./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe001_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe001_tso.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/safe001_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe001_tso.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 [2024-06-28 00:52:36,759 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:52:36,857 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:52:36,863 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:52:36,864 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:52:36,894 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:52:36,897 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:52:36,898 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:52:36,899 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:52:36,903 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:52:36,903 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:52:36,903 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:52:36,904 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:52:36,906 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:52:36,906 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:52:36,906 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:52:36,906 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:52:36,907 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:52:36,907 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:52:36,907 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:52:36,908 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:52:36,908 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:52:36,908 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:52:36,909 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:52:36,909 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:52:36,909 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:52:36,910 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:52:36,910 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:52:36,911 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:52:36,911 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:52:36,912 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:52:36,912 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:52:36,912 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:52:36,913 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:52:36,913 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:52:36,913 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:52:36,913 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:52:36,914 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:52:36,914 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:52:36,914 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:52:36,914 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:52:36,915 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:52:36,915 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:52:36,915 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 00:52:37,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:52:37,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:52:37,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:52:37,232 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:52:37,233 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:52:37,234 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe001_tso.i [2024-06-28 00:52:38,478 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:52:38,727 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:52:38,728 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe001_tso.i [2024-06-28 00:52:38,740 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dd03b386/031be92e872445f99941180b93bdaa4e/FLAGadf8fa3ea [2024-06-28 00:52:38,752 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dd03b386/031be92e872445f99941180b93bdaa4e [2024-06-28 00:52:38,754 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:52:38,755 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:52:38,755 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe001_tso.yml/witness.yml [2024-06-28 00:52:38,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:52:38,883 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:52:38,884 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:52:38,884 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:52:38,889 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:52:38,889 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:52:38" (1/2) ... [2024-06-28 00:52:38,891 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@399ba10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:52:38, skipping insertion in model container [2024-06-28 00:52:38,891 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:52:38" (1/2) ... [2024-06-28 00:52:38,893 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@d96b937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:52:38, skipping insertion in model container [2024-06-28 00:52:38,893 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:52:38" (2/2) ... [2024-06-28 00:52:38,894 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@399ba10 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:38, skipping insertion in model container [2024-06-28 00:52:38,894 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:52:38" (2/2) ... [2024-06-28 00:52:38,894 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:52:38,944 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:52:38,945 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-28 00:52:38,945 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-28 00:52:38,945 INFO L97 edCorrectnessWitness]: Location invariant before [L782-L782] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-28 00:52:38,946 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:52:38,946 INFO L106 edCorrectnessWitness]: ghost_update [L777-L777] multithreaded = 1; [2024-06-28 00:52:38,995 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:52:39,199 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/safe001_tso.i[945,958] [2024-06-28 00:52:39,402 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:52:39,414 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-28 00:52:39,459 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/safe001_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:52:39,560 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:52:39,605 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:52:39,606 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:39 WrapperNode [2024-06-28 00:52:39,606 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:52:39,608 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:52:39,608 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:52:39,608 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:52:39,614 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:39" (1/1) ... [2024-06-28 00:52:39,634 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:39" (1/1) ... [2024-06-28 00:52:39,663 INFO L138 Inliner]: procedures = 175, calls = 41, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2024-06-28 00:52:39,664 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:52:39,664 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:52:39,665 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:52:39,665 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:52:39,680 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:39" (1/1) ... [2024-06-28 00:52:39,680 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:39" (1/1) ... [2024-06-28 00:52:39,683 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:39" (1/1) ... [2024-06-28 00:52:39,696 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]. [2024-06-28 00:52:39,697 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:39" (1/1) ... [2024-06-28 00:52:39,697 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:39" (1/1) ... [2024-06-28 00:52:39,703 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:39" (1/1) ... [2024-06-28 00:52:39,705 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:39" (1/1) ... [2024-06-28 00:52:39,712 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:39" (1/1) ... [2024-06-28 00:52:39,713 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:39" (1/1) ... [2024-06-28 00:52:39,716 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:52:39,717 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:52:39,717 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:52:39,717 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:52:39,718 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:39" (1/1) ... [2024-06-28 00:52:39,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:52:39,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:52:39,790 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 00:52:39,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 00:52:39,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:52:39,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:52:39,861 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 00:52:39,861 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 00:52:39,861 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 00:52:39,861 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 00:52:39,861 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 00:52:39,861 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 00:52:39,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:52:39,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:52:39,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:52:39,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:52:39,866 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:52:39,978 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:52:39,980 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:52:40,219 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:52:40,219 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:52:40,299 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:52:40,300 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 00:52:40,300 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:52:40 BoogieIcfgContainer [2024-06-28 00:52:40,300 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:52:40,302 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:52:40,302 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:52:40,306 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:52:40,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:52:38" (1/4) ... [2024-06-28 00:52:40,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b79334c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:52:40, skipping insertion in model container [2024-06-28 00:52:40,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:52:38" (2/4) ... [2024-06-28 00:52:40,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b79334c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:52:40, skipping insertion in model container [2024-06-28 00:52:40,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:39" (3/4) ... [2024-06-28 00:52:40,308 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b79334c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:52:40, skipping insertion in model container [2024-06-28 00:52:40,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:52:40" (4/4) ... [2024-06-28 00:52:40,309 INFO L112 eAbstractionObserver]: Analyzing ICFG safe001_tso.i [2024-06-28 00:52:40,325 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:52:40,326 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 00:52:40,326 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:52:40,378 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 00:52:40,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 45 transitions, 102 flow [2024-06-28 00:52:40,463 INFO L124 PetriNetUnfolderBase]: 1/42 cut-off events. [2024-06-28 00:52:40,464 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:52:40,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 42 events. 