2024-06-28 00:29:06,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413265306122449 [2024-06-28 00:29:06,228 INFO L175 Difference]: Start difference. First operand has 578 places, 748 transitions, 16174 flow. Second operand 14 states and 243 transitions. [2024-06-28 00:29:06,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 788 transitions, 18307 flow [2024-06-28 00:29:11,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 585 places, 788 transitions, 18057 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 00:29:11,798 INFO L231 Difference]: Finished difference. Result has 587 places, 752 transitions, 17186 flow [2024-06-28 00:29:11,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15924, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=17186, PETRI_PLACES=587, PETRI_TRANSITIONS=752} [2024-06-28 00:29:11,799 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 544 predicate places. [2024-06-28 00:29:11,799 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 752 transitions, 17186 flow [2024-06-28 00:29:11,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.727272727272727) internal successors, (129), 11 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:11,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:11,799 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, 1] [2024-06-28 00:29:11,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-28 00:29:11,800 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:11,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:11,800 INFO L85 PathProgramCache]: Analyzing trace with hash 870326120, now seen corresponding path program 14 times [2024-06-28 00:29:11,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:11,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061867281] [2024-06-28 00:29:11,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:11,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:12,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:12,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061867281] [2024-06-28 00:29:12,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061867281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:12,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:12,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:29:12,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993308745] [2024-06-28 00:29:12,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:12,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:29:12,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:12,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:29:12,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:29:12,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:29:12,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 752 transitions, 17186 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:12,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:12,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:29:12,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:15,061 INFO L124 PetriNetUnfolderBase]: 4197/7358 cut-off events. [2024-06-28 00:29:15,061 INFO L125 PetriNetUnfolderBase]: For 762723/762729 co-relation queries the response was YES. [2024-06-28 00:29:15,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67739 conditions, 7358 events. 4197/7358 cut-off events. For 762723/762729 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 56947 event pairs, 500 based on Foata normal form. 4/7321 useless extension candidates. Maximal degree in co-relation 67511. Up to 4445 conditions per place. [2024-06-28 00:29:15,197 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 472 selfloop transitions, 316 changer transitions 0/795 dead transitions. [2024-06-28 00:29:15,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 795 transitions, 19550 flow [2024-06-28 00:29:15,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 00:29:15,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 00:29:15,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 227 transitions. [2024-06-28 00:29:15,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157509157509158 [2024-06-28 00:29:15,198 INFO L175 Difference]: Start difference. First operand has 587 places, 752 transitions, 17186 flow. Second operand 13 states and 227 transitions. [2024-06-28 00:29:15,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 795 transitions, 19550 flow [2024-06-28 00:29:22,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 588 places, 795 transitions, 19285 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-06-28 00:29:22,843 INFO L231 Difference]: Finished difference. Result has 591 places, 759 transitions, 17975 flow [2024-06-28 00:29:22,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16931, PETRI_DIFFERENCE_MINUEND_PLACES=576, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=17975, PETRI_PLACES=591, PETRI_TRANSITIONS=759} [2024-06-28 00:29:22,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 548 predicate places. [2024-06-28 00:29:22,844 INFO L495 AbstractCegarLoop]: Abstraction has has 591 places, 759 transitions, 17975 flow [2024-06-28 00:29:22,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:22,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:22,844 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, 1] [2024-06-28 00:29:22,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-28 00:29:22,844 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:22,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:22,845 INFO L85 PathProgramCache]: Analyzing trace with hash 870158720, now seen corresponding path program 15 times [2024-06-28 00:29:22,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:22,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745221080] [2024-06-28 00:29:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:22,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:23,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:23,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745221080] [2024-06-28 00:29:23,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745221080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:23,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:23,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:29:23,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312109840] [2024-06-28 00:29:23,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:23,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:29:23,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:23,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:29:23,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:29:23,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:29:23,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 591 places, 759 transitions, 17975 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:23,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:23,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:29:23,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:26,070 INFO L124 PetriNetUnfolderBase]: 4205/7371 cut-off events. [2024-06-28 00:29:26,070 INFO L125 PetriNetUnfolderBase]: For 764866/764872 co-relation queries the response was YES. [2024-06-28 00:29:26,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69479 conditions, 7371 events. 4205/7371 cut-off events. For 764866/764872 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 57071 event pairs, 672 based on Foata normal form. 2/7315 useless extension candidates. Maximal degree in co-relation 69248. Up to 5796 conditions per place. [2024-06-28 00:29:26,197 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 662 selfloop transitions, 115 changer transitions 0/784 dead transitions. [2024-06-28 00:29:26,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 784 transitions, 19700 flow [2024-06-28 00:29:26,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:29:26,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:29:26,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 00:29:26,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-28 00:29:26,198 INFO L175 Difference]: Start difference. First operand has 591 places, 759 transitions, 17975 flow. Second operand 9 states and 158 transitions. [2024-06-28 00:29:26,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 784 transitions, 19700 flow [2024-06-28 00:29:32,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 784 transitions, 19043 flow, removed 79 selfloop flow, removed 9 redundant places. [2024-06-28 00:29:32,371 INFO L231 Difference]: Finished difference. Result has 591 places, 762 transitions, 17660 flow [2024-06-28 00:29:32,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17320, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17660, PETRI_PLACES=591, PETRI_TRANSITIONS=762} [2024-06-28 00:29:32,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 548 predicate places. [2024-06-28 00:29:32,372 INFO L495 AbstractCegarLoop]: Abstraction has has 591 places, 762 transitions, 17660 flow [2024-06-28 00:29:32,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:32,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:32,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:29:32,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-28 00:29:32,372 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:32,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:32,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1284482554, now seen corresponding path program 16 times [2024-06-28 00:29:32,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:32,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11695791] [2024-06-28 00:29:32,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:32,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:33,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:33,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:33,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11695791] [2024-06-28 00:29:33,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11695791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:33,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:33,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:29:33,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493499555] [2024-06-28 00:29:33,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:33,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:29:33,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:33,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:29:33,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:29:33,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:29:33,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 591 places, 762 transitions, 17660 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:33,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:33,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:29:33,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:35,926 INFO L124 PetriNetUnfolderBase]: 4228/7406 cut-off events. [2024-06-28 00:29:35,927 INFO L125 PetriNetUnfolderBase]: For 802919/802925 co-relation queries the response was YES. [2024-06-28 00:29:36,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69256 conditions, 7406 events. 