./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe035_power.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe035_power.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/safe035_power.i ./goblint.2024-06-19_11-23-25.files/protection/safe035_power.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:57:55,327 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:57:55,390 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:57:55,394 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:57:55,395 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:57:55,417 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:57:55,417 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:57:55,418 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:57:55,418 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:57:55,421 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:57:55,422 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:57:55,422 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:57:55,423 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:57:55,424 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:57:55,424 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:57:55,424 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:57:55,424 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:57:55,425 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:57:55,425 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:57:55,425 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:57:55,425 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:57:55,426 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:57:55,426 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:57:55,426 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:57:55,426 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:57:55,427 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:57:55,427 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:57:55,427 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:57:55,428 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:57:55,428 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:57:55,429 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:57:55,429 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:57:55,429 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:57:55,429 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:57:55,430 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:57:55,430 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:57:55,430 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:57:55,430 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:57:55,430 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:57:55,431 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:57:55,431 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:57:55,431 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:57:55,431 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:57:55,431 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:57:55,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:57:55,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:57:55,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:57:55,658 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:57:55,659 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:57:55,660 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe035_power.i [2024-06-27 17:57:56,703 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:57:56,948 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:57:56,952 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe035_power.i [2024-06-27 17:57:56,968 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21082ca4a/a80a0e80a3344cc594439c52748fad15/FLAG632de47bd [2024-06-27 17:57:56,979 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21082ca4a/a80a0e80a3344cc594439c52748fad15 [2024-06-27 17:57:56,981 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:57:56,982 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:57:56,982 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe035_power.yml/witness.yml [2024-06-27 17:57:57,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:57:57,167 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:57:57,168 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:57:57,168 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:57:57,172 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:57:57,172 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:57:56" (1/2) ... [2024-06-27 17:57:57,173 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46850a03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:57:57, skipping insertion in model container [2024-06-27 17:57:57,173 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:57:56" (1/2) ... [2024-06-27 17:57:57,175 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@618ba4e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:57:57, skipping insertion in model container [2024-06-27 17:57:57,175 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:57:57" (2/2) ... [2024-06-27 17:57:57,176 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46850a03 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:57:57, skipping insertion in model container [2024-06-27 17:57:57,176 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:57:57" (2/2) ... [2024-06-27 17:57:57,177 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:57:57,253 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:57:57,255 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-06-27 17:57:57,255 INFO L97 edCorrectnessWitness]: Location invariant before [L873-L873] (((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-06-27 17:57:57,255 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] (((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-06-27 17:57:57,255 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:57:57,255 INFO L106 edCorrectnessWitness]: ghost_update [L869-L869] multithreaded = 1; [2024-06-27 17:57:57,293 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:57:57,452 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe035_power.i[947,960] [2024-06-27 17:57:57,644 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:57:57,651 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:57:57,683 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe035_power.i[947,960] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:57:57,745 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:57:57,774 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:57:57,775 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:57:57 WrapperNode [2024-06-27 17:57:57,775 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:57:57,776 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:57:57,776 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:57:57,776 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:57:57,781 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:57:57" (1/1) ... [2024-06-27 17:57:57,810 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:57:57" (1/1) ... [2024-06-27 17:57:57,841 INFO L138 Inliner]: procedures = 175, calls = 48, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 171 [2024-06-27 17:57:57,842 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:57:57,843 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:57:57,843 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:57:57,843 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:57:57,851 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:57:57" (1/1) ... [2024-06-27 17:57:57,851 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:57:57" (1/1) ... [2024-06-27 17:57:57,873 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:57:57" (1/1) ... [2024-06-27 17:57:57,887 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 17:57:57,898 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:57:57" (1/1) ... [2024-06-27 17:57:57,898 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:57:57" (1/1) ... [2024-06-27 17:57:57,905 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:57:57" (1/1) ... [2024-06-27 17:57:57,910 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:57:57" (1/1) ... [2024-06-27 17:57:57,918 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:57:57" (1/1) ... [2024-06-27 17:57:57,919 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:57:57" (1/1) ... [2024-06-27 17:57:57,922 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:57:57,928 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:57:57,929 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:57:57,929 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:57:57,930 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:57:57" (1/1) ... [2024-06-27 17:57:57,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:57:57,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:57:57,971 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 17:57:58,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 17:57:58,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:57:58,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:57:58,028 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 17:57:58,028 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 17:57:58,028 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 17:57:58,028 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 17:57:58,029 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 17:57:58,029 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 17:57:58,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:57:58,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:57:58,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:57:58,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:57:58,031 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:57:58,156 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:57:58,158 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:57:58,493 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:57:58,493 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:57:58,752 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:57:58,753 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 17:57:58,753 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:57:58 BoogieIcfgContainer [2024-06-27 17:57:58,753 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:57:58,755 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:57:58,755 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:57:58,757 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:57:58,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:57:56" (1/4) ... [2024-06-27 17:57:58,758 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35035fdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:57:58, skipping insertion in model container [2024-06-27 17:57:58,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:57:57" (2/4) ... [2024-06-27 17:57:58,759 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35035fdd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:57:58, skipping insertion in model container [2024-06-27 17:57:58,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:57:57" (3/4) ... [2024-06-27 17:57:58,759 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35035fdd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:57:58, skipping insertion in model container [2024-06-27 17:57:58,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:57:58" (4/4) ... [2024-06-27 17:57:58,760 INFO L112 eAbstractionObserver]: Analyzing ICFG safe035_power.i [2024-06-27 17:57:58,773 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:57:58,773 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 17:57:58,773 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:57:58,817 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:57:58,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 49 transitions, 110 flow [2024-06-27 17:57:58,873 INFO L124 PetriNetUnfolderBase]: 1/46 cut-off events. [2024-06-27 17:57:58,873 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:57:58,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 46 events. 1/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 82 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-06-27 17:57:58,876 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 49 transitions, 110 flow [2024-06-27 17:57:58,880 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 46 transitions, 101 flow [2024-06-27 17:57:58,891 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:57:58,896 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;@3ca27fe1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:57:58,896 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-27 17:57:58,901 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:57:58,901 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 17:57:58,901 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:57:58,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:58,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:57:58,902 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:57:58,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:58,908 INFO L85 PathProgramCache]: Analyzing trace with hash 437841702, now seen corresponding path program 1 times [2024-06-27 17:57:58,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:58,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398837763] [2024-06-27 17:57:58,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:58,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:59,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:59,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398837763] [2024-06-27 17:57:59,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398837763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:59,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:59,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:57:59,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717605135] [2024-06-27 17:57:59,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:59,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:57:59,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:59,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:57:59,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:57:59,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 17:57:59,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 101 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) [2024-06-27 17:57:59,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:59,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 17:57:59,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:00,969 INFO L124 PetriNetUnfolderBase]: 6858/10759 cut-off events. [2024-06-27 17:58:00,969 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-06-27 17:58:00,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20598 conditions, 10759 events. 6858/10759 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 70066 event pairs, 5845 based on Foata normal form. 337/10373 useless extension candidates. Maximal degree in co-relation 20586. Up to 9723 conditions per place. [2024-06-27 17:58:01,010 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 46 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-06-27 17:58:01,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 61 transitions, 239 flow [2024-06-27 17:58:01,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:58:01,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:58:01,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-06-27 17:58:01,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6462585034013606 [2024-06-27 17:58:01,020 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 101 flow. Second operand 3 states and 95 transitions. [2024-06-27 17:58:01,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 61 transitions, 239 flow [2024-06-27 17:58:01,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 234 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:58:01,024 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 133 flow [2024-06-27 17:58:01,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-27 17:58:01,028 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2024-06-27 17:58:01,028 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 133 flow [2024-06-27 17:58:01,028 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) [2024-06-27 17:58:01,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:01,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:01,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:58:01,029 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:01,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:01,030 INFO L85 PathProgramCache]: Analyzing trace with hash -140875835, now seen corresponding path program 1 times [2024-06-27 17:58:01,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:01,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832145980] [2024-06-27 17:58:01,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:01,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:01,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:01,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832145980] [2024-06-27 17:58:01,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832145980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:01,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:01,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:58:01,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688447290] [2024-06-27 17:58:01,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:01,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:58:01,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:01,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:58:01,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:58:01,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-06-27 17:58:01,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:01,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:01,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-06-27 17:58:01,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:02,512 INFO L124 PetriNetUnfolderBase]: 6837/10730 cut-off events. [2024-06-27 17:58:02,512 INFO L125 PetriNetUnfolderBase]: For 1391/1391 co-relation queries the response was YES. [2024-06-27 17:58:02,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22489 conditions, 10730 events. 6837/10730 cut-off events. For 1391/1391 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 69725 event pairs, 4476 based on Foata normal form. 9/10067 useless extension candidates. Maximal degree in co-relation 22477. Up to 9639 conditions per place. [2024-06-27 17:58:02,551 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 58 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2024-06-27 17:58:02,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 79 transitions, 357 flow [2024-06-27 17:58:02,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:58:02,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:58:02,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-27 17:58:02,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-27 17:58:02,553 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 133 flow. Second operand 4 states and 120 transitions. [2024-06-27 17:58:02,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 79 transitions, 357 flow [2024-06-27 17:58:02,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 79 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:58:02,555 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 220 flow [2024-06-27 17:58:02,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=220, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2024-06-27 17:58:02,555 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 4 predicate places. [2024-06-27 17:58:02,556 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 220 flow [2024-06-27 17:58:02,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:02,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:02,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:02,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:58:02,556 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:02,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:02,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1457552539, now seen corresponding path program 1 times [2024-06-27 17:58:02,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:02,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183740858] [2024-06-27 17:58:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:02,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:02,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:02,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:02,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183740858] [2024-06-27 17:58:02,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183740858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:02,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:02,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:02,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356338576] [2024-06-27 17:58:02,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:02,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:02,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:02,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:02,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:02,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:58:02,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 220 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:02,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:02,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:58:02,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:04,645 INFO L124 PetriNetUnfolderBase]: 9045/13956 cut-off events. [2024-06-27 17:58:04,645 INFO L125 PetriNetUnfolderBase]: For 4695/4695 co-relation queries the response was YES. [2024-06-27 17:58:04,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32057 conditions, 13956 events. 9045/13956 cut-off events. For 4695/4695 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 89562 event pairs, 5940 based on Foata normal form. 8/13138 useless extension candidates. Maximal degree in co-relation 32041. Up to 12677 conditions per place. [2024-06-27 17:58:04,720 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 67 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-06-27 17:58:04,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 88 transitions, 458 flow [2024-06-27 17:58:04,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:58:04,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:58:04,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-27 17:58:04,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5061224489795918 [2024-06-27 17:58:04,722 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 220 flow. Second operand 5 states and 124 transitions. [2024-06-27 17:58:04,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 88 transitions, 458 flow [2024-06-27 17:58:04,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 88 transitions, 452 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 17:58:04,726 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 278 flow [2024-06-27 17:58:04,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-27 17:58:04,728 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-27 17:58:04,728 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 278 flow [2024-06-27 17:58:04,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:04,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:04,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:04,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:58:04,729 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:04,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:04,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1401122051, now seen corresponding path program 1 times [2024-06-27 17:58:04,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:04,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082528650] [2024-06-27 17:58:04,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:04,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:05,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:05,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082528650] [2024-06-27 17:58:05,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082528650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:05,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:05,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:05,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917566502] [2024-06-27 17:58:05,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:05,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:05,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:05,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:05,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:05,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-06-27 17:58:05,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 278 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) [2024-06-27 17:58:05,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:05,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-06-27 17:58:05,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:07,204 INFO L124 PetriNetUnfolderBase]: 7949/12438 cut-off events. [2024-06-27 17:58:07,204 INFO L125 PetriNetUnfolderBase]: For 7315/7315 co-relation queries the response was YES. [2024-06-27 17:58:07,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30572 conditions, 12438 events. 