1/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-06-28 00:52:40,467 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 45 transitions, 102 flow [2024-06-28 00:52:40,472 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 39 transitions, 87 flow [2024-06-28 00:52:40,479 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:52:40,485 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;@1aab40d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:52:40,486 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-28 00:52:40,489 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:52:40,489 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 00:52:40,489 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:52:40,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:40,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:52:40,491 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:40,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:40,496 INFO L85 PathProgramCache]: Analyzing trace with hash 209194482, now seen corresponding path program 1 times [2024-06-28 00:52:40,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:40,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569028883] [2024-06-28 00:52:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:40,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:40,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:40,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:40,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569028883] [2024-06-28 00:52:40,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569028883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:40,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:40,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:52:40,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333214873] [2024-06-28 00:52:40,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:40,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:52:40,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:40,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:52:40,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:52:40,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-28 00:52:40,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:40,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:40,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-28 00:52:40,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:41,287 INFO L124 PetriNetUnfolderBase]: 971/1700 cut-off events. [2024-06-28 00:52:41,288 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-28 00:52:41,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3220 conditions, 1700 events. 971/1700 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9663 event pairs, 694 based on Foata normal form. 1/1638 useless extension candidates. Maximal degree in co-relation 3208. Up to 1455 conditions per place. [2024-06-28 00:52:41,308 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 32 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2024-06-28 00:52:41,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 51 transitions, 189 flow [2024-06-28 00:52:41,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:52:41,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:52:41,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-28 00:52:41,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2024-06-28 00:52:41,323 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 87 flow. Second operand 3 states and 96 transitions. [2024-06-28 00:52:41,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 51 transitions, 189 flow [2024-06-28 00:52:41,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 184 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:52:41,332 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 114 flow [2024-06-28 00:52:41,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-28 00:52:41,337 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-06-28 00:52:41,338 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 114 flow [2024-06-28 00:52:41,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:41,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:41,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:41,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:52:41,340 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:41,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:41,342 INFO L85 PathProgramCache]: Analyzing trace with hash 122035495, now seen corresponding path program 1 times [2024-06-28 00:52:41,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:41,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366380116] [2024-06-28 00:52:41,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:41,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:41,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:41,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366380116] [2024-06-28 00:52:41,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366380116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:41,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:41,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:41,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639209680] [2024-06-28 00:52:41,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:41,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:41,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:41,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:41,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:41,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:52:41,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 114 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:41,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:41,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:52:41,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:41,911 INFO L124 PetriNetUnfolderBase]: 1254/2103 cut-off events. [2024-06-28 00:52:41,911 INFO L125 PetriNetUnfolderBase]: For 357/398 co-relation queries the response was YES. [2024-06-28 00:52:41,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4562 conditions, 2103 events. 1254/2103 cut-off events. For 357/398 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11994 event pairs, 412 based on Foata normal form. 9/2098 useless extension candidates. Maximal degree in co-relation 4550. Up to 1758 conditions per place. [2024-06-28 00:52:41,926 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 46 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2024-06-28 00:52:41,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 306 flow [2024-06-28 00:52:41,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:52:41,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:52:41,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-06-28 00:52:41,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2024-06-28 00:52:41,929 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 114 flow. Second operand 4 states and 130 transitions. [2024-06-28 00:52:41,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 306 flow [2024-06-28 00:52:41,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:52:41,932 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 186 flow [2024-06-28 00:52:41,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-06-28 00:52:41,933 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2024-06-28 00:52:41,933 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 186 flow [2024-06-28 00:52:41,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:41,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:41,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:41,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:52:41,934 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:41,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:41,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1312035494, now seen corresponding path program 1 times [2024-06-28 00:52:41,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:41,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303110231] [2024-06-28 00:52:41,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:41,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:42,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:42,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303110231] [2024-06-28 00:52:42,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303110231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:42,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:42,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:42,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127149367] [2024-06-28 00:52:42,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:42,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:52:42,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:42,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:52:42,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:52:42,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:52:42,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 186 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:42,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:42,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:52:42,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:42,405 INFO L124 PetriNetUnfolderBase]: 1276/2135 cut-off events. [2024-06-28 00:52:42,406 INFO L125 PetriNetUnfolderBase]: For 1330/1483 co-relation queries the response was YES. [2024-06-28 00:52:42,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5467 conditions, 2135 events. 1276/2135 cut-off events. For 1330/1483 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12129 event pairs, 262 based on Foata normal form. 28/2149 useless extension candidates. Maximal degree in co-relation 5452. Up to 1724 conditions per place. [2024-06-28 00:52:42,426 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 52 selfloop transitions, 14 changer transitions 0/80 dead transitions. [2024-06-28 00:52:42,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 80 transitions, 402 flow [2024-06-28 00:52:42,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:42,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:42,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-28 00:52:42,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6977777777777778 [2024-06-28 00:52:42,429 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 186 flow. Second operand 5 states and 157 transitions. [2024-06-28 00:52:42,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 80 transitions, 402 flow [2024-06-28 00:52:42,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 80 transitions, 398 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-28 00:52:42,455 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 234 flow [2024-06-28 00:52:42,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=234, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-28 00:52:42,456 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 8 predicate places. [2024-06-28 00:52:42,456 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 234 flow [2024-06-28 00:52:42,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:42,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:42,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:42,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:52:42,457 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:42,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:42,458 INFO L85 PathProgramCache]: Analyzing trace with hash -668200421, now seen corresponding path program 1 times [2024-06-28 00:52:42,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:42,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113439492] [2024-06-28 00:52:42,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:42,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:42,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:42,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:42,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113439492] [2024-06-28 00:52:42,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113439492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:42,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:42,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:52:42,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881201440] [2024-06-28 00:52:42,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:42,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:52:42,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:42,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:52:42,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:52:42,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-28 00:52:42,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 234 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:42,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:42,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-28 00:52:42,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:42,763 INFO L124 PetriNetUnfolderBase]: 990/1624 cut-off events. [2024-06-28 00:52:42,764 INFO L125 PetriNetUnfolderBase]: For 1900/1921 co-relation queries the response was YES. [2024-06-28 00:52:42,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4764 conditions, 1624 events. 