4228/7406 cut-off events. For 802919/802925 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 57293 event pairs, 504 based on Foata normal form. 4/7367 useless extension candidates. Maximal degree in co-relation 69024. Up to 4779 conditions per place. [2024-06-28 00:29:36,076 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 523 selfloop transitions, 272 changer transitions 0/802 dead transitions. [2024-06-28 00:29:36,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 802 transitions, 19703 flow [2024-06-28 00:29:36,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 00:29:36,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 00:29:36,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 237 transitions. [2024-06-28 00:29:36,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4030612244897959 [2024-06-28 00:29:36,077 INFO L175 Difference]: Start difference. First operand has 591 places, 762 transitions, 17660 flow. Second operand 14 states and 237 transitions. [2024-06-28 00:29:36,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 802 transitions, 19703 flow [2024-06-28 00:29:43,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 802 transitions, 19347 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-28 00:29:43,522 INFO L231 Difference]: Finished difference. Result has 599 places, 765 transitions, 18033 flow [2024-06-28 00:29:43,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17304, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=18033, PETRI_PLACES=599, PETRI_TRANSITIONS=765} [2024-06-28 00:29:43,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 556 predicate places. [2024-06-28 00:29:43,522 INFO L495 AbstractCegarLoop]: Abstraction has has 599 places, 765 transitions, 18033 flow [2024-06-28 00:29:43,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:43,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:43,522 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, 1] [2024-06-28 00:29:43,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-28 00:29:43,523 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:43,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:43,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1284839674, now seen corresponding path program 17 times [2024-06-28 00:29:43,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:43,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180965994] [2024-06-28 00:29:43,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:43,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:44,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:44,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180965994] [2024-06-28 00:29:44,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180965994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:44,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:44,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:29:44,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241130703] [2024-06-28 00:29:44,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:44,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:29:44,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:44,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:29:44,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:29:44,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:29:44,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 765 transitions, 18033 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:44,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:44,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:29:44,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:46,615 INFO L124 PetriNetUnfolderBase]: 4223/7399 cut-off events. [2024-06-28 00:29:46,615 INFO L125 PetriNetUnfolderBase]: For 787970/787976 co-relation queries the response was YES. [2024-06-28 00:29:46,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69617 conditions, 7399 events. 4223/7399 cut-off events. For 787970/787976 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 57458 event pairs, 683 based on Foata normal form. 2/7347 useless extension candidates. Maximal degree in co-relation 69384. Up to 5782 conditions per place. [2024-06-28 00:29:46,765 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 637 selfloop transitions, 144 changer transitions 0/788 dead transitions. [2024-06-28 00:29:46,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 788 transitions, 19877 flow [2024-06-28 00:29:46,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:29:46,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:29:46,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-28 00:29:46,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-28 00:29:46,765 INFO L175 Difference]: Start difference. First operand has 599 places, 765 transitions, 18033 flow. Second operand 10 states and 171 transitions. [2024-06-28 00:29:46,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 608 places, 788 transitions, 19877 flow [2024-06-28 00:29:53,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 788 transitions, 19173 flow, removed 76 selfloop flow, removed 12 redundant places. [2024-06-28 00:29:53,566 INFO L231 Difference]: Finished difference. Result has 597 places, 765 transitions, 17623 flow [2024-06-28 00:29:53,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17329, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17623, PETRI_PLACES=597, PETRI_TRANSITIONS=765} [2024-06-28 00:29:53,566 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 554 predicate places. [2024-06-28 00:29:53,567 INFO L495 AbstractCegarLoop]: Abstraction has has 597 places, 765 transitions, 17623 flow [2024-06-28 00:29:53,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:53,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:53,567 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, 1] [2024-06-28 00:29:53,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-28 00:29:53,567 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:53,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:53,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1284840077, now seen corresponding path program 3 times [2024-06-28 00:29:53,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:53,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782275980] [2024-06-28 00:29:53,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:53,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:53,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:54,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:54,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:54,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782275980] [2024-06-28 00:29:54,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782275980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:54,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:54,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:29:54,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773809142] [2024-06-28 00:29:54,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:54,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:29:54,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:54,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:29:54,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:29:54,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:29:54,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 765 transitions, 17623 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:54,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:54,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:29:54,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:57,200 INFO L124 PetriNetUnfolderBase]: 4231/7441 cut-off events. [2024-06-28 00:29:57,200 INFO L125 PetriNetUnfolderBase]: For 797610/797627 co-relation queries the response was YES. [2024-06-28 00:29:57,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68793 conditions, 7441 events. 4231/7441 cut-off events. For 797610/797627 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 58222 event pairs, 1100 based on Foata normal form. 16/7392 useless extension candidates. Maximal degree in co-relation 68560. Up to 6437 conditions per place. [2024-06-28 00:29:57,342 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 713 selfloop transitions, 66 changer transitions 0/786 dead transitions. [2024-06-28 00:29:57,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 786 transitions, 19327 flow [2024-06-28 00:29:57,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:29:57,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:29:57,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-28 00:29:57,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-28 00:29:57,343 INFO L175 Difference]: Start difference. First operand has 597 places, 765 transitions, 17623 flow. Second operand 9 states and 155 transitions. [2024-06-28 00:29:57,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 786 transitions, 19327 flow [2024-06-28 00:30:03,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 786 transitions, 19092 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 00:30:03,894 INFO L231 Difference]: Finished difference. Result has 600 places, 767 transitions, 17613 flow [2024-06-28 00:30:03,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17388, PETRI_DIFFERENCE_MINUEND_PLACES=591, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17613, PETRI_PLACES=600, PETRI_TRANSITIONS=767} [2024-06-28 00:30:03,895 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 557 predicate places. [2024-06-28 00:30:03,895 INFO L495 AbstractCegarLoop]: Abstraction has has 600 places, 767 transitions, 17613 flow [2024-06-28 00:30:03,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:03,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:03,895 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, 1] [2024-06-28 00:30:03,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-28 00:30:03,895 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:30:03,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:03,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1284839891, now seen corresponding path program 5 times [2024-06-28 00:30:03,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:03,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596703966] [2024-06-28 00:30:03,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:03,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:04,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:04,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596703966] [2024-06-28 00:30:04,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596703966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:04,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:04,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:30:04,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44574242] [2024-06-28 00:30:04,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:04,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:30:04,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:04,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:30:04,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:30:04,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:30:04,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 767 transitions, 17613 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) [2024-06-28 00:30:04,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:04,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:30:04,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:30:07,121 INFO L124 PetriNetUnfolderBase]: 4218/7430 cut-off events. [2024-06-28 00:30:07,121 INFO L125 PetriNetUnfolderBase]: For 794429/794446 co-relation queries the response was YES. [2024-06-28 00:30:07,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67787 conditions, 7430 events. 