7949/12438 cut-off events. For 7315/7315 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 81347 event pairs, 3315 based on Foata normal form. 6/11688 useless extension candidates. Maximal degree in co-relation 30553. Up to 11132 conditions per place. [2024-06-27 17:58:07,257 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 78 selfloop transitions, 17 changer transitions 0/104 dead transitions. [2024-06-27 17:58:07,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 104 transitions, 577 flow [2024-06-27 17:58:07,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:07,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:07,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-27 17:58:07,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-27 17:58:07,259 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 278 flow. Second operand 6 states and 165 transitions. [2024-06-27 17:58:07,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 104 transitions, 577 flow [2024-06-27 17:58:07,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 104 transitions, 547 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 17:58:07,263 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 329 flow [2024-06-27 17:58:07,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=329, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2024-06-27 17:58:07,264 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2024-06-27 17:58:07,264 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 329 flow [2024-06-27 17:58:07,264 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) [2024-06-27 17:58:07,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:07,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:07,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:58:07,265 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:07,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:07,265 INFO L85 PathProgramCache]: Analyzing trace with hash 920226986, now seen corresponding path program 1 times [2024-06-27 17:58:07,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:07,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166039838] [2024-06-27 17:58:07,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:07,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:07,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:07,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166039838] [2024-06-27 17:58:07,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166039838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:07,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:07,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:07,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615920030] [2024-06-27 17:58:07,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:07,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:07,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:07,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:07,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:07,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:58:07,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 329 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:07,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:07,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:58:07,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:09,354 INFO L124 PetriNetUnfolderBase]: 9053/13960 cut-off events. [2024-06-27 17:58:09,355 INFO L125 PetriNetUnfolderBase]: For 12681/12681 co-relation queries the response was YES. [2024-06-27 17:58:09,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36789 conditions, 13960 events. 9053/13960 cut-off events. For 12681/12681 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 89374 event pairs, 4125 based on Foata normal form. 8/13149 useless extension candidates. Maximal degree in co-relation 36768. Up to 12528 conditions per place. [2024-06-27 17:58:09,413 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 86 selfloop transitions, 24 changer transitions 0/117 dead transitions. [2024-06-27 17:58:09,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 117 transitions, 727 flow [2024-06-27 17:58:09,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:09,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:09,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 17:58:09,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-06-27 17:58:09,415 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 329 flow. Second operand 6 states and 150 transitions. [2024-06-27 17:58:09,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 117 transitions, 727 flow [2024-06-27 17:58:09,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 117 transitions, 682 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 17:58:09,425 INFO L231 Difference]: Finished difference. Result has 71 places, 83 transitions, 451 flow [2024-06-27 17:58:09,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=451, PETRI_PLACES=71, PETRI_TRANSITIONS=83} [2024-06-27 17:58:09,427 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 16 predicate places. [2024-06-27 17:58:09,430 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 83 transitions, 451 flow [2024-06-27 17:58:09,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:09,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:09,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:09,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:58:09,432 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:09,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:09,432 INFO L85 PathProgramCache]: Analyzing trace with hash -318897212, now seen corresponding path program 2 times [2024-06-27 17:58:09,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:09,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532216009] [2024-06-27 17:58:09,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:09,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:09,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:09,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:09,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:09,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532216009] [2024-06-27 17:58:09,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532216009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:09,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:09,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:09,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942621925] [2024-06-27 17:58:09,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:09,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:09,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:09,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:09,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:10,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:58:10,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 83 transitions, 451 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:10,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:10,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:58:10,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:11,641 INFO L124 PetriNetUnfolderBase]: 9029/13930 cut-off events. [2024-06-27 17:58:11,641 INFO L125 PetriNetUnfolderBase]: For 17875/17877 co-relation queries the response was YES. [2024-06-27 17:58:11,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39364 conditions, 13930 events. 9029/13930 cut-off events. For 17875/17877 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 89437 event pairs, 4127 based on Foata normal form. 10/13124 useless extension candidates. Maximal degree in co-relation 39340. Up to 12512 conditions per place. [2024-06-27 17:58:11,703 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 81 selfloop transitions, 24 changer transitions 0/112 dead transitions. [2024-06-27 17:58:11,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 112 transitions, 727 flow [2024-06-27 17:58:11,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:11,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:11,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 17:58:11,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-27 17:58:11,705 INFO L175 Difference]: Start difference. First operand has 71 places, 83 transitions, 451 flow. Second operand 6 states and 144 transitions. [2024-06-27 17:58:11,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 112 transitions, 727 flow [2024-06-27 17:58:11,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 112 transitions, 685 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-06-27 17:58:11,724 INFO L231 Difference]: Finished difference. Result has 76 places, 83 transitions, 467 flow [2024-06-27 17:58:11,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=467, PETRI_PLACES=76, PETRI_TRANSITIONS=83} [2024-06-27 17:58:11,724 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-27 17:58:11,725 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 83 transitions, 467 flow [2024-06-27 17:58:11,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:11,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:11,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:11,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:58:11,725 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:11,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:11,726 INFO L85 PathProgramCache]: Analyzing trace with hash -539715773, now seen corresponding path program 1 times [2024-06-27 17:58:11,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:11,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096971911] [2024-06-27 17:58:11,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:11,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:11,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:11,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096971911] [2024-06-27 17:58:11,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096971911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:11,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:11,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:58:11,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537929999] [2024-06-27 17:58:11,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:11,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:58:11,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:11,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:58:11,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:58:11,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-06-27 17:58:11,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 83 transitions, 467 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:11,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:11,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-06-27 17:58:11,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:12,444 INFO L124 PetriNetUnfolderBase]: 4089/7250 cut-off events. [2024-06-27 17:58:12,444 INFO L125 PetriNetUnfolderBase]: For 6907/7084 co-relation queries the response was YES. [2024-06-27 17:58:12,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17478 conditions, 7250 events. 4089/7250 cut-off events. For 6907/7084 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 53092 event pairs, 1487 based on Foata normal form. 17/6852 useless extension candidates. Maximal degree in co-relation 17452. Up to 5134 conditions per place. [2024-06-27 17:58:12,489 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 47 selfloop transitions, 11 changer transitions 0/89 dead transitions. [2024-06-27 17:58:12,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 89 transitions, 564 flow [2024-06-27 17:58:12,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:58:12,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:58:12,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-06-27 17:58:12,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7006802721088435 [2024-06-27 17:58:12,491 INFO L175 Difference]: Start difference. First operand has 76 places, 83 transitions, 467 flow. Second operand 3 states and 103 transitions. [2024-06-27 17:58:12,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 89 transitions, 564 flow [2024-06-27 17:58:12,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 89 transitions, 522 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:12,497 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 394 flow [2024-06-27 17:58:12,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=394, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-27 17:58:12,497 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-06-27 17:58:12,497 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 394 flow [2024-06-27 17:58:12,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:12,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:12,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:12,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:58:12,498 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:12,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:12,499 INFO L85 PathProgramCache]: Analyzing trace with hash -640197090, now seen corresponding path program 1 times [2024-06-27 17:58:12,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:12,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126945863] [2024-06-27 17:58:12,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:12,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:13,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:13,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126945863] [2024-06-27 17:58:13,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126945863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:13,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:13,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:13,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631005667] [2024-06-27 17:58:13,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:13,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:13,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:13,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:13,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:13,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2024-06-27 17:58:13,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 394 flow. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:13,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:13,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2024-06-27 17:58:13,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:14,342 INFO L124 PetriNetUnfolderBase]: 7582/11922 cut-off events. [2024-06-27 17:58:14,342 INFO L125 PetriNetUnfolderBase]: For 18763/18763 co-relation queries the response was YES. [2024-06-27 17:58:14,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32326 conditions, 11922 events. 7582/11922 cut-off events. For 18763/18763 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 76096 event pairs, 4666 based on Foata normal form. 1/11578 useless extension candidates. Maximal degree in co-relation 32300. Up to 10758 conditions per place. [2024-06-27 17:58:14,393 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 76 selfloop transitions, 10 changer transitions 0/97 dead transitions. [2024-06-27 17:58:14,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 97 transitions, 656 flow [2024-06-27 17:58:14,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:58:14,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:58:14,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-06-27 17:58:14,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-27 17:58:14,395 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 394 flow. Second operand 5 states and 112 transitions. [2024-06-27 17:58:14,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 97 transitions, 656 flow [2024-06-27 17:58:14,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 97 transitions, 632 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 17:58:14,408 INFO L231 Difference]: Finished difference. Result has 77 places, 84 transitions, 478 flow [2024-06-27 17:58:14,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=478, PETRI_PLACES=77, PETRI_TRANSITIONS=84} [2024-06-27 17:58:14,408 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 22 predicate places. [2024-06-27 17:58:14,408 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 84 transitions, 478 flow [2024-06-27 17:58:14,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:14,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:14,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:14,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:58:14,409 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:14,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:14,409 INFO L85 PathProgramCache]: Analyzing trace with hash -429736895, now seen corresponding path program 1 times [2024-06-27 17:58:14,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:14,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268282400] [2024-06-27 17:58:14,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:14,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:15,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:15,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268282400] [2024-06-27 17:58:15,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268282400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:15,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:15,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:58:15,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241846857] [2024-06-27 17:58:15,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:15,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:58:15,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:15,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:58:15,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:58:15,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:58:15,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 478 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:15,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:15,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:58:15,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:16,771 INFO L124 PetriNetUnfolderBase]: 8045/12418 cut-off events. [2024-06-27 17:58:16,771 INFO L125 PetriNetUnfolderBase]: For 23807/23807 co-relation queries the response was YES. [2024-06-27 17:58:16,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35848 conditions, 12418 events. 8045/12418 cut-off events. For 23807/23807 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 77619 event pairs, 3370 based on Foata normal form. 8/12081 useless extension candidates. Maximal degree in co-relation 35819. Up to 11213 conditions per place. [2024-06-27 17:58:16,964 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 99 selfloop transitions, 21 changer transitions 1/128 dead transitions. [2024-06-27 17:58:16,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 128 transitions, 850 flow [2024-06-27 17:58:16,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:16,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:16,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 17:58:16,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48104956268221577 [2024-06-27 17:58:16,967 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 478 flow. Second operand 7 states and 165 transitions. [2024-06-27 17:58:16,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 128 transitions, 850 flow [2024-06-27 17:58:16,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 128 transitions, 824 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-27 17:58:16,978 INFO L231 Difference]: Finished difference. Result has 82 places, 87 transitions, 539 flow [2024-06-27 17:58:16,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=539, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2024-06-27 17:58:16,979 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 27 predicate places. [2024-06-27 17:58:16,979 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 539 flow [2024-06-27 17:58:16,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:16,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:16,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:16,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:58:16,982 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:16,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:16,982 INFO L85 PathProgramCache]: Analyzing trace with hash -913219839, now seen corresponding path program 2 times [2024-06-27 17:58:16,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:16,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025569099] [2024-06-27 17:58:16,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:16,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:17,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:17,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025569099] [2024-06-27 17:58:17,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025569099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:17,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:17,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:58:17,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370049071] [2024-06-27 17:58:17,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:17,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:58:17,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:17,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:58:17,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:58:17,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:58:17,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 539 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:17,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:17,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:58:17,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:19,209 INFO L124 PetriNetUnfolderBase]: 7247/11312 cut-off events. [2024-06-27 17:58:19,210 INFO L125 PetriNetUnfolderBase]: For 28880/28880 co-relation queries the response was YES. [2024-06-27 17:58:19,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34975 conditions, 11312 events. 7247/11312 cut-off events. For 28880/28880 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 70941 event pairs, 2515 based on Foata normal form. 8/10974 useless extension candidates. Maximal degree in co-relation 34944. Up to 9754 conditions per place. [2024-06-27 17:58:19,268 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 96 selfloop transitions, 37 changer transitions 0/140 dead transitions. [2024-06-27 17:58:19,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 140 transitions, 1021 flow [2024-06-27 17:58:19,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:19,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:19,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 17:58:19,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014577259475219 [2024-06-27 17:58:19,270 INFO L175 Difference]: Start difference. First operand has 82 places, 87 transitions, 539 flow. Second operand 7 states and 172 transitions. [2024-06-27 17:58:19,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 140 transitions, 1021 flow [2024-06-27 17:58:19,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 140 transitions, 952 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:19,287 INFO L231 Difference]: Finished difference. Result has 82 places, 95 transitions, 637 flow [2024-06-27 17:58:19,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=637, PETRI_PLACES=82, PETRI_TRANSITIONS=95} [2024-06-27 17:58:19,288 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 27 predicate places. [2024-06-27 17:58:19,288 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 95 transitions, 637 flow [2024-06-27 17:58:19,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:19,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:19,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:19,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:58:19,289 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:19,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:19,289 INFO L85 PathProgramCache]: Analyzing trace with hash -425083671, now seen corresponding path program 1 times [2024-06-27 17:58:19,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:19,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504978051] [2024-06-27 17:58:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:19,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:20,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:20,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504978051] [2024-06-27 17:58:20,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504978051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:20,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:20,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:58:20,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338805451] [2024-06-27 17:58:20,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:20,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:58:20,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:20,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:58:20,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:58:20,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:58:20,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 95 transitions, 637 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:20,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:20,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:58:20,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:22,143 INFO L124 PetriNetUnfolderBase]: 7371/11431 cut-off events. [2024-06-27 17:58:22,143 INFO L125 PetriNetUnfolderBase]: For 37736/37736 co-relation queries the response was YES. [2024-06-27 17:58:22,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37486 conditions, 11431 events. 