990/1624 cut-off events. For 1900/1921 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8993 event pairs, 350 based on Foata normal form. 19/1635 useless extension candidates. Maximal degree in co-relation 4746. Up to 1424 conditions per place. [2024-06-28 00:52:42,778 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 41 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2024-06-28 00:52:42,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 67 transitions, 374 flow [2024-06-28 00:52:42,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:52:42,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:52:42,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-28 00:52:42,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2024-06-28 00:52:42,780 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 234 flow. Second operand 4 states and 125 transitions. [2024-06-28 00:52:42,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 67 transitions, 374 flow [2024-06-28 00:52:42,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 340 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 00:52:42,785 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 232 flow [2024-06-28 00:52:42,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2024-06-28 00:52:42,786 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2024-06-28 00:52:42,786 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 232 flow [2024-06-28 00:52:42,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:42,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:42,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:42,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:52:42,787 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:42,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:42,787 INFO L85 PathProgramCache]: Analyzing trace with hash 727382999, now seen corresponding path program 1 times [2024-06-28 00:52:42,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:42,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460249332] [2024-06-28 00:52:42,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:42,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:42,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:42,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460249332] [2024-06-28 00:52:42,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460249332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:42,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:42,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:42,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359041059] [2024-06-28 00:52:42,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:42,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:42,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:42,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:42,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:42,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:42,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 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) [2024-06-28 00:52:42,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:42,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:42,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:43,177 INFO L124 PetriNetUnfolderBase]: 1555/2531 cut-off events. [2024-06-28 00:52:43,178 INFO L125 PetriNetUnfolderBase]: For 2831/2831 co-relation queries the response was YES. [2024-06-28 00:52:43,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7106 conditions, 2531 events. 1555/2531 cut-off events. For 2831/2831 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14545 event pairs, 735 based on Foata normal form. 2/2526 useless extension candidates. Maximal degree in co-relation 7087. Up to 2267 conditions per place. [2024-06-28 00:52:43,200 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 59 selfloop transitions, 10 changer transitions 0/82 dead transitions. [2024-06-28 00:52:43,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 82 transitions, 449 flow [2024-06-28 00:52:43,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:43,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:43,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 142 transitions. [2024-06-28 00:52:43,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6311111111111111 [2024-06-28 00:52:43,202 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 232 flow. Second operand 5 states and 142 transitions. [2024-06-28 00:52:43,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 82 transitions, 449 flow [2024-06-28 00:52:43,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 82 transitions, 418 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 00:52:43,210 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 276 flow [2024-06-28 00:52:43,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=276, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-28 00:52:43,211 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 13 predicate places. [2024-06-28 00:52:43,211 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 276 flow [2024-06-28 00:52:43,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 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) [2024-06-28 00:52:43,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:43,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:43,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:52:43,212 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:43,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:43,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1071263434, now seen corresponding path program 1 times [2024-06-28 00:52:43,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:43,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192237939] [2024-06-28 00:52:43,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:43,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:43,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:43,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192237939] [2024-06-28 00:52:43,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192237939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:43,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:43,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:43,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522933921] [2024-06-28 00:52:43,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:43,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:52:43,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:43,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:52:43,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:52:43,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:43,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:43,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:43,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:43,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:43,740 INFO L124 PetriNetUnfolderBase]: 1823/2979 cut-off events. [2024-06-28 00:52:43,740 INFO L125 PetriNetUnfolderBase]: For 3943/3947 co-relation queries the response was YES. [2024-06-28 00:52:43,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8814 conditions, 2979 events. 1823/2979 cut-off events. For 3943/3947 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17736 event pairs, 413 based on Foata normal form. 11/2977 useless extension candidates. Maximal degree in co-relation 8793. Up to 2240 conditions per place. [2024-06-28 00:52:43,767 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 72 selfloop transitions, 35 changer transitions 0/120 dead transitions. [2024-06-28 00:52:43,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 120 transitions, 716 flow [2024-06-28 00:52:43,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:52:43,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:52:43,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-28 00:52:43,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6793650793650794 [2024-06-28 00:52:43,769 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 276 flow. Second operand 7 states and 214 transitions. [2024-06-28 00:52:43,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 120 transitions, 716 flow [2024-06-28 00:52:43,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 120 transitions, 716 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-28 00:52:43,778 INFO L231 Difference]: Finished difference. Result has 71 places, 80 transitions, 493 flow [2024-06-28 00:52:43,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=493, PETRI_PLACES=71, PETRI_TRANSITIONS=80} [2024-06-28 00:52:43,781 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 22 predicate places. [2024-06-28 00:52:43,781 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 80 transitions, 493 flow [2024-06-28 00:52:43,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:43,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:43,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:43,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:52:43,782 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:43,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:43,783 INFO L85 PathProgramCache]: Analyzing trace with hash -209885186, now seen corresponding path program 2 times [2024-06-28 00:52:43,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:43,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896831372] [2024-06-28 00:52:43,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:43,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:43,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:43,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:43,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896831372] [2024-06-28 00:52:43,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896831372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:43,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:43,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:43,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389864722] [2024-06-28 00:52:43,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:43,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:52:43,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:43,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:52:43,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:52:43,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:43,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 80 transitions, 493 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:43,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:43,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:43,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:44,309 INFO L124 PetriNetUnfolderBase]: 1818/3012 cut-off events. [2024-06-28 00:52:44,309 INFO L125 PetriNetUnfolderBase]: For 7922/7926 co-relation queries the response was YES. [2024-06-28 00:52:44,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11177 conditions, 3012 events. 