4218/7430 cut-off events. For 794429/794446 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 58218 event pairs, 875 based on Foata normal form. 20/7411 useless extension candidates. Maximal degree in co-relation 67554. Up to 5264 conditions per place. [2024-06-28 00:30:07,290 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 444 selfloop transitions, 344 changer transitions 0/796 dead transitions. [2024-06-28 00:30:07,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 796 transitions, 19541 flow [2024-06-28 00:30:07,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:30:07,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:30:07,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-28 00:30:07,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-28 00:30:07,291 INFO L175 Difference]: Start difference. First operand has 600 places, 767 transitions, 17613 flow. Second operand 8 states and 165 transitions. [2024-06-28 00:30:07,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 796 transitions, 19541 flow [2024-06-28 00:30:14,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 796 transitions, 19368 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-28 00:30:14,616 INFO L231 Difference]: Finished difference. Result has 601 places, 767 transitions, 18137 flow [2024-06-28 00:30:14,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17442, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18137, PETRI_PLACES=601, PETRI_TRANSITIONS=767} [2024-06-28 00:30:14,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 558 predicate places. [2024-06-28 00:30:14,616 INFO L495 AbstractCegarLoop]: Abstraction has has 601 places, 767 transitions, 18137 flow [2024-06-28 00:30:14,616 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) [2024-06-28 00:30:14,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:14,617 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, 1] [2024-06-28 00:30:14,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-28 00:30:14,617 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:30:14,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:14,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1284846587, now seen corresponding path program 4 times [2024-06-28 00:30:14,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:14,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996076512] [2024-06-28 00:30:14,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:14,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:15,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:15,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996076512] [2024-06-28 00:30:15,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996076512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:15,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:15,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:30:15,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409638835] [2024-06-28 00:30:15,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:15,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:30:15,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:15,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:30:15,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:30:15,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:30:15,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 767 transitions, 18137 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:15,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:15,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:30:15,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:30:18,025 INFO L124 PetriNetUnfolderBase]: 4208/7402 cut-off events. [2024-06-28 00:30:18,025 INFO L125 PetriNetUnfolderBase]: For 770022/770039 co-relation queries the response was YES. [2024-06-28 00:30:18,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68259 conditions, 7402 events. 4208/7402 cut-off events. For 770022/770039 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 57864 event pairs, 1014 based on Foata normal form. 18/7354 useless extension candidates. Maximal degree in co-relation 68026. Up to 6217 conditions per place. [2024-06-28 00:30:18,154 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 638 selfloop transitions, 146 changer transitions 0/791 dead transitions. [2024-06-28 00:30:18,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 791 transitions, 19787 flow [2024-06-28 00:30:18,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:30:18,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:30:18,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-28 00:30:18,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 00:30:18,155 INFO L175 Difference]: Start difference. First operand has 601 places, 767 transitions, 18137 flow. Second operand 10 states and 180 transitions. [2024-06-28 00:30:18,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 791 transitions, 19787 flow [2024-06-28 00:30:26,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 606 places, 791 transitions, 19690 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 00:30:26,431 INFO L231 Difference]: Finished difference. Result has 607 places, 767 transitions, 18360 flow [2024-06-28 00:30:26,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18040, PETRI_DIFFERENCE_MINUEND_PLACES=597, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18360, PETRI_PLACES=607, PETRI_TRANSITIONS=767} [2024-06-28 00:30:26,432 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 564 predicate places. [2024-06-28 00:30:26,432 INFO L495 AbstractCegarLoop]: Abstraction has has 607 places, 767 transitions, 18360 flow [2024-06-28 00:30:26,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:26,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:26,432 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, 1] [2024-06-28 00:30:26,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-28 00:30:26,432 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:30:26,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:26,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1284834094, now seen corresponding path program 18 times [2024-06-28 00:30:26,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:26,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905102318] [2024-06-28 00:30:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:26,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:26,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:27,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:27,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905102318] [2024-06-28 00:30:27,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905102318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:27,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:27,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:30:27,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421563644] [2024-06-28 00:30:27,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:27,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:30:27,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:27,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:30:27,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:30:27,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:30:27,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 607 places, 767 transitions, 18360 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:27,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:27,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:30:27,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:30:29,595 INFO L124 PetriNetUnfolderBase]: 4203/7377 cut-off events. [2024-06-28 00:30:29,595 INFO L125 PetriNetUnfolderBase]: For 755671/755677 co-relation queries the response was YES. [2024-06-28 00:30:29,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68404 conditions, 7377 events. 4203/7377 cut-off events. For 755671/755677 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 57331 event pairs, 664 based on Foata normal form. 2/7327 useless extension candidates. Maximal degree in co-relation 68168. Up to 5798 conditions per place. [2024-06-28 00:30:29,746 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 653 selfloop transitions, 129 changer transitions 0/789 dead transitions. [2024-06-28 00:30:29,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 789 transitions, 19992 flow [2024-06-28 00:30:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:30:29,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:30:29,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-28 00:30:29,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-28 00:30:29,747 INFO L175 Difference]: Start difference. First operand has 607 places, 767 transitions, 18360 flow. Second operand 10 states and 168 transitions. [2024-06-28 00:30:29,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 789 transitions, 19992 flow [2024-06-28 00:30:37,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 789 transitions, 19606 flow, removed 29 selfloop flow, removed 12 redundant places. [2024-06-28 00:30:37,793 INFO L231 Difference]: Finished difference. Result has 605 places, 767 transitions, 18237 flow [2024-06-28 00:30:37,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17974, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18237, PETRI_PLACES=605, PETRI_TRANSITIONS=767} [2024-06-28 00:30:37,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 562 predicate places. [2024-06-28 00:30:37,793 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 767 transitions, 18237 flow [2024-06-28 00:30:37,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:37,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:37,794 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, 1] [2024-06-28 00:30:37,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-28 00:30:37,794 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:30:37,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:37,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1138764817, now seen corresponding path program 6 times [2024-06-28 00:30:37,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:37,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019933201] [2024-06-28 00:30:37,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:37,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:38,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:38,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019933201] [2024-06-28 00:30:38,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019933201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:38,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:38,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:30:38,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022478869] [2024-06-28 00:30:38,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:38,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:30:38,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:38,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:30:38,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:30:38,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:30:38,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 767 transitions, 18237 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:38,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:38,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:30:38,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:30:41,670 INFO L124 PetriNetUnfolderBase]: 4268/7514 cut-off events. [2024-06-28 00:30:41,670 INFO L125 PetriNetUnfolderBase]: For 778711/778751 co-relation queries the response was YES. [2024-06-28 00:30:41,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69884 conditions, 7514 events. 4268/7514 cut-off events. For 778711/778751 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 58985 event pairs, 1011 based on Foata normal form. 30/7477 useless extension candidates. Maximal degree in co-relation 69650. Up to 6233 conditions per place. [2024-06-28 00:30:41,806 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 667 selfloop transitions, 129 changer transitions 0/803 dead transitions. [2024-06-28 00:30:41,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 803 transitions, 20468 flow [2024-06-28 00:30:41,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:30:41,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:30:41,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-28 00:30:41,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-28 00:30:41,808 INFO L175 Difference]: Start difference. First operand has 605 places, 767 transitions, 18237 flow. Second operand 10 states and 176 transitions. [2024-06-28 00:30:41,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 803 transitions, 20468 flow [2024-06-28 00:30:48,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 803 transitions, 20128 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-28 00:30:48,936 INFO L231 Difference]: Finished difference. Result has 607 places, 782 transitions, 18618 flow [2024-06-28 00:30:48,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17897, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18618, PETRI_PLACES=607, PETRI_TRANSITIONS=782} [2024-06-28 00:30:48,937 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 564 predicate places. [2024-06-28 00:30:48,937 INFO L495 AbstractCegarLoop]: Abstraction has has 607 places, 782 transitions, 18618 flow [2024-06-28 00:30:48,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:48,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:48,937 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, 1] [2024-06-28 00:30:48,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-28 00:30:48,937 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:30:48,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:48,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1450121533, now seen corresponding path program 14 times [2024-06-28 00:30:48,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:48,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958467938] [2024-06-28 00:30:48,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:48,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:49,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:49,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958467938] [2024-06-28 00:30:49,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958467938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:49,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:49,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:30:49,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362290625] [2024-06-28 00:30:49,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:49,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:30:49,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:49,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:30:49,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:30:49,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:30:49,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 607 places, 782 transitions, 18618 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:49,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:49,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:30:49,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:30:52,378 INFO L124 PetriNetUnfolderBase]: 4260/7486 cut-off events. [2024-06-28 00:30:52,379 INFO L125 PetriNetUnfolderBase]: For 781696/781730 co-relation queries the response was YES. [2024-06-28 00:30:52,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69669 conditions, 7486 events. 