7371/11431 cut-off events. For 37736/37736 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 71079 event pairs, 2784 based on Foata normal form. 8/11110 useless extension candidates. Maximal degree in co-relation 37455. Up to 9888 conditions per place. [2024-06-27 17:58:22,226 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 121 selfloop transitions, 31 changer transitions 0/159 dead transitions. [2024-06-27 17:58:22,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 159 transitions, 1237 flow [2024-06-27 17:58:22,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:22,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:22,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 17:58:22,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131195335276968 [2024-06-27 17:58:22,228 INFO L175 Difference]: Start difference. First operand has 82 places, 95 transitions, 637 flow. Second operand 7 states and 176 transitions. [2024-06-27 17:58:22,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 159 transitions, 1237 flow [2024-06-27 17:58:22,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 159 transitions, 1177 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 17:58:22,263 INFO L231 Difference]: Finished difference. Result has 88 places, 105 transitions, 772 flow [2024-06-27 17:58:22,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=772, PETRI_PLACES=88, PETRI_TRANSITIONS=105} [2024-06-27 17:58:22,263 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 33 predicate places. [2024-06-27 17:58:22,263 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 105 transitions, 772 flow [2024-06-27 17:58:22,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:22,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:22,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:22,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:58:22,264 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:22,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:22,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1722188407, now seen corresponding path program 3 times [2024-06-27 17:58:22,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:22,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231165046] [2024-06-27 17:58:22,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:22,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:23,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:23,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231165046] [2024-06-27 17:58:23,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231165046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:23,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:23,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:58:23,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827914705] [2024-06-27 17:58:23,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:23,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:58:23,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:23,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:58:23,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:58:23,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:58:23,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 105 transitions, 772 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:23,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:23,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:58:23,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:24,679 INFO L124 PetriNetUnfolderBase]: 7351/11486 cut-off events. [2024-06-27 17:58:24,679 INFO L125 PetriNetUnfolderBase]: For 44546/44552 co-relation queries the response was YES. [2024-06-27 17:58:24,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39581 conditions, 11486 events. 7351/11486 cut-off events. For 44546/44552 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 72293 event pairs, 2333 based on Foata normal form. 14/11145 useless extension candidates. Maximal degree in co-relation 39546. Up to 9914 conditions per place. [2024-06-27 17:58:24,752 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 101 selfloop transitions, 37 changer transitions 0/145 dead transitions. [2024-06-27 17:58:24,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 145 transitions, 1146 flow [2024-06-27 17:58:24,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:24,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:24,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 17:58:24,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4868804664723032 [2024-06-27 17:58:24,754 INFO L175 Difference]: Start difference. First operand has 88 places, 105 transitions, 772 flow. Second operand 7 states and 167 transitions. [2024-06-27 17:58:24,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 145 transitions, 1146 flow [2024-06-27 17:58:24,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 145 transitions, 1094 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 17:58:24,808 INFO L231 Difference]: Finished difference. Result has 93 places, 105 transitions, 803 flow [2024-06-27 17:58:24,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=803, PETRI_PLACES=93, PETRI_TRANSITIONS=105} [2024-06-27 17:58:24,809 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 38 predicate places. [2024-06-27 17:58:24,809 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 105 transitions, 803 flow [2024-06-27 17:58:24,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:24,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:24,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:24,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:58:24,810 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:24,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:24,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1062573235, now seen corresponding path program 2 times [2024-06-27 17:58:24,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:24,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934979183] [2024-06-27 17:58:24,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:24,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:25,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:25,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:25,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934979183] [2024-06-27 17:58:25,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934979183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:25,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:25,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:25,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889619033] [2024-06-27 17:58:25,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:25,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:25,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:25,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:25,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:25,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:58:25,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 105 transitions, 803 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:25,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:25,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:58:25,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:27,131 INFO L124 PetriNetUnfolderBase]: 7455/11626 cut-off events. [2024-06-27 17:58:27,132 INFO L125 PetriNetUnfolderBase]: For 48798/48800 co-relation queries the response was YES. [2024-06-27 17:58:27,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40789 conditions, 11626 events. 7455/11626 cut-off events. For 48798/48800 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 73011 event pairs, 2767 based on Foata normal form. 10/11281 useless extension candidates. Maximal degree in co-relation 40752. Up to 9928 conditions per place. [2024-06-27 17:58:27,200 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 118 selfloop transitions, 36 changer transitions 0/161 dead transitions. [2024-06-27 17:58:27,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 161 transitions, 1378 flow [2024-06-27 17:58:27,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:27,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:27,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 17:58:27,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043731778425656 [2024-06-27 17:58:27,201 INFO L175 Difference]: Start difference. First operand has 93 places, 105 transitions, 803 flow. Second operand 7 states and 173 transitions. [2024-06-27 17:58:27,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 161 transitions, 1378 flow [2024-06-27 17:58:27,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 161 transitions, 1267 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 17:58:27,238 INFO L231 Difference]: Finished difference. Result has 94 places, 111 transitions, 853 flow [2024-06-27 17:58:27,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=853, PETRI_PLACES=94, PETRI_TRANSITIONS=111} [2024-06-27 17:58:27,238 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 39 predicate places. [2024-06-27 17:58:27,239 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 111 transitions, 853 flow [2024-06-27 17:58:27,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:27,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:27,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:27,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:58:27,239 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:27,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:27,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1070913475, now seen corresponding path program 3 times [2024-06-27 17:58:27,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:27,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819002261] [2024-06-27 17:58:27,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:27,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:28,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:28,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819002261] [2024-06-27 17:58:28,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819002261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:28,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:28,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:58:28,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853766348] [2024-06-27 17:58:28,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:28,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:58:28,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:28,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:58:28,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:58:28,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:58:28,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 111 transitions, 853 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:28,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:28,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:58:28,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:29,611 INFO L124 PetriNetUnfolderBase]: 7455/11633 cut-off events. [2024-06-27 17:58:29,612 INFO L125 PetriNetUnfolderBase]: For 54644/54644 co-relation queries the response was YES. [2024-06-27 17:58:29,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41605 conditions, 11633 events. 7455/11633 cut-off events. For 54644/54644 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 72739 event pairs, 3724 based on Foata normal form. 8/11284 useless extension candidates. Maximal degree in co-relation 41567. Up to 10382 conditions per place. [2024-06-27 17:58:29,699 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 126 selfloop transitions, 24 changer transitions 0/157 dead transitions. [2024-06-27 17:58:29,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 157 transitions, 1343 flow [2024-06-27 17:58:29,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:29,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:29,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-27 17:58:29,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47230320699708456 [2024-06-27 17:58:29,701 INFO L175 Difference]: Start difference. First operand has 94 places, 111 transitions, 853 flow. Second operand 7 states and 162 transitions. [2024-06-27 17:58:29,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 157 transitions, 1343 flow [2024-06-27 17:58:29,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 157 transitions, 1252 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 17:58:29,753 INFO L231 Difference]: Finished difference. Result has 99 places, 118 transitions, 924 flow [2024-06-27 17:58:29,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=924, PETRI_PLACES=99, PETRI_TRANSITIONS=118} [2024-06-27 17:58:29,754 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2024-06-27 17:58:29,754 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 118 transitions, 924 flow [2024-06-27 17:58:29,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:29,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:29,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:29,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:58:29,755 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:29,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:29,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1070924387, now seen corresponding path program 1 times [2024-06-27 17:58:29,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:29,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772628198] [2024-06-27 17:58:29,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:29,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:30,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:30,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:30,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772628198] [2024-06-27 17:58:30,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772628198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:30,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:30,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:58:30,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759147638] [2024-06-27 17:58:30,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:30,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:58:30,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:30,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:58:30,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:58:30,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:58:30,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 118 transitions, 924 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:30,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:30,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:58:30,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:32,438 INFO L124 PetriNetUnfolderBase]: 7447/11627 cut-off events. [2024-06-27 17:58:32,439 INFO L125 PetriNetUnfolderBase]: For 60956/60956 co-relation queries the response was YES. [2024-06-27 17:58:32,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42175 conditions, 11627 events. 7447/11627 cut-off events. For 60956/60956 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 73092 event pairs, 3669 based on Foata normal form. 4/11272 useless extension candidates. Maximal degree in co-relation 42134. Up to 10424 conditions per place. [2024-06-27 17:58:32,534 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 130 selfloop transitions, 22 changer transitions 0/159 dead transitions. [2024-06-27 17:58:32,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 159 transitions, 1372 flow [2024-06-27 17:58:32,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:32,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:32,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 17:58:32,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46647230320699706 [2024-06-27 17:58:32,538 INFO L175 Difference]: Start difference. First operand has 99 places, 118 transitions, 924 flow. Second operand 7 states and 160 transitions. [2024-06-27 17:58:32,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 159 transitions, 1372 flow [2024-06-27 17:58:32,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 159 transitions, 1303 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:32,607 INFO L231 Difference]: Finished difference. Result has 102 places, 120 transitions, 936 flow [2024-06-27 17:58:32,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=936, PETRI_PLACES=102, PETRI_TRANSITIONS=120} [2024-06-27 17:58:32,607 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 47 predicate places. [2024-06-27 17:58:32,607 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 120 transitions, 936 flow [2024-06-27 17:58:32,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:32,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:32,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:32,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:58:32,608 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:32,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:32,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1628728967, now seen corresponding path program 1 times [2024-06-27 17:58:32,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:32,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33821691] [2024-06-27 17:58:32,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:32,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:33,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:33,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33821691] [2024-06-27 17:58:33,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33821691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:33,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:33,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:33,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849849021] [2024-06-27 17:58:33,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:33,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:33,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:33,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:33,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:33,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2024-06-27 17:58:33,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 120 transitions, 936 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:33,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:33,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2024-06-27 17:58:33,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:34,436 INFO L124 PetriNetUnfolderBase]: 7131/11328 cut-off events. [2024-06-27 17:58:34,437 INFO L125 PetriNetUnfolderBase]: For 66078/66090 co-relation queries the response was YES. [2024-06-27 17:58:34,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41445 conditions, 11328 events. 7131/11328 cut-off events. For 66078/66090 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 73083 event pairs, 2770 based on Foata normal form. 9/10957 useless extension candidates. Maximal degree in co-relation 41403. Up to 9882 conditions per place. [2024-06-27 17:58:34,508 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 112 selfloop transitions, 26 changer transitions 0/155 dead transitions. [2024-06-27 17:58:34,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 155 transitions, 1394 flow [2024-06-27 17:58:34,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:34,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:34,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 17:58:34,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-06-27 17:58:34,510 INFO L175 Difference]: Start difference. First operand has 102 places, 120 transitions, 936 flow. Second operand 6 states and 141 transitions. [2024-06-27 17:58:34,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 155 transitions, 1394 flow [2024-06-27 17:58:34,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 155 transitions, 1335 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:34,584 INFO L231 Difference]: Finished difference. Result has 104 places, 129 transitions, 1045 flow [2024-06-27 17:58:34,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1045, PETRI_PLACES=104, PETRI_TRANSITIONS=129} [2024-06-27 17:58:34,584 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-27 17:58:34,584 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 129 transitions, 1045 flow [2024-06-27 17:58:34,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:34,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:34,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:34,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:58:34,585 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:34,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:34,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1129115341, now seen corresponding path program 1 times [2024-06-27 17:58:34,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:34,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48580151] [2024-06-27 17:58:34,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:34,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:34,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:35,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:35,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48580151] [2024-06-27 17:58:35,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48580151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:35,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:35,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:35,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177342053] [2024-06-27 17:58:35,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:35,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:35,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:35,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:35,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:35,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2024-06-27 17:58:35,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 129 transitions, 1045 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:35,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:35,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2024-06-27 17:58:35,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:36,422 INFO L124 PetriNetUnfolderBase]: 7192/11415 cut-off events. [2024-06-27 17:58:36,422 INFO L125 PetriNetUnfolderBase]: For 76660/76671 co-relation queries the response was YES. [2024-06-27 17:58:36,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44390 conditions, 11415 events. 