1818/3012 cut-off events. For 7922/7926 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 18152 event pairs, 706 based on Foata normal form. 3/2970 useless extension candidates. Maximal degree in co-relation 11151. Up to 2468 conditions per place. [2024-06-28 00:52:44,335 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 88 selfloop transitions, 28 changer transitions 0/129 dead transitions. [2024-06-28 00:52:44,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 129 transitions, 978 flow [2024-06-28 00:52:44,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:52:44,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:52:44,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-28 00:52:44,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6592592592592592 [2024-06-28 00:52:44,337 INFO L175 Difference]: Start difference. First operand has 71 places, 80 transitions, 493 flow. Second operand 6 states and 178 transitions. [2024-06-28 00:52:44,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 129 transitions, 978 flow [2024-06-28 00:52:44,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 129 transitions, 921 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-28 00:52:44,360 INFO L231 Difference]: Finished difference. Result has 78 places, 98 transitions, 710 flow [2024-06-28 00:52:44,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=710, PETRI_PLACES=78, PETRI_TRANSITIONS=98} [2024-06-28 00:52:44,360 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 29 predicate places. [2024-06-28 00:52:44,361 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 98 transitions, 710 flow [2024-06-28 00:52:44,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:44,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:44,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:44,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:52:44,362 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:44,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:44,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1064588266, now seen corresponding path program 1 times [2024-06-28 00:52:44,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:44,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655776335] [2024-06-28 00:52:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:44,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:44,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:44,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655776335] [2024-06-28 00:52:44,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655776335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:44,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:44,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:44,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319268709] [2024-06-28 00:52:44,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:44,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:52:44,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:44,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:52:44,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:52:44,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:44,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 98 transitions, 710 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:44,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:44,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:44,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:44,924 INFO L124 PetriNetUnfolderBase]: 1810/2936 cut-off events. [2024-06-28 00:52:44,925 INFO L125 PetriNetUnfolderBase]: For 9852/9852 co-relation queries the response was YES. [2024-06-28 00:52:44,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11971 conditions, 2936 events. 1810/2936 cut-off events. For 9852/9852 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17221 event pairs, 687 based on Foata normal form. 4/2926 useless extension candidates. Maximal degree in co-relation 11940. Up to 2590 conditions per place. [2024-06-28 00:52:44,951 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 103 selfloop transitions, 12 changer transitions 0/128 dead transitions. [2024-06-28 00:52:44,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 128 transitions, 1026 flow [2024-06-28 00:52:44,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:52:44,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:52:44,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-28 00:52:44,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-28 00:52:44,956 INFO L175 Difference]: Start difference. First operand has 78 places, 98 transitions, 710 flow. Second operand 6 states and 168 transitions. [2024-06-28 00:52:44,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 128 transitions, 1026 flow [2024-06-28 00:52:44,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 128 transitions, 1000 flow, removed 13 selfloop flow, removed 0 redundant places. [2024-06-28 00:52:44,986 INFO L231 Difference]: Finished difference. Result has 84 places, 100 transitions, 739 flow [2024-06-28 00:52:44,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=739, PETRI_PLACES=84, PETRI_TRANSITIONS=100} [2024-06-28 00:52:44,989 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 35 predicate places. [2024-06-28 00:52:44,989 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 100 transitions, 739 flow [2024-06-28 00:52:44,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:44,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:44,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:44,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:52:44,990 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:44,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:44,991 INFO L85 PathProgramCache]: Analyzing trace with hash -612539526, now seen corresponding path program 1 times [2024-06-28 00:52:44,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:44,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616804670] [2024-06-28 00:52:44,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:44,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:45,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:45,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616804670] [2024-06-28 00:52:45,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616804670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:45,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:45,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:45,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584407166] [2024-06-28 00:52:45,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:45,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:52:45,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:45,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:52:45,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:52:45,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:45,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 100 transitions, 739 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 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) [2024-06-28 00:52:45,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:45,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:45,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:45,564 INFO L124 PetriNetUnfolderBase]: 1851/3021 cut-off events. [2024-06-28 00:52:45,564 INFO L125 PetriNetUnfolderBase]: For 11822/11829 co-relation queries the response was YES. [2024-06-28 00:52:45,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12607 conditions, 3021 events. 1851/3021 cut-off events. For 11822/11829 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17900 event pairs, 453 based on Foata normal form. 10/3013 useless extension candidates. Maximal degree in co-relation 12573. Up to 2262 conditions per place. [2024-06-28 00:52:45,591 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 89 selfloop transitions, 52 changer transitions 0/154 dead transitions. [2024-06-28 00:52:45,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 154 transitions, 1303 flow [2024-06-28 00:52:45,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:52:45,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:52:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-06-28 00:52:45,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.692063492063492 [2024-06-28 00:52:45,593 INFO L175 Difference]: Start difference. First operand has 84 places, 100 transitions, 739 flow. Second operand 7 states and 218 transitions. [2024-06-28 00:52:45,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 154 transitions, 1303 flow [2024-06-28 00:52:45,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 154 transitions, 1266 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 00:52:45,626 INFO L231 Difference]: Finished difference. Result has 89 places, 111 transitions, 965 flow [2024-06-28 00:52:45,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=965, PETRI_PLACES=89, PETRI_TRANSITIONS=111} [2024-06-28 00:52:45,627 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 40 predicate places. [2024-06-28 00:52:45,627 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 111 transitions, 965 flow [2024-06-28 00:52:45,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 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) [2024-06-28 00:52:45,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:45,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:45,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 00:52:45,630 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:45,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:45,630 INFO L85 PathProgramCache]: Analyzing trace with hash 999358784, now seen corresponding path program 2 times [2024-06-28 00:52:45,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:45,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201408136] [2024-06-28 00:52:45,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:45,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:45,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:45,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:45,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201408136] [2024-06-28 00:52:45,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201408136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:45,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:45,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:45,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728644982] [2024-06-28 00:52:45,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:45,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:52:45,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:45,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:52:45,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:52:45,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:45,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 111 transitions, 965 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 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) [2024-06-28 00:52:45,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:45,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:45,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:46,243 INFO L124 PetriNetUnfolderBase]: 1856/3033 cut-off events. [2024-06-28 00:52:46,243 INFO L125 PetriNetUnfolderBase]: For 14943/14950 co-relation queries the response was YES. [2024-06-28 00:52:46,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13733 conditions, 3033 events. 