4260/7486 cut-off events. For 781696/781730 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 58438 event pairs, 780 based on Foata normal form. 16/7450 useless extension candidates. Maximal degree in co-relation 69432. Up to 5777 conditions per place. [2024-06-28 00:30:52,533 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 627 selfloop transitions, 166 changer transitions 0/800 dead transitions. [2024-06-28 00:30:52,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 800 transitions, 20248 flow [2024-06-28 00:30:52,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:30:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:30:52,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-28 00:30:52,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-28 00:30:52,534 INFO L175 Difference]: Start difference. First operand has 607 places, 782 transitions, 18618 flow. Second operand 10 states and 164 transitions. [2024-06-28 00:30:52,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 800 transitions, 20248 flow [2024-06-28 00:30:58,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 611 places, 800 transitions, 20001 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-28 00:30:58,823 INFO L231 Difference]: Finished difference. Result has 612 places, 782 transitions, 18707 flow [2024-06-28 00:30:58,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18371, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18707, PETRI_PLACES=612, PETRI_TRANSITIONS=782} [2024-06-28 00:30:58,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 569 predicate places. [2024-06-28 00:30:58,824 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 782 transitions, 18707 flow [2024-06-28 00:30:58,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:58,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:58,825 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, 1] [2024-06-28 00:30:58,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-28 00:30:58,825 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:30:58,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:58,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1254235694, now seen corresponding path program 19 times [2024-06-28 00:30:58,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:58,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017644636] [2024-06-28 00:30:58,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:58,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:59,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:59,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017644636] [2024-06-28 00:30:59,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017644636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:59,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:59,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:30:59,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500094526] [2024-06-28 00:30:59,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:59,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:30:59,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:59,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:30:59,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:30:59,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:30:59,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 782 transitions, 18707 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:59,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:59,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:30:59,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:02,383 INFO L124 PetriNetUnfolderBase]: 4291/7529 cut-off events. [2024-06-28 00:31:02,383 INFO L125 PetriNetUnfolderBase]: For 761237/761243 co-relation queries the response was YES. [2024-06-28 00:31:02,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69789 conditions, 7529 events. 4291/7529 cut-off events. For 761237/761243 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 58679 event pairs, 644 based on Foata normal form. 2/7458 useless extension candidates. Maximal degree in co-relation 69550. Up to 6125 conditions per place. [2024-06-28 00:31:02,552 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 715 selfloop transitions, 90 changer transitions 0/812 dead transitions. [2024-06-28 00:31:02,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 623 places, 812 transitions, 20498 flow [2024-06-28 00:31:02,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:31:02,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:31:02,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 196 transitions. [2024-06-28 00:31:02,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-28 00:31:02,553 INFO L175 Difference]: Start difference. First operand has 612 places, 782 transitions, 18707 flow. Second operand 12 states and 196 transitions. [2024-06-28 00:31:02,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 623 places, 812 transitions, 20498 flow [2024-06-28 00:31:09,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 812 transitions, 20182 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-28 00:31:09,643 INFO L231 Difference]: Finished difference. Result has 618 places, 786 transitions, 18733 flow [2024-06-28 00:31:09,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18391, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=692, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=18733, PETRI_PLACES=618, PETRI_TRANSITIONS=786} [2024-06-28 00:31:09,643 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 575 predicate places. [2024-06-28 00:31:09,643 INFO L495 AbstractCegarLoop]: Abstraction has has 618 places, 786 transitions, 18733 flow [2024-06-28 00:31:09,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:09,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:09,643 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, 1] [2024-06-28 00:31:09,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-28 00:31:09,644 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:31:09,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:09,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1254235849, now seen corresponding path program 15 times [2024-06-28 00:31:09,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:09,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200577014] [2024-06-28 00:31:09,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:09,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:10,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:10,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200577014] [2024-06-28 00:31:10,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200577014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:10,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:10,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:31:10,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070505657] [2024-06-28 00:31:10,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:10,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:31:10,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:10,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:31:10,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:31:10,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:31:10,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 786 transitions, 18733 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) [2024-06-28 00:31:10,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:10,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:31:10,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:13,111 INFO L124 PetriNetUnfolderBase]: 4283/7521 cut-off events. [2024-06-28 00:31:13,111 INFO L125 PetriNetUnfolderBase]: For 759086/759092 co-relation queries the response was YES. [2024-06-28 00:31:13,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69207 conditions, 7521 events. 4283/7521 cut-off events. For 759086/759092 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 58691 event pairs, 758 based on Foata normal form. 4/7449 useless extension candidates. Maximal degree in co-relation 68966. Up to 6372 conditions per place. [2024-06-28 00:31:13,255 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 737 selfloop transitions, 59 changer transitions 0/804 dead transitions. [2024-06-28 00:31:13,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 804 transitions, 20377 flow [2024-06-28 00:31:13,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:31:13,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:31:13,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 00:31:13,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 00:31:13,256 INFO L175 Difference]: Start difference. First operand has 618 places, 786 transitions, 18733 flow. Second operand 8 states and 144 transitions. [2024-06-28 00:31:13,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 804 transitions, 20377 flow [2024-06-28 00:31:22,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 804 transitions, 19885 flow, removed 67 selfloop flow, removed 11 redundant places. [2024-06-28 00:31:22,485 INFO L231 Difference]: Finished difference. Result has 615 places, 786 transitions, 18363 flow [2024-06-28 00:31:22,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18241, PETRI_DIFFERENCE_MINUEND_PLACES=607, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18363, PETRI_PLACES=615, PETRI_TRANSITIONS=786} [2024-06-28 00:31:22,486 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 572 predicate places. [2024-06-28 00:31:22,486 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 786 transitions, 18363 flow [2024-06-28 00:31:22,486 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) [2024-06-28 00:31:22,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:22,486 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, 1] [2024-06-28 00:31:22,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-28 00:31:22,486 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:31:22,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:22,486 INFO L85 PathProgramCache]: Analyzing trace with hash -62559893, now seen corresponding path program 5 times [2024-06-28 00:31:22,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:22,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867496401] [2024-06-28 00:31:22,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:22,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:23,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:23,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867496401] [2024-06-28 00:31:23,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867496401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:23,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:23,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:31:23,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856536357] [2024-06-28 00:31:23,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:23,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:31:23,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:23,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:31:23,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:31:23,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:31:23,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 786 transitions, 18363 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:23,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:23,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:31:23,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:26,091 INFO L124 PetriNetUnfolderBase]: 4311/7617 cut-off events. [2024-06-28 00:31:26,091 INFO L125 PetriNetUnfolderBase]: For 796227/796267 co-relation queries the response was YES. [2024-06-28 00:31:26,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69125 conditions, 7617 events. 