7192/11415 cut-off events. For 76660/76671 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 73237 event pairs, 3064 based on Foata normal form. 7/11044 useless extension candidates. Maximal degree in co-relation 44346. Up to 10060 conditions per place. [2024-06-27 17:58:36,506 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 127 selfloop transitions, 32 changer transitions 0/176 dead transitions. [2024-06-27 17:58:36,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 176 transitions, 1572 flow [2024-06-27 17:58:36,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:36,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:36,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 17:58:36,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478134110787172 [2024-06-27 17:58:36,508 INFO L175 Difference]: Start difference. First operand has 104 places, 129 transitions, 1045 flow. Second operand 7 states and 164 transitions. [2024-06-27 17:58:36,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 176 transitions, 1572 flow [2024-06-27 17:58:36,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 176 transitions, 1506 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-27 17:58:36,624 INFO L231 Difference]: Finished difference. Result has 111 places, 145 transitions, 1220 flow [2024-06-27 17:58:36,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=990, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1220, PETRI_PLACES=111, PETRI_TRANSITIONS=145} [2024-06-27 17:58:36,625 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 56 predicate places. [2024-06-27 17:58:36,625 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 145 transitions, 1220 flow [2024-06-27 17:58:36,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:36,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:36,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:36,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:58:36,626 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:36,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:36,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1062386371, now seen corresponding path program 2 times [2024-06-27 17:58:36,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:36,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954904875] [2024-06-27 17:58:36,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:36,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:37,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:37,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954904875] [2024-06-27 17:58:37,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954904875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:37,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:37,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:37,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716988861] [2024-06-27 17:58:37,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:37,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:37,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:37,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:37,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:37,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2024-06-27 17:58:37,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 145 transitions, 1220 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:37,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:37,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2024-06-27 17:58:37,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:38,465 INFO L124 PetriNetUnfolderBase]: 7238/11480 cut-off events. [2024-06-27 17:58:38,466 INFO L125 PetriNetUnfolderBase]: For 85279/85290 co-relation queries the response was YES. [2024-06-27 17:58:38,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47250 conditions, 11480 events. 7238/11480 cut-off events. For 85279/85290 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 73598 event pairs, 3064 based on Foata normal form. 7/11108 useless extension candidates. Maximal degree in co-relation 47202. Up to 10094 conditions per place. [2024-06-27 17:58:38,571 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 125 selfloop transitions, 33 changer transitions 0/175 dead transitions. [2024-06-27 17:58:38,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 175 transitions, 1681 flow [2024-06-27 17:58:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:38,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:38,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-27 17:58:38,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-27 17:58:38,574 INFO L175 Difference]: Start difference. First operand has 111 places, 145 transitions, 1220 flow. Second operand 6 states and 142 transitions. [2024-06-27 17:58:38,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 175 transitions, 1681 flow [2024-06-27 17:58:38,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 175 transitions, 1632 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 17:58:38,696 INFO L231 Difference]: Finished difference. Result has 115 places, 149 transitions, 1310 flow [2024-06-27 17:58:38,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1310, PETRI_PLACES=115, PETRI_TRANSITIONS=149} [2024-06-27 17:58:38,697 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-27 17:58:38,697 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 149 transitions, 1310 flow [2024-06-27 17:58:38,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:38,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:38,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:38,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:58:38,697 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:38,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:38,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1049024131, now seen corresponding path program 3 times [2024-06-27 17:58:38,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:38,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581528390] [2024-06-27 17:58:38,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:38,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:39,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:39,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581528390] [2024-06-27 17:58:39,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581528390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:39,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:39,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:39,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371055936] [2024-06-27 17:58:39,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:39,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:39,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:39,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:39,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:39,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2024-06-27 17:58:39,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 149 transitions, 1310 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:39,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:39,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2024-06-27 17:58:39,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:40,506 INFO L124 PetriNetUnfolderBase]: 7257/11514 cut-off events. [2024-06-27 17:58:40,506 INFO L125 PetriNetUnfolderBase]: For 91684/91695 co-relation queries the response was YES. [2024-06-27 17:58:40,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47855 conditions, 11514 events. 7257/11514 cut-off events. For 91684/91695 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 73745 event pairs, 3061 based on Foata normal form. 10/11144 useless extension candidates. Maximal degree in co-relation 47805. Up to 9917 conditions per place. [2024-06-27 17:58:40,582 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 121 selfloop transitions, 45 changer transitions 0/183 dead transitions. [2024-06-27 17:58:40,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 183 transitions, 1887 flow [2024-06-27 17:58:40,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:40,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:40,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-27 17:58:40,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-27 17:58:40,584 INFO L175 Difference]: Start difference. First operand has 115 places, 149 transitions, 1310 flow. Second operand 6 states and 142 transitions. [2024-06-27 17:58:40,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 183 transitions, 1887 flow [2024-06-27 17:58:40,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 183 transitions, 1789 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:40,708 INFO L231 Difference]: Finished difference. Result has 118 places, 158 transitions, 1471 flow [2024-06-27 17:58:40,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1471, PETRI_PLACES=118, PETRI_TRANSITIONS=158} [2024-06-27 17:58:40,709 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2024-06-27 17:58:40,709 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 158 transitions, 1471 flow [2024-06-27 17:58:40,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:40,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:40,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:40,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:58:40,710 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:40,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:40,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1055713187, now seen corresponding path program 1 times [2024-06-27 17:58:40,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:40,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777992540] [2024-06-27 17:58:40,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:40,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:41,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:41,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777992540] [2024-06-27 17:58:41,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777992540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:41,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:41,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:41,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872908256] [2024-06-27 17:58:41,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:41,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:41,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:41,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:41,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:41,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:58:41,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 158 transitions, 1471 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:41,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:41,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:58:41,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:42,603 INFO L124 PetriNetUnfolderBase]: 7745/12036 cut-off events. [2024-06-27 17:58:42,603 INFO L125 PetriNetUnfolderBase]: For 99548/99548 co-relation queries the response was YES. [2024-06-27 17:58:42,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52279 conditions, 12036 events. 7745/12036 cut-off events. For 99548/99548 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 74751 event pairs, 3435 based on Foata normal form. 4/11679 useless extension candidates. Maximal degree in co-relation 52227. Up to 10893 conditions per place. [2024-06-27 17:58:42,716 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 167 selfloop transitions, 14 changer transitions 0/188 dead transitions. [2024-06-27 17:58:42,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 188 transitions, 1992 flow [2024-06-27 17:58:42,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:42,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:42,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-27 17:58:42,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-27 17:58:42,718 INFO L175 Difference]: Start difference. First operand has 118 places, 158 transitions, 1471 flow. Second operand 6 states and 130 transitions. [2024-06-27 17:58:42,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 188 transitions, 1992 flow [2024-06-27 17:58:42,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 188 transitions, 1880 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-27 17:58:42,856 INFO L231 Difference]: Finished difference. Result has 122 places, 166 transitions, 1494 flow [2024-06-27 17:58:42,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1359, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1494, PETRI_PLACES=122, PETRI_TRANSITIONS=166} [2024-06-27 17:58:42,856 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 67 predicate places. [2024-06-27 17:58:42,857 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 166 transitions, 1494 flow [2024-06-27 17:58:42,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:42,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:42,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:42,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:58:42,857 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:42,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:42,858 INFO L85 PathProgramCache]: Analyzing trace with hash -356376437, now seen corresponding path program 2 times [2024-06-27 17:58:42,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:42,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135271260] [2024-06-27 17:58:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:42,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:43,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:43,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:43,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135271260] [2024-06-27 17:58:43,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135271260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:43,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:43,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:43,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832675298] [2024-06-27 17:58:43,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:43,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:43,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:43,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:43,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:43,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:58:43,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 166 transitions, 1494 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:43,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:43,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:58:43,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:44,805 INFO L124 PetriNetUnfolderBase]: 7790/12098 cut-off events. [2024-06-27 17:58:44,806 INFO L125 PetriNetUnfolderBase]: For 110340/110342 co-relation queries the response was YES. [2024-06-27 17:58:44,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54709 conditions, 12098 events. 7790/12098 cut-off events. For 110340/110342 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 75226 event pairs, 3421 based on Foata normal form. 6/11743 useless extension candidates. Maximal degree in co-relation 54655. Up to 10909 conditions per place. [2024-06-27 17:58:44,904 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 165 selfloop transitions, 21 changer transitions 0/193 dead transitions. [2024-06-27 17:58:44,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 193 transitions, 2022 flow [2024-06-27 17:58:44,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:44,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:44,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-27 17:58:44,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 17:58:44,906 INFO L175 Difference]: Start difference. First operand has 122 places, 166 transitions, 1494 flow. Second operand 6 states and 133 transitions. [2024-06-27 17:58:44,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 193 transitions, 2022 flow [2024-06-27 17:58:45,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 193 transitions, 1970 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 17:58:45,033 INFO L231 Difference]: Finished difference. Result has 125 places, 170 transitions, 1551 flow [2024-06-27 17:58:45,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1442, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1551, PETRI_PLACES=125, PETRI_TRANSITIONS=170} [2024-06-27 17:58:45,034 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 70 predicate places. [2024-06-27 17:58:45,034 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 170 transitions, 1551 flow [2024-06-27 17:58:45,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:45,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:45,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:45,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:58:45,034 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:45,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:45,035 INFO L85 PathProgramCache]: Analyzing trace with hash -356366517, now seen corresponding path program 1 times [2024-06-27 17:58:45,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:45,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636334922] [2024-06-27 17:58:45,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:45,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:45,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:45,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636334922] [2024-06-27 17:58:45,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636334922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:45,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:45,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:45,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200467838] [2024-06-27 17:58:45,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:45,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:45,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:45,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:45,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:45,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2024-06-27 17:58:45,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 170 transitions, 1551 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:45,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:45,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2024-06-27 17:58:45,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:47,378 INFO L124 PetriNetUnfolderBase]: 7486/11854 cut-off events. [2024-06-27 17:58:47,378 INFO L125 PetriNetUnfolderBase]: For 120226/120238 co-relation queries the response was YES. [2024-06-27 17:58:47,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55157 conditions, 11854 events. 7486/11854 cut-off events. For 120226/120238 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 76228 event pairs, 2741 based on Foata normal form. 9/11468 useless extension candidates. Maximal degree in co-relation 55102. Up to 10100 conditions per place. [2024-06-27 17:58:47,471 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 148 selfloop transitions, 56 changer transitions 0/221 dead transitions. [2024-06-27 17:58:47,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 221 transitions, 2357 flow [2024-06-27 17:58:47,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:47,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:47,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 17:58:47,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4868804664723032 [2024-06-27 17:58:47,473 INFO L175 Difference]: Start difference. First operand has 125 places, 170 transitions, 1551 flow. Second operand 7 states and 167 transitions. [2024-06-27 17:58:47,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 221 transitions, 2357 flow [2024-06-27 17:58:47,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 221 transitions, 2282 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:47,630 INFO L231 Difference]: Finished difference. Result has 131 places, 184 transitions, 1864 flow [2024-06-27 17:58:47,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1864, PETRI_PLACES=131, PETRI_TRANSITIONS=184} [2024-06-27 17:58:47,630 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 76 predicate places. [2024-06-27 17:58:47,630 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 184 transitions, 1864 flow [2024-06-27 17:58:47,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:47,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:47,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:47,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:58:47,631 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:47,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:47,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1278896546, now seen corresponding path program 1 times [2024-06-27 17:58:47,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:47,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638323523] [2024-06-27 17:58:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:47,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:48,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:48,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638323523] [2024-06-27 17:58:48,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638323523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:48,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:48,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:48,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706245219] [2024-06-27 17:58:48,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:48,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:48,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:48,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:48,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:48,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2024-06-27 17:58:48,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 184 transitions, 1864 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:48,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:48,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2024-06-27 17:58:48,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:50,021 INFO L124 PetriNetUnfolderBase]: 7838/12284 cut-off events. [2024-06-27 17:58:50,022 INFO L125 PetriNetUnfolderBase]: For 140485/140551 co-relation queries the response was YES. [2024-06-27 17:58:50,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59876 conditions, 12284 events. 7838/12284 cut-off events. For 140485/140551 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 77152 event pairs, 2263 based on Foata normal form. 43/11927 useless extension candidates. Maximal degree in co-relation 59817. Up to 10386 conditions per place. [2024-06-27 17:58:50,132 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 165 selfloop transitions, 44 changer transitions 0/232 dead transitions. [2024-06-27 17:58:50,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 232 transitions, 2622 flow [2024-06-27 17:58:50,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:50,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:50,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 17:58:50,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014577259475219 [2024-06-27 17:58:50,134 INFO L175 Difference]: Start difference. First operand has 131 places, 184 transitions, 1864 flow. Second operand 7 states and 172 transitions. [2024-06-27 17:58:50,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 232 transitions, 2622 flow [2024-06-27 17:58:50,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 232 transitions, 2544 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-06-27 17:58:50,332 INFO L231 Difference]: Finished difference. Result has 137 places, 190 transitions, 2004 flow [2024-06-27 17:58:50,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2004, PETRI_PLACES=137, PETRI_TRANSITIONS=190} [2024-06-27 17:58:50,333 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 82 predicate places. [2024-06-27 17:58:50,333 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 190 transitions, 2004 flow [2024-06-27 17:58:50,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:50,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:50,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:50,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:58:50,333 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:50,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:50,360 INFO L85 PathProgramCache]: Analyzing trace with hash -677794998, now seen corresponding path program 2 times [2024-06-27 17:58:50,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:50,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90550288] [2024-06-27 17:58:50,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:50,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:51,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:51,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90550288] [2024-06-27 17:58:51,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90550288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:51,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:51,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:58:51,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499465453] [2024-06-27 17:58:51,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:51,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:58:51,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:51,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:58:51,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:58:51,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:58:51,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 190 transitions, 2004 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:51,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:51,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:58:51,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:53,834 INFO L124 PetriNetUnfolderBase]: 8345/12927 cut-off events. [2024-06-27 17:58:53,835 INFO L125 PetriNetUnfolderBase]: For 163735/163737 co-relation queries the response was YES. [2024-06-27 17:58:53,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65481 conditions, 12927 events. 