1856/3033 cut-off events. For 14943/14950 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18036 event pairs, 477 based on Foata normal form. 7/3023 useless extension candidates. Maximal degree in co-relation 13696. Up to 2270 conditions per place. [2024-06-28 00:52:46,274 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 79 selfloop transitions, 50 changer transitions 0/142 dead transitions. [2024-06-28 00:52:46,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 142 transitions, 1366 flow [2024-06-28 00:52:46,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:52:46,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:52:46,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-28 00:52:46,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 00:52:46,276 INFO L175 Difference]: Start difference. First operand has 89 places, 111 transitions, 965 flow. Second operand 6 states and 180 transitions. [2024-06-28 00:52:46,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 142 transitions, 1366 flow [2024-06-28 00:52:46,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 142 transitions, 1288 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-28 00:52:46,326 INFO L231 Difference]: Finished difference. Result has 92 places, 115 transitions, 1046 flow [2024-06-28 00:52:46,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1046, PETRI_PLACES=92, PETRI_TRANSITIONS=115} [2024-06-28 00:52:46,327 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 43 predicate places. [2024-06-28 00:52:46,327 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 115 transitions, 1046 flow [2024-06-28 00:52:46,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 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) [2024-06-28 00:52:46,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:46,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:46,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 00:52:46,328 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:46,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:46,329 INFO L85 PathProgramCache]: Analyzing trace with hash -497886558, now seen corresponding path program 3 times [2024-06-28 00:52:46,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:46,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421822394] [2024-06-28 00:52:46,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:46,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:46,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:46,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421822394] [2024-06-28 00:52:46,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421822394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:46,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:46,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:46,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937799093] [2024-06-28 00:52:46,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:46,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:52:46,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:46,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:52:46,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:52:46,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:46,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 115 transitions, 1046 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 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) [2024-06-28 00:52:46,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:46,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:46,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:46,871 INFO L124 PetriNetUnfolderBase]: 1851/3088 cut-off events. [2024-06-28 00:52:46,871 INFO L125 PetriNetUnfolderBase]: For 17098/17105 co-relation queries the response was YES. [2024-06-28 00:52:46,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14032 conditions, 3088 events. 1851/3088 cut-off events. For 17098/17105 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18722 event pairs, 718 based on Foata normal form. 5/3047 useless extension candidates. Maximal degree in co-relation 13994. Up to 2511 conditions per place. [2024-06-28 00:52:46,899 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 104 selfloop transitions, 28 changer transitions 0/145 dead transitions. [2024-06-28 00:52:46,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 145 transitions, 1403 flow [2024-06-28 00:52:46,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:52:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:52:46,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-28 00:52:46,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6407407407407407 [2024-06-28 00:52:46,901 INFO L175 Difference]: Start difference. First operand has 92 places, 115 transitions, 1046 flow. Second operand 6 states and 173 transitions. [2024-06-28 00:52:46,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 145 transitions, 1403 flow [2024-06-28 00:52:46,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 145 transitions, 1295 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-28 00:52:46,962 INFO L231 Difference]: Finished difference. Result has 96 places, 117 transitions, 1036 flow [2024-06-28 00:52:46,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=942, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1036, PETRI_PLACES=96, PETRI_TRANSITIONS=117} [2024-06-28 00:52:46,963 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 47 predicate places. [2024-06-28 00:52:46,963 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 117 transitions, 1036 flow [2024-06-28 00:52:46,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 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) [2024-06-28 00:52:46,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:46,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:46,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 00:52:46,964 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:46,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:46,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1907380493, now seen corresponding path program 1 times [2024-06-28 00:52:46,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:46,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891935208] [2024-06-28 00:52:46,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:46,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:47,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:47,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:47,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891935208] [2024-06-28 00:52:47,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891935208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:47,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:47,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:47,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552759398] [2024-06-28 00:52:47,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:47,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:47,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:47,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:47,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:47,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:47,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 117 transitions, 1036 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:47,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:47,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:47,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:47,484 INFO L124 PetriNetUnfolderBase]: 1845/2981 cut-off events. [2024-06-28 00:52:47,484 INFO L125 PetriNetUnfolderBase]: For 16459/16463 co-relation queries the response was YES. [2024-06-28 00:52:47,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13777 conditions, 2981 events. 1845/2981 cut-off events. For 16459/16463 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17453 event pairs, 438 based on Foata normal form. 6/2980 useless extension candidates. Maximal degree in co-relation 13737. Up to 2640 conditions per place. [2024-06-28 00:52:47,511 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 108 selfloop transitions, 10 changer transitions 0/131 dead transitions. [2024-06-28 00:52:47,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 131 transitions, 1324 flow [2024-06-28 00:52:47,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:52:47,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:52:47,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-06-28 00:52:47,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-28 00:52:47,513 INFO L175 Difference]: Start difference. First operand has 96 places, 117 transitions, 1036 flow. Second operand 4 states and 115 transitions. [2024-06-28 00:52:47,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 131 transitions, 1324 flow [2024-06-28 00:52:47,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 131 transitions, 1282 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-28 00:52:47,572 INFO L231 Difference]: Finished difference. Result has 98 places, 117 transitions, 1024 flow [2024-06-28 00:52:47,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1024, PETRI_PLACES=98, PETRI_TRANSITIONS=117} [2024-06-28 00:52:47,573 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 49 predicate places. [2024-06-28 00:52:47,573 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 117 transitions, 1024 flow [2024-06-28 00:52:47,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:47,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:47,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:47,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 00:52:47,574 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:47,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:47,575 INFO L85 PathProgramCache]: Analyzing trace with hash -969233195, now seen corresponding path program 1 times [2024-06-28 00:52:47,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:47,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704309651] [2024-06-28 00:52:47,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:47,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:47,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:47,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704309651] [2024-06-28 00:52:47,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704309651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:47,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:47,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:47,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089984566] [2024-06-28 00:52:47,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:47,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:52:47,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:47,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:52:47,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:52:47,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:52:47,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 117 transitions, 1024 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:47,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:47,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:52:47,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:48,159 INFO L124 PetriNetUnfolderBase]: 1792/2921 cut-off events. [2024-06-28 00:52:48,159 INFO L125 PetriNetUnfolderBase]: For 20660/20712 co-relation queries the response was YES. [2024-06-28 00:52:48,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13838 conditions, 2921 events. 