4311/7617 cut-off events. For 796227/796267 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 60134 event pairs, 1129 based on Foata normal form. 36/7585 useless extension candidates. Maximal degree in co-relation 68888. Up to 6463 conditions per place. [2024-06-28 00:31:26,249 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 702 selfloop transitions, 98 changer transitions 0/807 dead transitions. [2024-06-28 00:31:26,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 623 places, 807 transitions, 20173 flow [2024-06-28 00:31:26,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:31:26,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:31:26,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 00:31:26,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-28 00:31:26,250 INFO L175 Difference]: Start difference. First operand has 615 places, 786 transitions, 18363 flow. Second operand 9 states and 160 transitions. [2024-06-28 00:31:26,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 623 places, 807 transitions, 20173 flow [2024-06-28 00:31:33,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 807 transitions, 19848 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 00:31:33,690 INFO L231 Difference]: Finished difference. Result has 616 places, 789 transitions, 18360 flow [2024-06-28 00:31:33,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18038, PETRI_DIFFERENCE_MINUEND_PLACES=607, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=688, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18360, PETRI_PLACES=616, PETRI_TRANSITIONS=789} [2024-06-28 00:31:33,690 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 573 predicate places. [2024-06-28 00:31:33,690 INFO L495 AbstractCegarLoop]: Abstraction has has 616 places, 789 transitions, 18360 flow [2024-06-28 00:31:33,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:33,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:33,691 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, 1] [2024-06-28 00:31:33,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-28 00:31:33,691 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:31:33,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:33,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1138587001, now seen corresponding path program 6 times [2024-06-28 00:31:33,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:33,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643982984] [2024-06-28 00:31:33,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:33,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:34,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:34,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643982984] [2024-06-28 00:31:34,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643982984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:34,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:34,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:31:34,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662117233] [2024-06-28 00:31:34,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:34,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:31:34,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:34,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:31:34,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:31:34,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:31:34,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 616 places, 789 transitions, 18360 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:34,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:34,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:31:34,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:37,458 INFO L124 PetriNetUnfolderBase]: 4319/7635 cut-off events. [2024-06-28 00:31:37,458 INFO L125 PetriNetUnfolderBase]: For 761901/761941 co-relation queries the response was YES. [2024-06-28 00:31:37,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69077 conditions, 7635 events. 4319/7635 cut-off events. For 761901/761941 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 60447 event pairs, 1119 based on Foata normal form. 30/7593 useless extension candidates. Maximal degree in co-relation 68838. Up to 6539 conditions per place. [2024-06-28 00:31:37,614 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 712 selfloop transitions, 86 changer transitions 0/805 dead transitions. [2024-06-28 00:31:37,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 623 places, 805 transitions, 20082 flow [2024-06-28 00:31:37,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:31:37,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:31:37,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 00:31:37,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 00:31:37,615 INFO L175 Difference]: Start difference. First operand has 616 places, 789 transitions, 18360 flow. Second operand 8 states and 145 transitions. [2024-06-28 00:31:37,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 623 places, 805 transitions, 20082 flow [2024-06-28 00:31:46,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 616 places, 805 transitions, 19853 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-28 00:31:46,014 INFO L231 Difference]: Finished difference. Result has 617 places, 791 transitions, 18399 flow [2024-06-28 00:31:46,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18131, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=703, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18399, PETRI_PLACES=617, PETRI_TRANSITIONS=791} [2024-06-28 00:31:46,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 574 predicate places. [2024-06-28 00:31:46,014 INFO L495 AbstractCegarLoop]: Abstraction has has 617 places, 791 transitions, 18399 flow [2024-06-28 00:31:46,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:46,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:46,015 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, 1] [2024-06-28 00:31:46,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-28 00:31:46,015 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:31:46,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:46,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1138944524, now seen corresponding path program 20 times [2024-06-28 00:31:46,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:46,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705684594] [2024-06-28 00:31:46,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:46,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:46,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:46,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705684594] [2024-06-28 00:31:46,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705684594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:46,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:46,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:31:46,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185020564] [2024-06-28 00:31:46,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:46,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:31:46,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:46,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:31:46,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:31:46,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:31:46,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 791 transitions, 18399 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:46,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:46,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:31:46,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:49,555 INFO L124 PetriNetUnfolderBase]: 4348/7628 cut-off events. [2024-06-28 00:31:49,556 INFO L125 PetriNetUnfolderBase]: For 789228/789262 co-relation queries the response was YES. [2024-06-28 00:31:49,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69868 conditions, 7628 events. 4348/7628 cut-off events. For 789228/789262 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 59643 event pairs, 782 based on Foata normal form. 14/7571 useless extension candidates. Maximal degree in co-relation 69628. Up to 5707 conditions per place. [2024-06-28 00:31:49,707 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 658 selfloop transitions, 154 changer transitions 0/819 dead transitions. [2024-06-28 00:31:49,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 819 transitions, 20545 flow [2024-06-28 00:31:49,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:31:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:31:49,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-28 00:31:49,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-28 00:31:49,708 INFO L175 Difference]: Start difference. First operand has 617 places, 791 transitions, 18399 flow. Second operand 10 states and 169 transitions. [2024-06-28 00:31:49,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 819 transitions, 20545 flow [2024-06-28 00:31:58,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 620 places, 819 transitions, 20337 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-28 00:31:58,141 INFO L231 Difference]: Finished difference. Result has 625 places, 800 transitions, 18909 flow [2024-06-28 00:31:58,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18191, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18909, PETRI_PLACES=625, PETRI_TRANSITIONS=800} [2024-06-28 00:31:58,142 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 582 predicate places. [2024-06-28 00:31:58,142 INFO L495 AbstractCegarLoop]: Abstraction has has 625 places, 800 transitions, 18909 flow [2024-06-28 00:31:58,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:58,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:58,142 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, 1] [2024-06-28 00:31:58,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-28 00:31:58,143 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:31:58,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:58,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1456729338, now seen corresponding path program 21 times [2024-06-28 00:31:58,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:58,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537794463] [2024-06-28 00:31:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:58,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:58,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:58,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537794463] [2024-06-28 00:31:58,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537794463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:58,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:58,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:31:58,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991498367] [2024-06-28 00:31:58,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:58,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:31:58,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:58,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:31:58,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:31:58,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:31:58,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 625 places, 800 transitions, 18909 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:58,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:58,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:31:58,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:01,290 INFO L124 PetriNetUnfolderBase]: 4356/7652 cut-off events. [2024-06-28 00:32:01,291 INFO L125 PetriNetUnfolderBase]: For 803941/803975 co-relation queries the response was YES. [2024-06-28 00:32:01,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70917 conditions, 7652 events. 