8345/12927 cut-off events. For 163735/163737 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 80396 event pairs, 3011 based on Foata normal form. 10/12565 useless extension candidates. Maximal degree in co-relation 65419. Up to 11468 conditions per place. [2024-06-27 17:58:53,924 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 214 selfloop transitions, 46 changer transitions 0/267 dead transitions. [2024-06-27 17:58:53,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 267 transitions, 2995 flow [2024-06-27 17:58:53,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:58:53,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:58:53,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-27 17:58:53,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47845804988662133 [2024-06-27 17:58:53,926 INFO L175 Difference]: Start difference. First operand has 137 places, 190 transitions, 2004 flow. Second operand 9 states and 211 transitions. [2024-06-27 17:58:53,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 267 transitions, 2995 flow [2024-06-27 17:58:54,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 267 transitions, 2835 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-27 17:58:54,145 INFO L231 Difference]: Finished difference. Result has 146 places, 212 transitions, 2272 flow [2024-06-27 17:58:54,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1886, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2272, PETRI_PLACES=146, PETRI_TRANSITIONS=212} [2024-06-27 17:58:54,146 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 91 predicate places. [2024-06-27 17:58:54,146 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 212 transitions, 2272 flow [2024-06-27 17:58:54,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:54,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:54,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:54,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:58:54,146 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:54,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:54,147 INFO L85 PathProgramCache]: Analyzing trace with hash -773873910, now seen corresponding path program 3 times [2024-06-27 17:58:54,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:54,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657198554] [2024-06-27 17:58:54,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:54,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:55,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:55,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657198554] [2024-06-27 17:58:55,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657198554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:55,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:55,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:58:55,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174712954] [2024-06-27 17:58:55,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:55,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:58:55,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:55,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:58:55,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:58:55,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:58:55,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 212 transitions, 2272 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:55,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:55,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:58:55,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:57,670 INFO L124 PetriNetUnfolderBase]: 8329/12903 cut-off events. [2024-06-27 17:58:57,671 INFO L125 PetriNetUnfolderBase]: For 170185/170189 co-relation queries the response was YES. [2024-06-27 17:58:57,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65956 conditions, 12903 events. 8329/12903 cut-off events. For 170185/170189 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 80268 event pairs, 2997 based on Foata normal form. 12/12543 useless extension candidates. Maximal degree in co-relation 65889. Up to 11276 conditions per place. [2024-06-27 17:58:57,793 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 207 selfloop transitions, 48 changer transitions 0/262 dead transitions. [2024-06-27 17:58:57,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 262 transitions, 3000 flow [2024-06-27 17:58:57,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:57,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 17:58:57,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744897959183674 [2024-06-27 17:58:57,795 INFO L175 Difference]: Start difference. First operand has 146 places, 212 transitions, 2272 flow. Second operand 8 states and 186 transitions. [2024-06-27 17:58:57,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 262 transitions, 3000 flow [2024-06-27 17:58:58,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 262 transitions, 2904 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 17:58:58,082 INFO L231 Difference]: Finished difference. Result has 151 places, 212 transitions, 2284 flow [2024-06-27 17:58:58,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2284, PETRI_PLACES=151, PETRI_TRANSITIONS=212} [2024-06-27 17:58:58,083 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 96 predicate places. [2024-06-27 17:58:58,083 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 212 transitions, 2284 flow [2024-06-27 17:58:58,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:58,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:58,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:58,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:58:58,084 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:58,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:58,084 INFO L85 PathProgramCache]: Analyzing trace with hash -771072440, now seen corresponding path program 1 times [2024-06-27 17:58:58,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:58,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510782132] [2024-06-27 17:58:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:58,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:59,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:59,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510782132] [2024-06-27 17:58:59,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510782132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:59,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:59,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:58:59,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179686993] [2024-06-27 17:58:59,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:59,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:58:59,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:59,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:58:59,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:58:59,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:58:59,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 212 transitions, 2284 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:59,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:59,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:58:59,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:01,582 INFO L124 PetriNetUnfolderBase]: 8453/13102 cut-off events. [2024-06-27 17:59:01,583 INFO L125 PetriNetUnfolderBase]: For 180022/180026 co-relation queries the response was YES. [2024-06-27 17:59:01,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67332 conditions, 13102 events. 8453/13102 cut-off events. For 180022/180026 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 81787 event pairs, 3050 based on Foata normal form. 12/12733 useless extension candidates. Maximal degree in co-relation 67264. Up to 11439 conditions per place. [2024-06-27 17:59:01,708 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 219 selfloop transitions, 48 changer transitions 0/274 dead transitions. [2024-06-27 17:59:01,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 274 transitions, 3170 flow [2024-06-27 17:59:01,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:01,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:01,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 17:59:01,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-27 17:59:01,713 INFO L175 Difference]: Start difference. First operand has 151 places, 212 transitions, 2284 flow. Second operand 8 states and 192 transitions. [2024-06-27 17:59:01,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 274 transitions, 3170 flow [2024-06-27 17:59:01,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 274 transitions, 3060 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 17:59:01,937 INFO L231 Difference]: Finished difference. Result has 153 places, 218 transitions, 2403 flow [2024-06-27 17:59:01,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2174, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2403, PETRI_PLACES=153, PETRI_TRANSITIONS=218} [2024-06-27 17:59:01,938 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 98 predicate places. [2024-06-27 17:59:01,938 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 218 transitions, 2403 flow [2024-06-27 17:59:01,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:01,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:01,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:01,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:59:01,939 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:01,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:01,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1107395192, now seen corresponding path program 2 times [2024-06-27 17:59:01,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:01,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027806570] [2024-06-27 17:59:01,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:01,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:03,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:03,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027806570] [2024-06-27 17:59:03,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027806570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:03,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:03,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:59:03,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896194473] [2024-06-27 17:59:03,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:03,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:59:03,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:03,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:59:03,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:59:03,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:59:03,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 218 transitions, 2403 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:03,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:03,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:59:03,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:05,401 INFO L124 PetriNetUnfolderBase]: 8701/13457 cut-off events. [2024-06-27 17:59:05,402 INFO L125 PetriNetUnfolderBase]: For 194642/194644 co-relation queries the response was YES. [2024-06-27 17:59:05,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71248 conditions, 13457 events. 8701/13457 cut-off events. For 194642/194644 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 83914 event pairs, 2411 based on Foata normal form. 8/13080 useless extension candidates. Maximal degree in co-relation 71178. Up to 10642 conditions per place. [2024-06-27 17:59:05,534 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 214 selfloop transitions, 77 changer transitions 0/298 dead transitions. [2024-06-27 17:59:05,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 298 transitions, 3701 flow [2024-06-27 17:59:05,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:05,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:05,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 17:59:05,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-27 17:59:05,536 INFO L175 Difference]: Start difference. First operand has 153 places, 218 transitions, 2403 flow. Second operand 8 states and 210 transitions. [2024-06-27 17:59:05,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 298 transitions, 3701 flow [2024-06-27 17:59:05,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 298 transitions, 3510 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 17:59:05,853 INFO L231 Difference]: Finished difference. Result has 156 places, 228 transitions, 2573 flow [2024-06-27 17:59:05,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2218, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2573, PETRI_PLACES=156, PETRI_TRANSITIONS=228} [2024-06-27 17:59:05,854 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 101 predicate places. [2024-06-27 17:59:05,854 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 228 transitions, 2573 flow [2024-06-27 17:59:05,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:05,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:05,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:05,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:59:05,855 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:05,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:05,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1107401702, now seen corresponding path program 3 times [2024-06-27 17:59:05,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:05,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725811757] [2024-06-27 17:59:05,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:05,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:06,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:06,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:06,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725811757] [2024-06-27 17:59:06,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725811757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:06,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:06,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:59:06,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745116027] [2024-06-27 17:59:06,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:06,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:59:06,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:06,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:59:06,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:59:07,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:59:07,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 228 transitions, 2573 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:07,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:07,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:59:07,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:09,282 INFO L124 PetriNetUnfolderBase]: 8681/13429 cut-off events. [2024-06-27 17:59:09,282 INFO L125 PetriNetUnfolderBase]: For 205729/205731 co-relation queries the response was YES. [2024-06-27 17:59:09,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72855 conditions, 13429 events. 8681/13429 cut-off events. For 205729/205731 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 83784 event pairs, 2422 based on Foata normal form. 8/13052 useless extension candidates. Maximal degree in co-relation 72785. Up to 10630 conditions per place. [2024-06-27 17:59:09,391 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 207 selfloop transitions, 82 changer transitions 0/296 dead transitions. [2024-06-27 17:59:09,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 296 transitions, 3633 flow [2024-06-27 17:59:09,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:09,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:09,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 17:59:09,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5255102040816326 [2024-06-27 17:59:09,392 INFO L175 Difference]: Start difference. First operand has 156 places, 228 transitions, 2573 flow. Second operand 8 states and 206 transitions. [2024-06-27 17:59:09,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 296 transitions, 3633 flow [2024-06-27 17:59:09,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 296 transitions, 3512 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-27 17:59:09,662 INFO L231 Difference]: Finished difference. Result has 161 places, 230 transitions, 2670 flow [2024-06-27 17:59:09,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2470, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2670, PETRI_PLACES=161, PETRI_TRANSITIONS=230} [2024-06-27 17:59:09,662 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 106 predicate places. [2024-06-27 17:59:09,662 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 230 transitions, 2670 flow [2024-06-27 17:59:09,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:09,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:09,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:09,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:59:09,663 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:09,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:09,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1107217252, now seen corresponding path program 4 times [2024-06-27 17:59:09,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:09,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996164411] [2024-06-27 17:59:09,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:09,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:10,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:10,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996164411] [2024-06-27 17:59:10,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996164411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:10,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:10,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:59:10,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422981276] [2024-06-27 17:59:10,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:10,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:59:10,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:10,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:59:10,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:59:10,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:59:10,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 230 transitions, 2670 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:10,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:10,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:59:10,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:12,934 INFO L124 PetriNetUnfolderBase]: 8749/13540 cut-off events. [2024-06-27 17:59:12,934 INFO L125 PetriNetUnfolderBase]: For 210512/210514 co-relation queries the response was YES. [2024-06-27 17:59:13,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73729 conditions, 13540 events. 8749/13540 cut-off events. For 210512/210514 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 84695 event pairs, 2681 based on Foata normal form. 8/13160 useless extension candidates. Maximal degree in co-relation 73657. Up to 11589 conditions per place. [2024-06-27 17:59:13,111 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 215 selfloop transitions, 62 changer transitions 0/284 dead transitions. [2024-06-27 17:59:13,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 284 transitions, 3510 flow [2024-06-27 17:59:13,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:13,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:13,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 17:59:13,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-27 17:59:13,113 INFO L175 Difference]: Start difference. First operand has 161 places, 230 transitions, 2670 flow. Second operand 8 states and 192 transitions. [2024-06-27 17:59:13,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 284 transitions, 3510 flow [2024-06-27 17:59:13,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 284 transitions, 3413 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 17:59:13,466 INFO L231 Difference]: Finished difference. Result has 165 places, 233 transitions, 2779 flow [2024-06-27 17:59:13,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2573, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2779, PETRI_PLACES=165, PETRI_TRANSITIONS=233} [2024-06-27 17:59:13,468 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 110 predicate places. [2024-06-27 17:59:13,469 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 233 transitions, 2779 flow [2024-06-27 17:59:13,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:13,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:13,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:13,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:59:13,469 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:13,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:13,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1894771951, now seen corresponding path program 1 times [2024-06-27 17:59:13,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:13,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239855232] [2024-06-27 17:59:13,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:13,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:14,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:14,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239855232] [2024-06-27 17:59:14,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239855232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:14,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:14,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:14,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431571418] [2024-06-27 17:59:14,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:14,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:14,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:14,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:14,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:14,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2024-06-27 17:59:14,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 233 transitions, 2779 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:14,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:14,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2024-06-27 17:59:14,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:16,081 INFO L124 PetriNetUnfolderBase]: 8259/12980 cut-off events. [2024-06-27 17:59:16,081 INFO L125 PetriNetUnfolderBase]: For 223991/224039 co-relation queries the response was YES. [2024-06-27 17:59:16,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71951 conditions, 12980 events. 8259/12980 cut-off events. For 223991/224039 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 83205 event pairs, 2998 based on Foata normal form. 14/12566 useless extension candidates. Maximal degree in co-relation 71878. Up to 11391 conditions per place. [2024-06-27 17:59:16,213 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 200 selfloop transitions, 44 changer transitions 0/262 dead transitions. [2024-06-27 17:59:16,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 262 transitions, 3433 flow [2024-06-27 17:59:16,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:59:16,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:59:16,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 17:59:16,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-06-27 17:59:16,215 INFO L175 Difference]: Start difference. First operand has 165 places, 233 transitions, 2779 flow. Second operand 6 states and 141 transitions. [2024-06-27 17:59:16,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 262 transitions, 3433 flow [2024-06-27 17:59:16,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 262 transitions, 3209 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-27 17:59:16,665 INFO L231 Difference]: Finished difference. Result has 165 places, 236 transitions, 2728 flow [2024-06-27 17:59:16,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2567, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2728, PETRI_PLACES=165, PETRI_TRANSITIONS=236} [2024-06-27 17:59:16,666 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 110 predicate places. [2024-06-27 17:59:16,666 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 236 transitions, 2728 flow [2024-06-27 17:59:16,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:16,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:16,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:16,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:59:16,666 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:16,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:16,667 INFO L85 PathProgramCache]: Analyzing trace with hash -483466968, now seen corresponding path program 1 times [2024-06-27 17:59:16,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:16,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846137441] [2024-06-27 17:59:16,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:16,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:17,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:17,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846137441] [2024-06-27 17:59:17,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846137441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:17,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:17,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:59:17,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131201695] [2024-06-27 17:59:17,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:17,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:59:17,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:17,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:59:17,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:59:18,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:59:18,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 236 transitions, 2728 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:18,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:18,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:59:18,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:20,195 INFO L124 PetriNetUnfolderBase]: 8812/13634 cut-off events. [2024-06-27 17:59:20,195 INFO L125 PetriNetUnfolderBase]: For 234351/234357 co-relation queries the response was YES. [2024-06-27 17:59:20,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74848 conditions, 13634 events. 