1792/2921 cut-off events. For 20660/20712 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17306 event pairs, 265 based on Foata normal form. 27/2847 useless extension candidates. Maximal degree in co-relation 13796. Up to 2255 conditions per place. [2024-06-28 00:52:48,187 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 102 selfloop transitions, 20 changer transitions 0/147 dead transitions. [2024-06-28 00:52:48,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 147 transitions, 1432 flow [2024-06-28 00:52:48,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:48,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:48,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-06-28 00:52:48,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6755555555555556 [2024-06-28 00:52:48,189 INFO L175 Difference]: Start difference. First operand has 98 places, 117 transitions, 1024 flow. Second operand 5 states and 152 transitions. [2024-06-28 00:52:48,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 147 transitions, 1432 flow [2024-06-28 00:52:48,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 147 transitions, 1349 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 00:52:48,244 INFO L231 Difference]: Finished difference. Result has 99 places, 121 transitions, 1040 flow [2024-06-28 00:52:48,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1040, PETRI_PLACES=99, PETRI_TRANSITIONS=121} [2024-06-28 00:52:48,245 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 50 predicate places. [2024-06-28 00:52:48,245 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 121 transitions, 1040 flow [2024-06-28 00:52:48,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:48,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:48,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:48,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 00:52:48,246 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:48,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:48,247 INFO L85 PathProgramCache]: Analyzing trace with hash 634243579, now seen corresponding path program 2 times [2024-06-28 00:52:48,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:48,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697762750] [2024-06-28 00:52:48,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:48,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:48,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:48,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697762750] [2024-06-28 00:52:48,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697762750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:48,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:48,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:48,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697696343] [2024-06-28 00:52:48,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:48,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:52:48,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:48,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:52:48,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:52:48,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:52:48,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 121 transitions, 1040 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:48,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:48,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:52:48,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:48,784 INFO L124 PetriNetUnfolderBase]: 1764/2867 cut-off events. [2024-06-28 00:52:48,784 INFO L125 PetriNetUnfolderBase]: For 21860/21921 co-relation queries the response was YES. [2024-06-28 00:52:48,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13849 conditions, 2867 events. 1764/2867 cut-off events. For 21860/21921 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17024 event pairs, 348 based on Foata normal form. 17/2789 useless extension candidates. Maximal degree in co-relation 13806. Up to 2347 conditions per place. [2024-06-28 00:52:48,810 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 98 selfloop transitions, 22 changer transitions 0/145 dead transitions. [2024-06-28 00:52:48,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 145 transitions, 1356 flow [2024-06-28 00:52:48,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:48,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:48,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-28 00:52:48,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6711111111111111 [2024-06-28 00:52:48,813 INFO L175 Difference]: Start difference. First operand has 99 places, 121 transitions, 1040 flow. Second operand 5 states and 151 transitions. [2024-06-28 00:52:48,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 145 transitions, 1356 flow [2024-06-28 00:52:48,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 145 transitions, 1311 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-28 00:52:48,883 INFO L231 Difference]: Finished difference. Result has 103 places, 121 transitions, 1047 flow [2024-06-28 00:52:48,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1047, PETRI_PLACES=103, PETRI_TRANSITIONS=121} [2024-06-28 00:52:48,884 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 54 predicate places. [2024-06-28 00:52:48,884 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 121 transitions, 1047 flow [2024-06-28 00:52:48,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:48,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:48,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:48,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 00:52:48,885 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:48,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:48,886 INFO L85 PathProgramCache]: Analyzing trace with hash -109749729, now seen corresponding path program 1 times [2024-06-28 00:52:48,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:48,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956604487] [2024-06-28 00:52:48,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:48,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:49,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:49,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956604487] [2024-06-28 00:52:49,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956604487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:49,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:49,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:52:49,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096212012] [2024-06-28 00:52:49,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:49,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:52:49,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:49,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:52:49,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:52:49,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:49,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 121 transitions, 1047 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:49,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:49,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:49,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:49,624 INFO L124 PetriNetUnfolderBase]: 2449/3955 cut-off events. [2024-06-28 00:52:49,624 INFO L125 PetriNetUnfolderBase]: For 32362/32366 co-relation queries the response was YES. [2024-06-28 00:52:49,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17830 conditions, 3955 events. 2449/3955 cut-off events. For 32362/32366 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 24611 event pairs, 490 based on Foata normal form. 75/4018 useless extension candidates. Maximal degree in co-relation 17785. Up to 2408 conditions per place. [2024-06-28 00:52:49,661 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 94 selfloop transitions, 64 changer transitions 0/171 dead transitions. [2024-06-28 00:52:49,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 171 transitions, 1611 flow [2024-06-28 00:52:49,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:52:49,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:52:49,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 246 transitions. [2024-06-28 00:52:49,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-06-28 00:52:49,664 INFO L175 Difference]: Start difference. First operand has 103 places, 121 transitions, 1047 flow. Second operand 8 states and 246 transitions. [2024-06-28 00:52:49,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 171 transitions, 1611 flow [2024-06-28 00:52:49,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 171 transitions, 1558 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 00:52:49,736 INFO L231 Difference]: Finished difference. Result has 107 places, 125 transitions, 1200 flow [2024-06-28 00:52:49,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1200, PETRI_PLACES=107, PETRI_TRANSITIONS=125} [2024-06-28 00:52:49,738 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 58 predicate places. [2024-06-28 00:52:49,738 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 125 transitions, 1200 flow [2024-06-28 00:52:49,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:49,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:49,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:49,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 00:52:49,739 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:49,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:49,740 INFO L85 PathProgramCache]: Analyzing trace with hash 172092319, now seen corresponding path program 2 times [2024-06-28 00:52:49,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:49,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141543463] [2024-06-28 00:52:49,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:49,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:49,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:49,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:49,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141543463] [2024-06-28 00:52:49,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141543463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:49,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:49,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:52:49,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393374578] [2024-06-28 00:52:49,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:49,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:52:49,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:49,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:52:49,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:52:49,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:49,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 125 transitions, 1200 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:49,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:49,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:49,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:50,399 INFO L124 PetriNetUnfolderBase]: 2476/4071 cut-off events. [2024-06-28 00:52:50,399 INFO L125 PetriNetUnfolderBase]: For 30488/30492 co-relation queries the response was YES. [2024-06-28 00:52:50,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19330 conditions, 4071 events. 2476/4071 cut-off events. For 30488/30492 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 25838 event pairs, 934 based on Foata normal form. 5/4024 useless extension candidates. Maximal degree in co-relation 19284. Up to 3466 conditions per place. [2024-06-28 00:52:50,437 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 115 selfloop transitions, 34 changer transitions 0/162 dead transitions. [2024-06-28 00:52:50,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 162 transitions, 1615 flow [2024-06-28 00:52:50,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:52:50,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:52:50,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-28 00:52:50,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6412698412698413 [2024-06-28 00:52:50,439 INFO L175 Difference]: Start difference. First operand has 107 places, 125 transitions, 1200 flow. Second operand 7 states and 202 transitions. [2024-06-28 00:52:50,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 162 transitions, 1615 flow [2024-06-28 00:52:50,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 162 transitions, 1451 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-28 00:52:50,565 INFO L231 Difference]: Finished difference. Result has 108 places, 127 transitions, 1145 flow [2024-06-28 00:52:50,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1145, PETRI_PLACES=108, PETRI_TRANSITIONS=127} [2024-06-28 00:52:50,566 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 59 predicate places. [2024-06-28 00:52:50,566 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 127 transitions, 1145 flow [2024-06-28 00:52:50,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:50,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:50,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:50,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 00:52:50,567 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:50,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:50,568 INFO L85 PathProgramCache]: Analyzing trace with hash 172388989, now seen corresponding path program 3 times [2024-06-28 00:52:50,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:50,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584403087] [2024-06-28 00:52:50,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:50,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:50,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:50,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:50,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584403087] [2024-06-28 00:52:50,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584403087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:50,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:50,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:52:50,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813394796] [2024-06-28 00:52:50,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:50,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:52:50,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:50,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:52:50,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:52:50,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:50,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 127 transitions, 1145 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:50,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:50,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:50,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:51,167 INFO L124 PetriNetUnfolderBase]: 2468/3974 cut-off events. [2024-06-28 00:52:51,168 INFO L125 PetriNetUnfolderBase]: For 25938/25942 co-relation queries the response was YES. [2024-06-28 00:52:51,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17771 conditions, 3974 events. 