4356/7652 cut-off events. For 803941/803975 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 59928 event pairs, 798 based on Foata normal form. 14/7609 useless extension candidates. Maximal degree in co-relation 70672. Up to 5750 conditions per place. [2024-06-28 00:32:01,469 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 629 selfloop transitions, 187 changer transitions 0/823 dead transitions. [2024-06-28 00:32:01,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 823 transitions, 20730 flow [2024-06-28 00:32:01,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:32:01,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:32:01,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-28 00:32:01,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-28 00:32:01,471 INFO L175 Difference]: Start difference. First operand has 625 places, 800 transitions, 18909 flow. Second operand 9 states and 157 transitions. [2024-06-28 00:32:01,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 633 places, 823 transitions, 20730 flow [2024-06-28 00:32:09,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 823 transitions, 20543 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-28 00:32:09,272 INFO L231 Difference]: Finished difference. Result has 632 places, 806 transitions, 19365 flow [2024-06-28 00:32:09,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18754, PETRI_DIFFERENCE_MINUEND_PLACES=622, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19365, PETRI_PLACES=632, PETRI_TRANSITIONS=806} [2024-06-28 00:32:09,272 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 589 predicate places. [2024-06-28 00:32:09,272 INFO L495 AbstractCegarLoop]: Abstraction has has 632 places, 806 transitions, 19365 flow [2024-06-28 00:32:09,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:09,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:09,273 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, 1] [2024-06-28 00:32:09,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-28 00:32:09,273 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:32:09,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:09,274 INFO L85 PathProgramCache]: Analyzing trace with hash -62560296, now seen corresponding path program 22 times [2024-06-28 00:32:09,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:09,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549031598] [2024-06-28 00:32:09,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:09,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:10,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:10,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549031598] [2024-06-28 00:32:10,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549031598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:10,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:10,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:32:10,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588520080] [2024-06-28 00:32:10,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:10,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:32:10,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:10,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:32:10,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:32:10,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:32:10,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 806 transitions, 19365 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:10,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:10,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:32:10,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:12,625 INFO L124 PetriNetUnfolderBase]: 4372/7684 cut-off events. [2024-06-28 00:32:12,625 INFO L125 PetriNetUnfolderBase]: For 815486/815520 co-relation queries the response was YES. [2024-06-28 00:32:12,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72050 conditions, 7684 events. 4372/7684 cut-off events. For 815486/815520 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 60301 event pairs, 800 based on Foata normal form. 14/7635 useless extension candidates. Maximal degree in co-relation 71802. Up to 5746 conditions per place. [2024-06-28 00:32:12,790 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 622 selfloop transitions, 198 changer transitions 0/827 dead transitions. [2024-06-28 00:32:12,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 640 places, 827 transitions, 21164 flow [2024-06-28 00:32:12,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:32:12,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:32:12,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 00:32:12,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 00:32:12,790 INFO L175 Difference]: Start difference. First operand has 632 places, 806 transitions, 19365 flow. Second operand 9 states and 159 transitions. [2024-06-28 00:32:12,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 640 places, 827 transitions, 21164 flow [2024-06-28 00:32:22,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 637 places, 827 transitions, 20968 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-28 00:32:22,304 INFO L231 Difference]: Finished difference. Result has 639 places, 810 transitions, 19712 flow [2024-06-28 00:32:22,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=19169, PETRI_DIFFERENCE_MINUEND_PLACES=629, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19712, PETRI_PLACES=639, PETRI_TRANSITIONS=810} [2024-06-28 00:32:22,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 596 predicate places. [2024-06-28 00:32:22,305 INFO L495 AbstractCegarLoop]: Abstraction has has 639 places, 810 transitions, 19712 flow [2024-06-28 00:32:22,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:22,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:22,305 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, 1] [2024-06-28 00:32:22,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-28 00:32:22,305 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:32:22,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:22,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1138592984, now seen corresponding path program 23 times [2024-06-28 00:32:22,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:22,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506110327] [2024-06-28 00:32:22,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:22,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:22,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:22,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506110327] [2024-06-28 00:32:22,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506110327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:22,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:22,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:32:22,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029633917] [2024-06-28 00:32:22,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:22,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:32:22,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:22,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:32:22,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:32:22,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:32:22,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 639 places, 810 transitions, 19712 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:22,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:22,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:32:22,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:25,977 INFO L124 PetriNetUnfolderBase]: 4380/7672 cut-off events. [2024-06-28 00:32:25,978 INFO L125 PetriNetUnfolderBase]: For 832107/832141 co-relation queries the response was YES. [2024-06-28 00:32:26,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72764 conditions, 7672 events. 4380/7672 cut-off events. For 832107/832141 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 60135 event pairs, 782 based on Foata normal form. 14/7615 useless extension candidates. Maximal degree in co-relation 72514. Up to 5786 conditions per place. [2024-06-28 00:32:26,127 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 659 selfloop transitions, 164 changer transitions 0/830 dead transitions. [2024-06-28 00:32:26,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 648 places, 830 transitions, 21486 flow [2024-06-28 00:32:26,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:32:26,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:32:26,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-28 00:32:26,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-28 00:32:26,128 INFO L175 Difference]: Start difference. First operand has 639 places, 810 transitions, 19712 flow. Second operand 10 states and 168 transitions. [2024-06-28 00:32:26,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 648 places, 830 transitions, 21486 flow [2024-06-28 00:32:34,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 642 places, 830 transitions, 21036 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 00:32:34,199 INFO L231 Difference]: Finished difference. Result has 643 places, 813 transitions, 19685 flow [2024-06-28 00:32:34,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=19264, PETRI_DIFFERENCE_MINUEND_PLACES=633, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19685, PETRI_PLACES=643, PETRI_TRANSITIONS=813} [2024-06-28 00:32:34,200 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 600 predicate places. [2024-06-28 00:32:34,200 INFO L495 AbstractCegarLoop]: Abstraction has has 643 places, 813 transitions, 19685 flow [2024-06-28 00:32:34,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:34,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:34,200 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, 1] [2024-06-28 00:32:34,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-28 00:32:34,200 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:32:34,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:34,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1138760384, now seen corresponding path program 24 times [2024-06-28 00:32:34,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:34,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084015947] [2024-06-28 00:32:34,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:34,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:35,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:35,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084015947] [2024-06-28 00:32:35,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084015947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:35,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:35,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:32:35,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052575441] [2024-06-28 00:32:35,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:35,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:32:35,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:35,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:32:35,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:32:35,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:32:35,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 643 places, 813 transitions, 19685 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:35,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:35,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:32:35,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:38,376 INFO L124 PetriNetUnfolderBase]: 4467/7841 cut-off events. [2024-06-28 00:32:38,376 INFO L125 PetriNetUnfolderBase]: For 949881/949915 co-relation queries the response was YES. [2024-06-28 00:32:38,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76193 conditions, 7841 events. 