8812/13634 cut-off events. For 234351/234357 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 85269 event pairs, 3036 based on Foata normal form. 12/13258 useless extension candidates. Maximal degree in co-relation 74774. Up to 11689 conditions per place. [2024-06-27 17:59:20,328 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 241 selfloop transitions, 53 changer transitions 0/301 dead transitions. [2024-06-27 17:59:20,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 301 transitions, 3708 flow [2024-06-27 17:59:20,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:20,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:20,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 17:59:20,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5025510204081632 [2024-06-27 17:59:20,329 INFO L175 Difference]: Start difference. First operand has 165 places, 236 transitions, 2728 flow. Second operand 8 states and 197 transitions. [2024-06-27 17:59:20,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 301 transitions, 3708 flow [2024-06-27 17:59:20,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 301 transitions, 3623 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 17:59:20,677 INFO L231 Difference]: Finished difference. Result has 169 places, 239 transitions, 2821 flow [2024-06-27 17:59:20,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2643, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2821, PETRI_PLACES=169, PETRI_TRANSITIONS=239} [2024-06-27 17:59:20,677 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 114 predicate places. [2024-06-27 17:59:20,677 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 239 transitions, 2821 flow [2024-06-27 17:59:20,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:20,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:20,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:20,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:59:20,678 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:20,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:20,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1112365924, now seen corresponding path program 5 times [2024-06-27 17:59:20,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:20,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839814909] [2024-06-27 17:59:20,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:20,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:21,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:21,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839814909] [2024-06-27 17:59:21,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839814909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:21,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:21,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:59:21,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666736330] [2024-06-27 17:59:21,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:21,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:59:21,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:21,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:59:21,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:59:21,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:59:21,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 239 transitions, 2821 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:21,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:21,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:59:21,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:24,330 INFO L124 PetriNetUnfolderBase]: 8796/13627 cut-off events. [2024-06-27 17:59:24,330 INFO L125 PetriNetUnfolderBase]: For 239093/239100 co-relation queries the response was YES. [2024-06-27 17:59:24,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75729 conditions, 13627 events. 8796/13627 cut-off events. For 239093/239100 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 85338 event pairs, 2661 based on Foata normal form. 12/13242 useless extension candidates. Maximal degree in co-relation 75654. Up to 11659 conditions per place. [2024-06-27 17:59:24,437 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 222 selfloop transitions, 62 changer transitions 0/291 dead transitions. [2024-06-27 17:59:24,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 291 transitions, 3681 flow [2024-06-27 17:59:24,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:24,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:24,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 17:59:24,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 17:59:24,438 INFO L175 Difference]: Start difference. First operand has 169 places, 239 transitions, 2821 flow. Second operand 8 states and 189 transitions. [2024-06-27 17:59:24,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 291 transitions, 3681 flow [2024-06-27 17:59:24,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 291 transitions, 3527 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 17:59:24,805 INFO L231 Difference]: Finished difference. Result has 171 places, 242 transitions, 2883 flow [2024-06-27 17:59:24,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2667, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2883, PETRI_PLACES=171, PETRI_TRANSITIONS=242} [2024-06-27 17:59:24,805 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 116 predicate places. [2024-06-27 17:59:24,805 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 242 transitions, 2883 flow [2024-06-27 17:59:24,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:24,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:24,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:24,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:59:24,806 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:24,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:24,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1288548702, now seen corresponding path program 4 times [2024-06-27 17:59:24,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:24,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648008710] [2024-06-27 17:59:24,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:24,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:26,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:26,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648008710] [2024-06-27 17:59:26,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648008710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:26,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:26,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:59:26,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307157306] [2024-06-27 17:59:26,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:26,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:59:26,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:26,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:59:26,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:59:26,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:59:26,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 242 transitions, 2883 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:26,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:26,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:59:26,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:28,363 INFO L124 PetriNetUnfolderBase]: 9024/13928 cut-off events. [2024-06-27 17:59:28,363 INFO L125 PetriNetUnfolderBase]: For 267076/267083 co-relation queries the response was YES. [2024-06-27 17:59:28,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78867 conditions, 13928 events. 9024/13928 cut-off events. For 267076/267083 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 86851 event pairs, 2406 based on Foata normal form. 12/13548 useless extension candidates. Maximal degree in co-relation 78791. Up to 10948 conditions per place. [2024-06-27 17:59:28,524 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 223 selfloop transitions, 85 changer transitions 0/315 dead transitions. [2024-06-27 17:59:28,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 315 transitions, 4201 flow [2024-06-27 17:59:28,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:28,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:28,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 17:59:28,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5280612244897959 [2024-06-27 17:59:28,530 INFO L175 Difference]: Start difference. First operand has 171 places, 242 transitions, 2883 flow. Second operand 8 states and 207 transitions. [2024-06-27 17:59:28,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 315 transitions, 4201 flow [2024-06-27 17:59:29,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 315 transitions, 4009 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 17:59:29,023 INFO L231 Difference]: Finished difference. Result has 174 places, 249 transitions, 3035 flow [2024-06-27 17:59:29,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2691, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3035, PETRI_PLACES=174, PETRI_TRANSITIONS=249} [2024-06-27 17:59:29,024 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 119 predicate places. [2024-06-27 17:59:29,024 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 249 transitions, 3035 flow [2024-06-27 17:59:29,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:29,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:29,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:29,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:59:29,025 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:29,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:29,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1288555212, now seen corresponding path program 5 times [2024-06-27 17:59:29,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:29,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823639158] [2024-06-27 17:59:29,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:29,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:30,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:30,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823639158] [2024-06-27 17:59:30,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823639158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:30,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:30,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:59:30,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201799486] [2024-06-27 17:59:30,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:30,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:59:30,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:30,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:59:30,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:59:30,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:59:30,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 249 transitions, 3035 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:30,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:30,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:59:30,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:32,534 INFO L124 PetriNetUnfolderBase]: 9004/13828 cut-off events. [2024-06-27 17:59:32,534 INFO L125 PetriNetUnfolderBase]: For 277862/277869 co-relation queries the response was YES. [2024-06-27 17:59:32,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79545 conditions, 13828 events. 9004/13828 cut-off events. For 277862/277869 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 85516 event pairs, 2326 based on Foata normal form. 12/13472 useless extension candidates. Maximal degree in co-relation 79467. Up to 10936 conditions per place. [2024-06-27 17:59:32,706 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 219 selfloop transitions, 86 changer transitions 0/312 dead transitions. [2024-06-27 17:59:32,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 312 transitions, 4099 flow [2024-06-27 17:59:32,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:32,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 17:59:32,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-27 17:59:32,708 INFO L175 Difference]: Start difference. First operand has 174 places, 249 transitions, 3035 flow. Second operand 8 states and 203 transitions. [2024-06-27 17:59:32,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 312 transitions, 4099 flow [2024-06-27 17:59:33,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 312 transitions, 3773 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 17:59:33,184 INFO L231 Difference]: Finished difference. Result has 175 places, 249 transitions, 2890 flow [2024-06-27 17:59:33,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2709, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2890, PETRI_PLACES=175, PETRI_TRANSITIONS=249} [2024-06-27 17:59:33,184 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 120 predicate places. [2024-06-27 17:59:33,185 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 249 transitions, 2890 flow [2024-06-27 17:59:33,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:33,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:33,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:33,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 17:59:33,185 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:33,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:33,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1290934910, now seen corresponding path program 2 times [2024-06-27 17:59:33,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:33,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349363018] [2024-06-27 17:59:33,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:33,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:34,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:34,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349363018] [2024-06-27 17:59:34,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349363018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:34,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:34,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:59:34,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241552155] [2024-06-27 17:59:34,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:34,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:59:34,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:34,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:59:34,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:59:34,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:59:34,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 249 transitions, 2890 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:34,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:34,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:59:34,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:36,697 INFO L124 PetriNetUnfolderBase]: 9088/13973 cut-off events. [2024-06-27 17:59:36,697 INFO L125 PetriNetUnfolderBase]: For 274589/274598 co-relation queries the response was YES. [2024-06-27 17:59:36,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79524 conditions, 13973 events. 9088/13973 cut-off events. For 274589/274598 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 86773 event pairs, 2970 based on Foata normal form. 14/13613 useless extension candidates. Maximal degree in co-relation 79446. Up to 12077 conditions per place. [2024-06-27 17:59:36,873 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 251 selfloop transitions, 53 changer transitions 0/311 dead transitions. [2024-06-27 17:59:36,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 311 transitions, 3878 flow [2024-06-27 17:59:36,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:36,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:36,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 17:59:36,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49489795918367346 [2024-06-27 17:59:36,874 INFO L175 Difference]: Start difference. First operand has 175 places, 249 transitions, 2890 flow. Second operand 8 states and 194 transitions. [2024-06-27 17:59:36,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 311 transitions, 3878 flow [2024-06-27 17:59:37,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 311 transitions, 3691 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 17:59:37,396 INFO L231 Difference]: Finished difference. Result has 176 places, 252 transitions, 2891 flow [2024-06-27 17:59:37,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2703, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2891, PETRI_PLACES=176, PETRI_TRANSITIONS=252} [2024-06-27 17:59:37,397 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 121 predicate places. [2024-06-27 17:59:37,397 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 252 transitions, 2891 flow [2024-06-27 17:59:37,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:37,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:37,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:37,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 17:59:37,398 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:37,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:37,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1061255228, now seen corresponding path program 6 times [2024-06-27 17:59:37,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:37,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783206884] [2024-06-27 17:59:37,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:37,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:38,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:38,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783206884] [2024-06-27 17:59:38,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783206884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:38,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:38,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:59:38,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261978252] [2024-06-27 17:59:38,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:38,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:59:38,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:38,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:59:38,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:59:38,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:59:38,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 252 transitions, 2891 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:38,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:38,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:59:38,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:40,808 INFO L124 PetriNetUnfolderBase]: 9088/14061 cut-off events. [2024-06-27 17:59:40,808 INFO L125 PetriNetUnfolderBase]: For 286709/286709 co-relation queries the response was YES. [2024-06-27 17:59:40,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79852 conditions, 14061 events. 9088/14061 cut-off events. For 286709/286709 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 88306 event pairs, 3498 based on Foata normal form. 8/13667 useless extension candidates. Maximal degree in co-relation 79774. Up to 12573 conditions per place. [2024-06-27 17:59:40,983 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 268 selfloop transitions, 30 changer transitions 0/305 dead transitions. [2024-06-27 17:59:40,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 305 transitions, 3795 flow [2024-06-27 17:59:40,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:40,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:40,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 17:59:40,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744897959183674 [2024-06-27 17:59:40,984 INFO L175 Difference]: Start difference. First operand has 176 places, 252 transitions, 2891 flow. Second operand 8 states and 186 transitions. [2024-06-27 17:59:40,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 305 transitions, 3795 flow [2024-06-27 17:59:41,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 305 transitions, 3603 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 17:59:41,487 INFO L231 Difference]: Finished difference. Result has 178 places, 256 transitions, 2862 flow [2024-06-27 17:59:41,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2713, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2862, PETRI_PLACES=178, PETRI_TRANSITIONS=256} [2024-06-27 17:59:41,487 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 123 predicate places. [2024-06-27 17:59:41,487 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 256 transitions, 2862 flow [2024-06-27 17:59:41,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:41,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:41,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:41,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 17:59:41,488 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:41,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:41,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1060958000, now seen corresponding path program 3 times [2024-06-27 17:59:41,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:41,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660798661] [2024-06-27 17:59:41,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:41,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:42,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:42,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660798661] [2024-06-27 17:59:42,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660798661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:42,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:42,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:59:42,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743317366] [2024-06-27 17:59:42,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:42,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:59:42,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:42,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:59:42,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:59:42,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:59:42,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 256 transitions, 2862 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:42,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:42,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:59:42,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:45,229 INFO L124 PetriNetUnfolderBase]: 9172/14197 cut-off events. [2024-06-27 17:59:45,229 INFO L125 PetriNetUnfolderBase]: For 298944/298944 co-relation queries the response was YES. [2024-06-27 17:59:45,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80462 conditions, 14197 events. 