2468/3974 cut-off events. For 25938/25942 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 24469 event pairs, 606 based on Foata normal form. 5/3956 useless extension candidates. Maximal degree in co-relation 17724. Up to 3237 conditions per place. [2024-06-28 00:52:51,201 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 117 selfloop transitions, 39 changer transitions 0/169 dead transitions. [2024-06-28 00:52:51,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 169 transitions, 1600 flow [2024-06-28 00:52:51,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:52:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:52:51,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-28 00:52:51,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2024-06-28 00:52:51,203 INFO L175 Difference]: Start difference. First operand has 108 places, 127 transitions, 1145 flow. Second operand 7 states and 206 transitions. [2024-06-28 00:52:51,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 169 transitions, 1600 flow [2024-06-28 00:52:51,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 169 transitions, 1511 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 00:52:51,291 INFO L231 Difference]: Finished difference. Result has 111 places, 130 transitions, 1193 flow [2024-06-28 00:52:51,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1193, PETRI_PLACES=111, PETRI_TRANSITIONS=130} [2024-06-28 00:52:51,292 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 62 predicate places. [2024-06-28 00:52:51,292 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 130 transitions, 1193 flow [2024-06-28 00:52:51,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:51,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:51,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:51,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 00:52:51,293 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:51,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:51,293 INFO L85 PathProgramCache]: Analyzing trace with hash 671204983, now seen corresponding path program 1 times [2024-06-28 00:52:51,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:51,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803839685] [2024-06-28 00:52:51,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:51,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:51,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:51,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803839685] [2024-06-28 00:52:51,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803839685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:51,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:51,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:52:51,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682588240] [2024-06-28 00:52:51,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:51,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:52:51,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:51,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:52:51,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:52:51,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:51,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 130 transitions, 1193 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:51,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:51,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:51,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:52,224 INFO L124 PetriNetUnfolderBase]: 4023/6602 cut-off events. [2024-06-28 00:52:52,224 INFO L125 PetriNetUnfolderBase]: For 61281/61288 co-relation queries the response was YES. [2024-06-28 00:52:52,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29373 conditions, 6602 events. 4023/6602 cut-off events. For 61281/61288 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 46616 event pairs, 646 based on Foata normal form. 57/6635 useless extension candidates. Maximal degree in co-relation 29324. Up to 2457 conditions per place. [2024-06-28 00:52:52,280 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 133 selfloop transitions, 61 changer transitions 0/207 dead transitions. [2024-06-28 00:52:52,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 207 transitions, 2137 flow [2024-06-28 00:52:52,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:52:52,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:52:52,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 232 transitions. [2024-06-28 00:52:52,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7365079365079366 [2024-06-28 00:52:52,282 INFO L175 Difference]: Start difference. First operand has 111 places, 130 transitions, 1193 flow. Second operand 7 states and 232 transitions. [2024-06-28 00:52:52,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 207 transitions, 2137 flow [2024-06-28 00:52:52,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 207 transitions, 2044 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-28 00:52:52,439 INFO L231 Difference]: Finished difference. Result has 116 places, 144 transitions, 1484 flow [2024-06-28 00:52:52,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1484, PETRI_PLACES=116, PETRI_TRANSITIONS=144} [2024-06-28 00:52:52,440 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 67 predicate places. [2024-06-28 00:52:52,440 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 144 transitions, 1484 flow [2024-06-28 00:52:52,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:52,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:52,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:52,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 00:52:52,441 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:52,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:52,442 INFO L85 PathProgramCache]: Analyzing trace with hash -958572963, now seen corresponding path program 2 times [2024-06-28 00:52:52,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:52,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940564316] [2024-06-28 00:52:52,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:52,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:52,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:52,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:52,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940564316] [2024-06-28 00:52:52,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940564316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:52,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:52,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:52:52,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753093812] [2024-06-28 00:52:52,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:52,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:52:52,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:52,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:52:52,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:52:52,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:52,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 144 transitions, 1484 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:52,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:52,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:52,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:53,687 INFO L124 PetriNetUnfolderBase]: 4735/7788 cut-off events. [2024-06-28 00:52:53,687 INFO L125 PetriNetUnfolderBase]: For 83671/83675 co-relation queries the response was YES. [2024-06-28 00:52:53,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36152 conditions, 7788 events. 4735/7788 cut-off events. For 83671/83675 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 57042 event pairs, 1213 based on Foata normal form. 55/7831 useless extension candidates. Maximal degree in co-relation 36100. Up to 4543 conditions per place. [2024-06-28 00:52:53,753 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 125 selfloop transitions, 71 changer transitions 0/209 dead transitions. [2024-06-28 00:52:53,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 209 transitions, 2304 flow [2024-06-28 00:52:53,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:52:53,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:52:53,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 256 transitions. [2024-06-28 00:52:53,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2024-06-28 00:52:53,756 INFO L175 Difference]: Start difference. First operand has 116 places, 144 transitions, 1484 flow. Second operand 8 states and 256 transitions. [2024-06-28 00:52:53,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 209 transitions, 2304 flow [2024-06-28 00:52:53,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 209 transitions, 2145 flow, removed 60 selfloop flow, removed 1 redundant places. [2024-06-28 00:52:54,001 INFO L231 Difference]: Finished difference. Result has 124 places, 153 transitions, 1675 flow [2024-06-28 00:52:54,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1675, PETRI_PLACES=124, PETRI_TRANSITIONS=153} [2024-06-28 00:52:54,002 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 75 predicate places. [2024-06-28 00:52:54,002 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 153 transitions, 1675 flow [2024-06-28 00:52:54,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:54,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:54,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:54,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 00:52:54,003 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:54,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:54,004 INFO L85 PathProgramCache]: Analyzing trace with hash -778306889, now seen corresponding path program 3 times [2024-06-28 00:52:54,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:54,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67031977] [2024-06-28 00:52:54,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:54,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:54,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:54,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67031977] [2024-06-28 00:52:54,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67031977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:54,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:54,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:52:54,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82227135] [2024-06-28 00:52:54,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:54,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:52:54,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:54,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:52:54,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:52:54,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:54,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 153 transitions, 1675 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:54,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:54,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:54,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:55,325 INFO L124 PetriNetUnfolderBase]: 5500/9107 cut-off events. [2024-06-28 00:52:55,325 INFO L125 PetriNetUnfolderBase]: For 101260/101267 co-relation queries the response was YES. [2024-06-28 00:52:55,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42238 conditions, 9107 events. 