4467/7841 cut-off events. For 949881/949915 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 61579 event pairs, 620 based on Foata normal form. 14/7796 useless extension candidates. Maximal degree in co-relation 75942. Up to 4737 conditions per place. [2024-06-28 00:32:38,617 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 513 selfloop transitions, 333 changer transitions 0/853 dead transitions. [2024-06-28 00:32:38,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 654 places, 853 transitions, 22461 flow [2024-06-28 00:32:38,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:32:38,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:32:38,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 207 transitions. [2024-06-28 00:32:38,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-28 00:32:38,618 INFO L175 Difference]: Start difference. First operand has 643 places, 813 transitions, 19685 flow. Second operand 12 states and 207 transitions. [2024-06-28 00:32:38,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 654 places, 853 transitions, 22461 flow [2024-06-28 00:32:49,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 649 places, 853 transitions, 22174 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 00:32:49,203 INFO L231 Difference]: Finished difference. Result has 651 places, 825 transitions, 20713 flow [2024-06-28 00:32:49,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=19398, PETRI_DIFFERENCE_MINUEND_PLACES=638, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=813, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=324, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=20713, PETRI_PLACES=651, PETRI_TRANSITIONS=825} [2024-06-28 00:32:49,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 608 predicate places. [2024-06-28 00:32:49,204 INFO L495 AbstractCegarLoop]: Abstraction has has 651 places, 825 transitions, 20713 flow [2024-06-28 00:32:49,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:49,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:49,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:32:49,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-28 00:32:49,204 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:32:49,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:49,204 INFO L85 PathProgramCache]: Analyzing trace with hash -290461229, now seen corresponding path program 7 times [2024-06-28 00:32:49,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:49,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427869617] [2024-06-28 00:32:49,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:49,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:50,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:50,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427869617] [2024-06-28 00:32:50,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427869617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:50,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:50,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:32:50,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890699539] [2024-06-28 00:32:50,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:50,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:32:50,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:50,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:32:50,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:32:50,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:32:50,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 651 places, 825 transitions, 20713 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) [2024-06-28 00:32:50,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:50,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:32:50,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:53,386 INFO L124 PetriNetUnfolderBase]: 4500/7942 cut-off events. [2024-06-28 00:32:53,387 INFO L125 PetriNetUnfolderBase]: For 1014147/1014187 co-relation queries the response was YES. [2024-06-28 00:32:53,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78466 conditions, 7942 events. 4500/7942 cut-off events. For 1014147/1014187 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 63184 event pairs, 1168 based on Foata normal form. 34/7897 useless extension candidates. Maximal degree in co-relation 78214. Up to 6715 conditions per place. [2024-06-28 00:32:53,542 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 710 selfloop transitions, 130 changer transitions 0/848 dead transitions. [2024-06-28 00:32:53,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 658 places, 848 transitions, 22856 flow [2024-06-28 00:32:53,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:32:53,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:32:53,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 00:32:53,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-28 00:32:53,543 INFO L175 Difference]: Start difference. First operand has 651 places, 825 transitions, 20713 flow. Second operand 8 states and 159 transitions. [2024-06-28 00:32:53,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 658 places, 848 transitions, 22856 flow [2024-06-28 00:33:04,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 651 places, 848 transitions, 22328 flow, removed 89 selfloop flow, removed 7 redundant places. [2024-06-28 00:33:04,745 INFO L231 Difference]: Finished difference. Result has 653 places, 829 transitions, 20694 flow [2024-06-28 00:33:04,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=20199, PETRI_DIFFERENCE_MINUEND_PLACES=644, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=825, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=695, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=20694, PETRI_PLACES=653, PETRI_TRANSITIONS=829} [2024-06-28 00:33:04,746 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 610 predicate places. [2024-06-28 00:33:04,746 INFO L495 AbstractCegarLoop]: Abstraction has has 653 places, 829 transitions, 20694 flow [2024-06-28 00:33:04,746 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) [2024-06-28 00:33:04,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:04,746 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, 1] [2024-06-28 00:33:04,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-28 00:33:04,746 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:33:04,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:04,746 INFO L85 PathProgramCache]: Analyzing trace with hash -290645586, now seen corresponding path program 25 times [2024-06-28 00:33:04,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:04,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692207402] [2024-06-28 00:33:04,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:04,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:05,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:05,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692207402] [2024-06-28 00:33:05,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692207402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:05,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:05,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:33:05,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261168602] [2024-06-28 00:33:05,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:05,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:33:05,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:05,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:33:05,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:33:05,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:33:05,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 653 places, 829 transitions, 20694 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:05,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:05,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:33:05,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:09,011 INFO L124 PetriNetUnfolderBase]: 4495/7889 cut-off events. [2024-06-28 00:33:09,011 INFO L125 PetriNetUnfolderBase]: For 977709/977743 co-relation queries the response was YES. [2024-06-28 00:33:09,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77761 conditions, 7889 events. 4495/7889 cut-off events. For 977709/977743 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 62020 event pairs, 633 based on Foata normal form. 14/7845 useless extension candidates. Maximal degree in co-relation 77506. Up to 4777 conditions per place. [2024-06-28 00:33:09,283 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 511 selfloop transitions, 340 changer transitions 0/858 dead transitions. [2024-06-28 00:33:09,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 663 places, 858 transitions, 22984 flow [2024-06-28 00:33:09,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:33:09,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:33:09,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-28 00:33:09,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264069264069264 [2024-06-28 00:33:09,297 INFO L175 Difference]: Start difference. First operand has 653 places, 829 transitions, 20694 flow. Second operand 11 states and 197 transitions. [2024-06-28 00:33:09,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 663 places, 858 transitions, 22984 flow [2024-06-28 00:33:20,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 660 places, 858 transitions, 22771 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-28 00:33:20,977 INFO L231 Difference]: Finished difference. Result has 662 places, 830 transitions, 21355 flow [2024-06-28 00:33:20,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=20481, PETRI_DIFFERENCE_MINUEND_PLACES=650, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=829, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21355, PETRI_PLACES=662, PETRI_TRANSITIONS=830} [2024-06-28 00:33:20,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 619 predicate places. [2024-06-28 00:33:20,978 INFO L495 AbstractCegarLoop]: Abstraction has has 662 places, 830 transitions, 21355 flow [2024-06-28 00:33:20,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:20,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:20,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:33:20,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-28 00:33:20,978 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:33:20,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:20,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1138938944, now seen corresponding path program 26 times [2024-06-28 00:33:20,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:20,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639128692] [2024-06-28 00:33:20,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:20,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:21,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:21,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:21,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639128692] [2024-06-28 00:33:21,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639128692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:21,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:21,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:33:21,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547825245] [2024-06-28 00:33:21,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:21,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:33:21,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:21,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:33:21,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:33:21,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:33:21,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 662 places, 830 transitions, 21355 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:21,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:21,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:33:21,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:24,680 INFO L124 PetriNetUnfolderBase]: 4490/7866 cut-off events. [2024-06-28 00:33:24,680 INFO L125 PetriNetUnfolderBase]: For 982801/982835 co-relation queries the response was YES. [2024-06-28 00:33:24,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78750 conditions, 7866 events. 