9172/14197 cut-off events. For 298944/298944 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 89317 event pairs, 3511 based on Foata normal form. 8/13799 useless extension candidates. Maximal degree in co-relation 80383. Up to 12697 conditions per place. [2024-06-27 17:59:45,348 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 272 selfloop transitions, 29 changer transitions 0/308 dead transitions. [2024-06-27 17:59:45,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 308 transitions, 3768 flow [2024-06-27 17:59:45,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:45,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 17:59:45,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4719387755102041 [2024-06-27 17:59:45,349 INFO L175 Difference]: Start difference. First operand has 178 places, 256 transitions, 2862 flow. Second operand 8 states and 185 transitions. [2024-06-27 17:59:45,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 308 transitions, 3768 flow [2024-06-27 17:59:45,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 308 transitions, 3661 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 17:59:45,787 INFO L231 Difference]: Finished difference. Result has 180 places, 259 transitions, 2903 flow [2024-06-27 17:59:45,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2755, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2903, PETRI_PLACES=180, PETRI_TRANSITIONS=259} [2024-06-27 17:59:45,788 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 125 predicate places. [2024-06-27 17:59:45,788 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 259 transitions, 2903 flow [2024-06-27 17:59:45,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:45,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:45,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:45,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 17:59:45,788 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:45,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:45,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1631152526, now seen corresponding path program 4 times [2024-06-27 17:59:45,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:45,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041701938] [2024-06-27 17:59:45,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:45,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:46,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:46,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041701938] [2024-06-27 17:59:46,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041701938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:46,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:46,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:59:46,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529251651] [2024-06-27 17:59:46,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:46,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:59:46,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:46,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:59:46,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:59:46,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:59:46,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 259 transitions, 2903 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:46,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:46,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:59:46,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:49,257 INFO L124 PetriNetUnfolderBase]: 9180/14137 cut-off events. [2024-06-27 17:59:49,257 INFO L125 PetriNetUnfolderBase]: For 313900/313900 co-relation queries the response was YES. [2024-06-27 17:59:49,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81182 conditions, 14137 events. 9180/14137 cut-off events. For 313900/313900 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 88467 event pairs, 3426 based on Foata normal form. 8/13763 useless extension candidates. Maximal degree in co-relation 81102. Up to 12581 conditions per place. [2024-06-27 17:59:49,405 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 282 selfloop transitions, 35 changer transitions 0/324 dead transitions. [2024-06-27 17:59:49,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 324 transitions, 3945 flow [2024-06-27 17:59:49,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:59:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:59:49,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-27 17:59:49,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47392290249433106 [2024-06-27 17:59:49,411 INFO L175 Difference]: Start difference. First operand has 180 places, 259 transitions, 2903 flow. Second operand 9 states and 209 transitions. [2024-06-27 17:59:49,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 324 transitions, 3945 flow [2024-06-27 17:59:50,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 324 transitions, 3801 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 17:59:50,244 INFO L231 Difference]: Finished difference. Result has 184 places, 265 transitions, 2993 flow [2024-06-27 17:59:50,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2759, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2993, PETRI_PLACES=184, PETRI_TRANSITIONS=265} [2024-06-27 17:59:50,244 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 129 predicate places. [2024-06-27 17:59:50,245 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 265 transitions, 2993 flow [2024-06-27 17:59:50,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:50,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:50,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:50,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 17:59:50,245 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:50,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:50,246 INFO L85 PathProgramCache]: Analyzing trace with hash 110251138, now seen corresponding path program 1 times [2024-06-27 17:59:50,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:50,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386406386] [2024-06-27 17:59:50,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:50,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:50,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:50,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386406386] [2024-06-27 17:59:50,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386406386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:50,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:50,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:50,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818121365] [2024-06-27 17:59:50,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:50,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:50,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:50,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:50,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:50,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:59:50,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 265 transitions, 2993 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:50,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:50,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:59:50,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:53,038 INFO L124 PetriNetUnfolderBase]: 9180/14119 cut-off events. [2024-06-27 17:59:53,038 INFO L125 PetriNetUnfolderBase]: For 332097/332097 co-relation queries the response was YES. [2024-06-27 17:59:53,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82188 conditions, 14119 events. 9180/14119 cut-off events. For 332097/332097 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 88169 event pairs, 3535 based on Foata normal form. 3/13746 useless extension candidates. Maximal degree in co-relation 82106. Up to 12851 conditions per place. [2024-06-27 17:59:53,202 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 269 selfloop transitions, 23 changer transitions 0/299 dead transitions. [2024-06-27 17:59:53,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 299 transitions, 3860 flow [2024-06-27 17:59:53,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:59:53,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:59:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-27 17:59:53,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 17:59:53,204 INFO L175 Difference]: Start difference. First operand has 184 places, 265 transitions, 2993 flow. Second operand 6 states and 133 transitions. [2024-06-27 17:59:53,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 299 transitions, 3860 flow [2024-06-27 17:59:53,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 299 transitions, 3673 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-27 17:59:53,899 INFO L231 Difference]: Finished difference. Result has 185 places, 275 transitions, 3059 flow [2024-06-27 17:59:53,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2817, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3059, PETRI_PLACES=185, PETRI_TRANSITIONS=275} [2024-06-27 17:59:53,899 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 130 predicate places. [2024-06-27 17:59:53,900 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 275 transitions, 3059 flow [2024-06-27 17:59:53,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:53,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:53,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:53,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 17:59:53,900 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:53,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:53,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1632631848, now seen corresponding path program 1 times [2024-06-27 17:59:53,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:53,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299273829] [2024-06-27 17:59:53,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:53,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:54,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:54,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299273829] [2024-06-27 17:59:54,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299273829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:54,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:54,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:54,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582479662] [2024-06-27 17:59:54,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:54,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:54,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:54,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:54,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:54,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:59:54,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 275 transitions, 3059 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:54,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:54,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:59:54,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:56,613 INFO L124 PetriNetUnfolderBase]: 9356/14357 cut-off events. [2024-06-27 17:59:56,613 INFO L125 PetriNetUnfolderBase]: For 357718/357727 co-relation queries the response was YES. [2024-06-27 17:59:56,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85409 conditions, 14357 events. 9356/14357 cut-off events. For 357718/357727 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 89338 event pairs, 3294 based on Foata normal form. 12/13991 useless extension candidates. Maximal degree in co-relation 85325. Up to 12717 conditions per place. [2024-06-27 17:59:56,792 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 275 selfloop transitions, 46 changer transitions 0/328 dead transitions. [2024-06-27 17:59:56,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 328 transitions, 4306 flow [2024-06-27 17:59:56,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:59:56,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:59:56,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-27 17:59:56,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46355685131195334 [2024-06-27 17:59:56,794 INFO L175 Difference]: Start difference. First operand has 185 places, 275 transitions, 3059 flow. Second operand 7 states and 159 transitions. [2024-06-27 17:59:56,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 328 transitions, 4306 flow [2024-06-27 17:59:57,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 328 transitions, 4150 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-27 17:59:57,425 INFO L231 Difference]: Finished difference. Result has 190 places, 288 transitions, 3343 flow [2024-06-27 17:59:57,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2962, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3343, PETRI_PLACES=190, PETRI_TRANSITIONS=288} [2024-06-27 17:59:57,426 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 135 predicate places. [2024-06-27 17:59:57,426 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 288 transitions, 3343 flow [2024-06-27 17:59:57,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:57,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:57,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:57,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 17:59:57,427 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:57,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:57,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1837531288, now seen corresponding path program 2 times [2024-06-27 17:59:57,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:57,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012188255] [2024-06-27 17:59:57,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:57,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:57,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:57,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:57,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012188255] [2024-06-27 17:59:57,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012188255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:57,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:57,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:57,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468724477] [2024-06-27 17:59:57,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:57,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:57,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:57,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:57,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:58,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 17:59:58,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 288 transitions, 3343 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:58,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:58,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 17:59:58,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:00,445 INFO L124 PetriNetUnfolderBase]: 9533/14485 cut-off events. [2024-06-27 18:00:00,445 INFO L125 PetriNetUnfolderBase]: For 390586/390588 co-relation queries the response was YES. [2024-06-27 18:00:00,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89922 conditions, 14485 events. 9533/14485 cut-off events. For 390586/390588 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 89847 event pairs, 3586 based on Foata normal form. 6/14153 useless extension candidates. Maximal degree in co-relation 89836. Up to 13184 conditions per place. [2024-06-27 18:00:00,600 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 298 selfloop transitions, 42 changer transitions 0/347 dead transitions. [2024-06-27 18:00:00,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 347 transitions, 4742 flow [2024-06-27 18:00:00,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:00:00,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:00:00,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 18:00:00,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461734693877551 [2024-06-27 18:00:00,602 INFO L175 Difference]: Start difference. First operand has 190 places, 288 transitions, 3343 flow. Second operand 8 states and 181 transitions. [2024-06-27 18:00:00,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 347 transitions, 4742 flow [2024-06-27 18:00:01,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 347 transitions, 4452 flow, removed 125 selfloop flow, removed 3 redundant places. [2024-06-27 18:00:01,274 INFO L231 Difference]: Finished difference. Result has 196 places, 307 transitions, 3628 flow [2024-06-27 18:00:01,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3159, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3628, PETRI_PLACES=196, PETRI_TRANSITIONS=307} [2024-06-27 18:00:01,288 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 141 predicate places. [2024-06-27 18:00:01,288 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 307 transitions, 3628 flow [2024-06-27 18:00:01,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:01,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:01,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:01,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 18:00:01,289 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:00:01,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:01,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1837542200, now seen corresponding path program 1 times [2024-06-27 18:00:01,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:01,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642036300] [2024-06-27 18:00:01,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:01,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:02,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:02,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642036300] [2024-06-27 18:00:02,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642036300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:02,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:02,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:00:02,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900344607] [2024-06-27 18:00:02,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:02,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:00:02,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:02,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:00:02,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:00:02,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2024-06-27 18:00:02,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 307 transitions, 3628 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:02,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:02,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2024-06-27 18:00:02,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:04,834 INFO L124 PetriNetUnfolderBase]: 9096/14189 cut-off events. [2024-06-27 18:00:04,834 INFO L125 PetriNetUnfolderBase]: For 415676/415775 co-relation queries the response was YES. [2024-06-27 18:00:05,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88798 conditions, 14189 events. 9096/14189 cut-off events. For 415676/415775 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 91435 event pairs, 2803 based on Foata normal form. 27/13753 useless extension candidates. Maximal degree in co-relation 88709. Up to 12131 conditions per place. [2024-06-27 18:00:05,105 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 256 selfloop transitions, 75 changer transitions 0/355 dead transitions. [2024-06-27 18:00:05,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 355 transitions, 4660 flow [2024-06-27 18:00:05,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:00:05,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:00:05,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 18:00:05,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 18:00:05,107 INFO L175 Difference]: Start difference. First operand has 196 places, 307 transitions, 3628 flow. Second operand 8 states and 189 transitions. [2024-06-27 18:00:05,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 355 transitions, 4660 flow [2024-06-27 18:00:06,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 355 transitions, 4501 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-06-27 18:00:06,279 INFO L231 Difference]: Finished difference. Result has 200 places, 312 transitions, 3749 flow [2024-06-27 18:00:06,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3469, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3749, PETRI_PLACES=200, PETRI_TRANSITIONS=312} [2024-06-27 18:00:06,286 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 145 predicate places. [2024-06-27 18:00:06,287 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 312 transitions, 3749 flow [2024-06-27 18:00:06,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:06,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:06,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:06,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 18:00:06,288 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:00:06,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:06,289 INFO L85 PathProgramCache]: Analyzing trace with hash 588124400, now seen corresponding path program 1 times [2024-06-27 18:00:06,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:06,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540418631] [2024-06-27 18:00:06,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:06,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:06,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:06,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540418631] [2024-06-27 18:00:06,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540418631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:06,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:06,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:06,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385868670] [2024-06-27 18:00:06,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:06,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:06,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:06,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:06,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:06,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 18:00:06,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 312 transitions, 3749 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:06,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:06,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 18:00:06,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:10,500 INFO L124 PetriNetUnfolderBase]: 9702/14829 cut-off events. [2024-06-27 18:00:10,501 INFO L125 PetriNetUnfolderBase]: For 446522/446530 co-relation queries the response was YES. [2024-06-27 18:00:10,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95613 conditions, 14829 events. 9702/14829 cut-off events. For 446522/446530 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 92247 event pairs, 3457 based on Foata normal form. 10/14462 useless extension candidates. Maximal degree in co-relation 95522. Up to 13350 conditions per place. [2024-06-27 18:00:10,876 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 303 selfloop transitions, 53 changer transitions 0/363 dead transitions. [2024-06-27 18:00:10,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 363 transitions, 4808 flow [2024-06-27 18:00:10,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:00:10,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:00:10,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 18:00:10,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-27 18:00:10,878 INFO L175 Difference]: Start difference. First operand has 200 places, 312 transitions, 3749 flow. Second operand 7 states and 161 transitions. [2024-06-27 18:00:10,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 363 transitions, 4808 flow [2024-06-27 18:00:11,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 363 transitions, 4574 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 18:00:11,998 INFO L231 Difference]: Finished difference. Result has 203 places, 327 transitions, 3852 flow [2024-06-27 18:00:11,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3515, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3852, PETRI_PLACES=203, PETRI_TRANSITIONS=327} [2024-06-27 18:00:11,999 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 148 predicate places. [2024-06-27 18:00:11,999 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 327 transitions, 3852 flow [2024-06-27 18:00:12,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:12,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:12,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:12,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 18:00:12,000 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:00:12,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:12,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1248976892, now seen corresponding path program 2 times [2024-06-27 18:00:12,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:12,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988637767] [2024-06-27 18:00:12,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:12,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:12,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:12,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988637767] [2024-06-27 18:00:12,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988637767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:12,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:12,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:12,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499507928] [2024-06-27 18:00:12,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:12,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:12,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:12,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:12,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:12,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 18:00:12,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 327 transitions, 3852 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:12,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:12,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 18:00:12,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:16,335 INFO L124 PetriNetUnfolderBase]: 9834/15038 cut-off events. [2024-06-27 18:00:16,336 INFO L125 PetriNetUnfolderBase]: For 470280/470288 co-relation queries the response was YES. [2024-06-27 18:00:16,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100133 conditions, 15038 events. 9834/15038 cut-off events. For 470280/470288 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 93840 event pairs, 3449 based on Foata normal form. 10/14660 useless extension candidates. Maximal degree in co-relation 100039. Up to 13381 conditions per place. [2024-06-27 18:00:16,758 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 306 selfloop transitions, 66 changer transitions 0/379 dead transitions. [2024-06-27 18:00:16,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 379 transitions, 5197 flow [2024-06-27 18:00:16,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:00:16,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:00:16,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-27 18:00:16,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47230320699708456 [2024-06-27 18:00:16,760 INFO L175 Difference]: Start difference. First operand has 203 places, 327 transitions, 3852 flow. Second operand 7 states and 162 transitions. [2024-06-27 18:00:16,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 379 transitions, 5197 flow [2024-06-27 18:00:18,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 379 transitions, 5089 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-27 18:00:18,013 INFO L231 Difference]: Finished difference. Result has 209 places, 342 transitions, 4236 flow [2024-06-27 18:00:18,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3744, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4236, PETRI_PLACES=209, PETRI_TRANSITIONS=342} [2024-06-27 18:00:18,014 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 154 predicate places. [2024-06-27 18:00:18,014 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 342 transitions, 4236 flow [2024-06-27 18:00:18,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:18,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:18,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:18,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 18:00:18,019 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:00:18,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:18,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1661714172, now seen corresponding path program 3 times [2024-06-27 18:00:18,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:18,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574577808] [2024-06-27 18:00:18,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:18,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:18,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:18,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574577808] [2024-06-27 18:00:18,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574577808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:18,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:18,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:18,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555345092] [2024-06-27 18:00:18,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:18,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:18,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:18,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:18,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:18,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 18:00:18,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 342 transitions, 4236 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:18,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:18,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 18:00:18,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:22,758 INFO L124 PetriNetUnfolderBase]: 9822/15014 cut-off events. [2024-06-27 18:00:22,759 INFO L125 PetriNetUnfolderBase]: For 493225/493234 co-relation queries the response was YES. [2024-06-27 18:00:22,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101847 conditions, 15014 events. 9822/15014 cut-off events. For 493225/493234 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 93551 event pairs, 3425 based on Foata normal form. 10/14637 useless extension candidates. Maximal degree in co-relation 101750. Up to 13505 conditions per place. [2024-06-27 18:00:22,922 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 323 selfloop transitions, 48 changer transitions 0/378 dead transitions. [2024-06-27 18:00:22,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 378 transitions, 5192 flow [2024-06-27 18:00:22,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:00:22,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:00:22,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-27 18:00:22,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4606413994169096 [2024-06-27 18:00:22,925 INFO L175 Difference]: Start difference. First operand has 209 places, 342 transitions, 4236 flow. Second operand 7 states and 158 transitions. [2024-06-27 18:00:22,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 378 transitions, 5192 flow [2024-06-27 18:00:23,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 378 transitions, 4945 flow, removed 92 selfloop flow, removed 3 redundant places. [2024-06-27 18:00:23,761 INFO L231 Difference]: Finished difference. Result has 213 places, 342 transitions, 4104 flow [2024-06-27 18:00:23,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4001, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4104, PETRI_PLACES=213, PETRI_TRANSITIONS=342} [2024-06-27 18:00:23,762 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 158 predicate places. [2024-06-27 18:00:23,762 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 342 transitions, 4104 flow [2024-06-27 18:00:23,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:23,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:23,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:23,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 18:00:23,763 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:00:23,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:23,763 INFO L85 PathProgramCache]: Analyzing trace with hash -872518426, now seen corresponding path program 4 times [2024-06-27 18:00:23,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:23,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177021408] [2024-06-27 18:00:23,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:23,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:24,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:24,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177021408] [2024-06-27 18:00:24,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177021408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:24,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:24,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:24,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148129247] [2024-06-27 18:00:24,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:24,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:24,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:24,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:24,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:24,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 18:00:24,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 342 transitions, 4104 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:24,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:24,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 18:00:24,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:28,106 INFO L124 PetriNetUnfolderBase]: 9925/15106 cut-off events. [2024-06-27 18:00:28,107 INFO L125 PetriNetUnfolderBase]: For 503137/503146 co-relation queries the response was YES. [2024-06-27 18:00:28,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101757 conditions, 15106 events. 9925/15106 cut-off events. For 503137/503146 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 93588 event pairs, 3372 based on Foata normal form. 14/14748 useless extension candidates. Maximal degree in co-relation 101658. Up to 13255 conditions per place. [2024-06-27 18:00:28,582 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 314 selfloop transitions, 69 changer transitions 0/390 dead transitions. [2024-06-27 18:00:28,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 390 transitions, 5418 flow [2024-06-27 18:00:28,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:00:28,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:00:28,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 18:00:28,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46647230320699706 [2024-06-27 18:00:28,594 INFO L175 Difference]: Start difference. First operand has 213 places, 342 transitions, 4104 flow. Second operand 7 states and 160 transitions. [2024-06-27 18:00:28,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 390 transitions, 5418 flow [2024-06-27 18:00:29,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 390 transitions, 5320 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 18:00:29,617 INFO L231 Difference]: Finished difference. Result has 216 places, 353 transitions, 4450 flow [2024-06-27 18:00:29,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4006, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4450, PETRI_PLACES=216, PETRI_TRANSITIONS=353} [2024-06-27 18:00:29,618 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 161 predicate places. [2024-06-27 18:00:29,618 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 353 transitions, 4450 flow [2024-06-27 18:00:29,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:29,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:29,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:29,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 18:00:29,619 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:00:29,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:29,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1205367134, now seen corresponding path program 5 times [2024-06-27 18:00:29,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:29,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366099636] [2024-06-27 18:00:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:29,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:30,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:30,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:30,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366099636] [2024-06-27 18:00:30,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366099636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:30,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:30,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:30,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228080649] [2024-06-27 18:00:30,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:30,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:30,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:30,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:30,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:30,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 18:00:30,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 353 transitions, 4450 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:30,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:30,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 18:00:30,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:33,446 INFO L124 PetriNetUnfolderBase]: 10045/15176 cut-off events. [2024-06-27 18:00:33,447 INFO L125 PetriNetUnfolderBase]: For 536708/536719 co-relation queries the response was YES. [2024-06-27 18:00:33,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105614 conditions, 15176 events. 10045/15176 cut-off events. For 536708/536719 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 93769 event pairs, 3087 based on Foata normal form. 14/14850 useless extension candidates. Maximal degree in co-relation 105514. Up to 12865 conditions per place. [2024-06-27 18:00:33,592 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 314 selfloop transitions, 99 changer transitions 0/420 dead transitions. [2024-06-27 18:00:33,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 420 transitions, 6181 flow [2024-06-27 18:00:33,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:00:33,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:00:33,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-27 18:00:33,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47230320699708456 [2024-06-27 18:00:33,602 INFO L175 Difference]: Start difference. First operand has 216 places, 353 transitions, 4450 flow. Second operand 7 states and 162 transitions. [2024-06-27 18:00:33,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 420 transitions, 6181 flow [2024-06-27 18:00:34,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 420 transitions, 5917 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-27 18:00:34,602 INFO L231 Difference]: Finished difference. Result has 221 places, 380 transitions, 4990 flow [2024-06-27 18:00:34,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4186, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4990, PETRI_PLACES=221, PETRI_TRANSITIONS=380} [2024-06-27 18:00:34,603 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 166 predicate places. [2024-06-27 18:00:34,603 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 380 transitions, 4990 flow [2024-06-27 18:00:34,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:34,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:34,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:34,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 18:00:34,603 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:00:34,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:34,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1205187644, now seen corresponding path program 6 times [2024-06-27 18:00:34,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:34,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044249492] [2024-06-27 18:00:34,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:34,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:35,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:35,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:35,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044249492] [2024-06-27 18:00:35,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044249492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:35,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:35,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:35,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823351009] [2024-06-27 18:00:35,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:35,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:35,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:35,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:35,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:35,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 18:00:35,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 380 transitions, 4990 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:35,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:35,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 18:00:35,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:38,654 INFO L124 PetriNetUnfolderBase]: 10135/15296 cut-off events. [2024-06-27 18:00:38,655 INFO L125 PetriNetUnfolderBase]: For 573139/573150 co-relation queries the response was YES. [2024-06-27 18:00:38,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109501 conditions, 15296 events. 10135/15296 cut-off events. For 573139/573150 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 94518 event pairs, 3091 based on Foata normal form. 14/14970 useless extension candidates. Maximal degree in co-relation 109398. Up to 12928 conditions per place. [2024-06-27 18:00:38,900 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 309 selfloop transitions, 109 changer transitions 0/425 dead transitions. [2024-06-27 18:00:38,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 425 transitions, 6355 flow [2024-06-27 18:00:38,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:00:38,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:00:38,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 18:00:38,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-27 18:00:38,902 INFO L175 Difference]: Start difference. First operand has 221 places, 380 transitions, 4990 flow. Second operand 7 states and 161 transitions. [2024-06-27 18:00:38,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 425 transitions, 6355 flow [2024-06-27 18:00:40,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 425 transitions, 6086 flow, removed 118 selfloop flow, removed 2 redundant places. [2024-06-27 18:00:40,616 INFO L231 Difference]: Finished difference. Result has 227 places, 387 transitions, 5171 flow [2024-06-27 18:00:40,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4765, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5171, PETRI_PLACES=227, PETRI_TRANSITIONS=387} [2024-06-27 18:00:40,617 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 172 predicate places. [2024-06-27 18:00:40,618 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 387 transitions, 5171 flow [2024-06-27 18:00:40,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:40,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:40,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:40,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 18:00:40,618 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:00:40,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:40,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1220852254, now seen corresponding path program 1 times [2024-06-27 18:00:40,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:40,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167688729] [2024-06-27 18:00:40,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:40,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:41,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:41,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167688729] [2024-06-27 18:00:41,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167688729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:41,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:41,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:00:41,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111100031] [2024-06-27 18:00:41,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:41,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:00:41,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:41,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:00:41,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:00:41,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2024-06-27 18:00:41,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 387 transitions, 5171 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:41,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:41,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2024-06-27 18:00:41,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:45,246 INFO L124 PetriNetUnfolderBase]: 9889/15169 cut-off events. [2024-06-27 18:00:45,247 INFO L125 PetriNetUnfolderBase]: For 564792/564846 co-relation queries the response was YES. [2024-06-27 18:00:45,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107573 conditions, 15169 events. 9889/15169 cut-off events. For 564792/564846 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 96394 event pairs, 2757 based on Foata normal form. 28/14796 useless extension candidates. Maximal degree in co-relation 107467. Up to 12734 conditions per place. [2024-06-27 18:00:45,551 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 312 selfloop transitions, 99 changer transitions 0/446 dead transitions. [2024-06-27 18:00:45,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 446 transitions, 6759 flow [2024-06-27 18:00:45,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:00:45,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:00:45,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 18:00:45,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4923469387755102 [2024-06-27 18:00:45,553 INFO L175 Difference]: Start difference. First operand has 227 places, 387 transitions, 5171 flow. Second operand 8 states and 193 transitions. [2024-06-27 18:00:45,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 446 transitions, 6759 flow [2024-06-27 18:00:47,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 446 transitions, 6539 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-27 18:00:47,255 INFO L231 Difference]: Finished difference. Result has 234 places, 399 transitions, 5403 flow [2024-06-27 18:00:47,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4951, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5403, PETRI_PLACES=234, PETRI_TRANSITIONS=399} [2024-06-27 18:00:47,255 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 179 predicate places. [2024-06-27 18:00:47,256 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 399 transitions, 5403 flow [2024-06-27 18:00:47,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:47,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:47,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:47,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 18:00:47,263 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:00:47,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:47,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1129216874, now seen corresponding path program 2 times [2024-06-27 18:00:47,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:47,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007473822] [2024-06-27 18:00:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:47,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:48,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:48,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007473822] [2024-06-27 18:00:48,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007473822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:48,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:48,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:00:48,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840170968] [2024-06-27 18:00:48,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:48,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:00:48,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:48,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:00:48,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:00:48,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2024-06-27 18:00:48,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 399 transitions, 5403 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:48,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:48,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2024-06-27 18:00:48,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:53,247 INFO L124 PetriNetUnfolderBase]: 9997/15279 cut-off events. [2024-06-27 18:00:53,248 INFO L125 PetriNetUnfolderBase]: For 595026/595079 co-relation queries the response was YES. [2024-06-27 18:00:53,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111074 conditions, 15279 events. 9997/15279 cut-off events. For 595026/595079 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 96831 event pairs, 3550 based on Foata normal form. 29/14929 useless extension candidates. Maximal degree in co-relation 110965. Up to 13660 conditions per place. [2024-06-27 18:00:53,545 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 388 selfloop transitions, 36 changer transitions 0/459 dead transitions. [2024-06-27 18:00:53,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 459 transitions, 6971 flow [2024-06-27 18:00:53,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:00:53,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:00:53,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-27 18:00:53,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-27 18:00:53,547 INFO L175 Difference]: Start difference. First operand has 234 places, 399 transitions, 5403 flow. Second operand 9 states and 198 transitions. [2024-06-27 18:00:53,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 459 transitions, 6971 flow