4490/7866 cut-off events. For 982801/982835 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 61830 event pairs, 826 based on Foata normal form. 14/7808 useless extension candidates. Maximal degree in co-relation 78492. Up to 5956 conditions per place. [2024-06-28 00:33:24,957 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 684 selfloop transitions, 156 changer transitions 0/847 dead transitions. [2024-06-28 00:33:24,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 670 places, 847 transitions, 23077 flow [2024-06-28 00:33:24,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:33:24,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:33:24,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-28 00:33:24,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-28 00:33:24,958 INFO L175 Difference]: Start difference. First operand has 662 places, 830 transitions, 21355 flow. Second operand 9 states and 157 transitions. [2024-06-28 00:33:24,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 670 places, 847 transitions, 23077 flow [2024-06-28 00:33:37,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 663 places, 847 transitions, 22383 flow, removed 93 selfloop flow, removed 7 redundant places. [2024-06-28 00:33:37,526 INFO L231 Difference]: Finished difference. Result has 664 places, 830 transitions, 20978 flow [2024-06-28 00:33:37,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=20661, PETRI_DIFFERENCE_MINUEND_PLACES=655, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20978, PETRI_PLACES=664, PETRI_TRANSITIONS=830} [2024-06-28 00:33:37,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 621 predicate places. [2024-06-28 00:33:37,527 INFO L495 AbstractCegarLoop]: Abstraction has has 664 places, 830 transitions, 20978 flow [2024-06-28 00:33:37,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:37,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:37,527 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, 1] [2024-06-28 00:33:37,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-28 00:33:37,527 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:33:37,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:37,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1138760167, now seen corresponding path program 8 times [2024-06-28 00:33:37,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:37,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920949917] [2024-06-28 00:33:37,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:37,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:38,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:38,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920949917] [2024-06-28 00:33:38,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920949917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:38,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:38,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:33:38,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274979972] [2024-06-28 00:33:38,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:38,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:33:38,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:38,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:33:38,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:33:38,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:33:38,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 830 transitions, 20978 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:38,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:38,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:33:38,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:41,519 INFO L124 PetriNetUnfolderBase]: 4485/7911 cut-off events. [2024-06-28 00:33:41,519 INFO L125 PetriNetUnfolderBase]: For 972073/972113 co-relation queries the response was YES. [2024-06-28 00:33:41,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77579 conditions, 7911 events. 4485/7911 cut-off events. For 972073/972113 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 62888 event pairs, 1042 based on Foata normal form. 30/7852 useless extension candidates. Maximal degree in co-relation 77320. Up to 6679 conditions per place. [2024-06-28 00:33:41,690 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 723 selfloop transitions, 119 changer transitions 0/849 dead transitions. [2024-06-28 00:33:41,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 672 places, 849 transitions, 22729 flow [2024-06-28 00:33:41,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:33:41,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:33:41,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 00:33:41,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-28 00:33:41,691 INFO L175 Difference]: Start difference. First operand has 664 places, 830 transitions, 20978 flow. Second operand 9 states and 163 transitions. [2024-06-28 00:33:41,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 672 places, 849 transitions, 22729 flow [2024-06-28 00:33:53,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 666 places, 849 transitions, 22398 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-28 00:33:53,900 INFO L231 Difference]: Finished difference. Result has 667 places, 831 transitions, 20907 flow [2024-06-28 00:33:53,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=20647, PETRI_DIFFERENCE_MINUEND_PLACES=658, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=711, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20907, PETRI_PLACES=667, PETRI_TRANSITIONS=831} [2024-06-28 00:33:53,900 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 624 predicate places. [2024-06-28 00:33:53,900 INFO L495 AbstractCegarLoop]: Abstraction has has 667 places, 831 transitions, 20907 flow [2024-06-28 00:33:53,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:53,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:53,900 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, 1] [2024-06-28 00:33:53,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-28 00:33:53,901 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:33:53,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:53,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1138759981, now seen corresponding path program 7 times [2024-06-28 00:33:53,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:53,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245565800] [2024-06-28 00:33:53,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:53,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:55,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:55,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245565800] [2024-06-28 00:33:55,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245565800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:55,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:55,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:33:55,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456371380] [2024-06-28 00:33:55,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:55,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:33:55,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:55,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:33:55,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:33:55,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:33:55,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 667 places, 831 transitions, 20907 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:55,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:55,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:33:55,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:58,237 INFO L124 PetriNetUnfolderBase]: 4493/7917 cut-off events. [2024-06-28 00:33:58,238 INFO L125 PetriNetUnfolderBase]: For 984094/984134 co-relation queries the response was YES. [2024-06-28 00:33:58,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77568 conditions, 7917 events. 4493/7917 cut-off events. For 984094/984134 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 62797 event pairs, 1163 based on Foata normal form. 30/7856 useless extension candidates. Maximal degree in co-relation 77308. Up to 6761 conditions per place. [2024-06-28 00:33:58,396 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 738 selfloop transitions, 105 changer transitions 0/850 dead transitions. [2024-06-28 00:33:58,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 674 places, 850 transitions, 22802 flow [2024-06-28 00:33:58,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:33:58,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:33:58,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 00:33:58,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-28 00:33:58,397 INFO L175 Difference]: Start difference. First operand has 667 places, 831 transitions, 20907 flow. Second operand 8 states and 147 transitions. [2024-06-28 00:33:58,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 674 places, 850 transitions, 22802 flow [2024-06-28 00:34:09,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 850 transitions, 22531 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-28 00:34:09,703 INFO L231 Difference]: Finished difference. Result has 668 places, 835 transitions, 21025 flow [2024-06-28 00:34:09,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=20636, PETRI_DIFFERENCE_MINUEND_PLACES=660, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=21025, PETRI_PLACES=668, PETRI_TRANSITIONS=835} [2024-06-28 00:34:09,703 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 625 predicate places. [2024-06-28 00:34:09,703 INFO L495 AbstractCegarLoop]: Abstraction has has 668 places, 835 transitions, 21025 flow [2024-06-28 00:34:09,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:09,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:09,704 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, 1] [2024-06-28 00:34:09,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-28 00:34:09,704 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:09,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:09,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1036149394, now seen corresponding path program 27 times [2024-06-28 00:34:09,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:09,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515444594] [2024-06-28 00:34:09,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:09,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:10,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:10,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515444594] [2024-06-28 00:34:10,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515444594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:10,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:10,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:34:10,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113674495] [2024-06-28 00:34:10,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:10,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:34:10,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:10,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:34:10,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:34:10,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:34:10,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 668 places, 835 transitions, 21025 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:10,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:10,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:34:10,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:13,391 INFO L124 PetriNetUnfolderBase]: 4496/7884 cut-off events. [2024-06-28 00:34:13,391 INFO L125 PetriNetUnfolderBase]: For 983697/983731 co-relation queries the response was YES. [2024-06-28 00:34:13,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77367 conditions, 7884 events. 4496/7884 cut-off events. For 983697/983731 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 62069 event pairs, 816 based on Foata normal form. 14/7827 useless extension candidates. Maximal degree in co-relation 77106. Up to 5930 conditions per place. [2024-06-28 00:34:13,549 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 670 selfloop transitions, 177 changer transitions 0/854 dead transitions. [2024-06-28 00:34:13,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 677 places, 854 transitions, 22809 flow [2024-06-28 00:34:13,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:34:13,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:34:13,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-28 00:34:13,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 00:34:13,550 INFO L175 Difference]: Start difference. First operand has 668 places, 835 transitions, 21025 flow. Second operand 10 states and 170 transitions. [2024-06-28 00:34:13,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 677 places, 854 transitions, 22809 flow Killed by 15