5500/9107 cut-off events. For 101260/101267 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 69379 event pairs, 1418 based on Foata normal form. 48/9135 useless extension candidates. Maximal degree in co-relation 42182. Up to 6450 conditions per place. [2024-06-28 00:52:55,386 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 146 selfloop transitions, 61 changer transitions 0/220 dead transitions. [2024-06-28 00:52:55,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 220 transitions, 2516 flow [2024-06-28 00:52:55,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:52:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:52:55,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 255 transitions. [2024-06-28 00:52:55,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-06-28 00:52:55,388 INFO L175 Difference]: Start difference. First operand has 124 places, 153 transitions, 1675 flow. Second operand 8 states and 255 transitions. [2024-06-28 00:52:55,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 220 transitions, 2516 flow [2024-06-28 00:52:55,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 220 transitions, 2329 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 00:52:55,627 INFO L231 Difference]: Finished difference. Result has 127 places, 159 transitions, 1738 flow [2024-06-28 00:52:55,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1488, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1738, PETRI_PLACES=127, PETRI_TRANSITIONS=159} [2024-06-28 00:52:55,628 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 78 predicate places. [2024-06-28 00:52:55,628 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 159 transitions, 1738 flow [2024-06-28 00:52:55,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:55,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:55,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:55,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 00:52:55,629 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:55,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:55,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1694232269, now seen corresponding path program 4 times [2024-06-28 00:52:55,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:55,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059325319] [2024-06-28 00:52:55,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:55,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:55,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:55,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:55,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059325319] [2024-06-28 00:52:55,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059325319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:55,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:55,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:52:55,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712908661] [2024-06-28 00:52:55,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:55,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:52:55,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:55,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:52:55,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:52:55,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:55,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 159 transitions, 1738 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:55,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:55,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:55,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:57,062 INFO L124 PetriNetUnfolderBase]: 5861/9740 cut-off events. [2024-06-28 00:52:57,062 INFO L125 PetriNetUnfolderBase]: For 107113/107120 co-relation queries the response was YES. [2024-06-28 00:52:57,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44331 conditions, 9740 events. 5861/9740 cut-off events. For 107113/107120 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 75470 event pairs, 2015 based on Foata normal form. 56/9778 useless extension candidates. Maximal degree in co-relation 44274. Up to 8012 conditions per place. [2024-06-28 00:52:57,124 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 141 selfloop transitions, 58 changer transitions 0/212 dead transitions. [2024-06-28 00:52:57,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 212 transitions, 2395 flow [2024-06-28 00:52:57,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:52:57,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:52:57,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 248 transitions. [2024-06-28 00:52:57,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-06-28 00:52:57,126 INFO L175 Difference]: Start difference. First operand has 127 places, 159 transitions, 1738 flow. Second operand 8 states and 248 transitions. [2024-06-28 00:52:57,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 212 transitions, 2395 flow [2024-06-28 00:52:57,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 212 transitions, 2283 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-28 00:52:57,454 INFO L231 Difference]: Finished difference. Result has 131 places, 161 transitions, 1801 flow [2024-06-28 00:52:57,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1628, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1801, PETRI_PLACES=131, PETRI_TRANSITIONS=161} [2024-06-28 00:52:57,455 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 82 predicate places. [2024-06-28 00:52:57,455 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 161 transitions, 1801 flow [2024-06-28 00:52:57,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:57,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:57,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:57,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 00:52:57,455 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:57,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:57,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1688869889, now seen corresponding path program 5 times [2024-06-28 00:52:57,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:57,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732023769] [2024-06-28 00:52:57,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:57,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:57,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:57,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732023769] [2024-06-28 00:52:57,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732023769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:57,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:57,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:52:57,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622100266] [2024-06-28 00:52:57,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:57,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:52:57,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:57,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:52:57,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:52:57,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:57,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 161 transitions, 1801 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:57,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:57,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:57,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:58,953 INFO L124 PetriNetUnfolderBase]: 6018/9981 cut-off events. [2024-06-28 00:52:58,954 INFO L125 PetriNetUnfolderBase]: For 110071/110078 co-relation queries the response was YES. [2024-06-28 00:52:58,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44841 conditions, 9981 events. 6018/9981 cut-off events. For 110071/110078 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 77789 event pairs, 2078 based on Foata normal form. 53/10017 useless extension candidates. Maximal degree in co-relation 44782. Up to 8275 conditions per place. [2024-06-28 00:52:59,028 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 134 selfloop transitions, 53 changer transitions 0/200 dead transitions. [2024-06-28 00:52:59,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 200 transitions, 2359 flow [2024-06-28 00:52:59,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:52:59,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:52:59,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-28 00:52:59,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6698412698412698 [2024-06-28 00:52:59,029 INFO L175 Difference]: Start difference. First operand has 131 places, 161 transitions, 1801 flow. Second operand 7 states and 211 transitions. [2024-06-28 00:52:59,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 200 transitions, 2359 flow [2024-06-28 00:52:59,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 200 transitions, 2222 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 00:52:59,365 INFO L231 Difference]: Finished difference. Result has 132 places, 163 transitions, 1831 flow [2024-06-28 00:52:59,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1664, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1831, PETRI_PLACES=132, PETRI_TRANSITIONS=163} [2024-06-28 00:52:59,366 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 83 predicate places. [2024-06-28 00:52:59,366 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 163 transitions, 1831 flow [2024-06-28 00:52:59,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:59,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:59,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:59,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 00:52:59,366 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:59,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:59,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1688654687, now seen corresponding path program 1 times [2024-06-28 00:52:59,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:59,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170460844] [2024-06-28 00:52:59,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:59,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:59,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:59,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170460844] [2024-06-28 00:52:59,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170460844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:59,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:59,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:52:59,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954593078] [2024-06-28 00:52:59,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:59,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:52:59,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:59,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:52:59,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:52:59,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:59,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 163 transitions, 1831 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:59,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:59,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:59,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:00,751 INFO L124 PetriNetUnfolderBase]: 6167/10286 cut-off events. [2024-06-28 00:53:00,751 INFO L125 PetriNetUnfolderBase]: For 109252/109259 co-relation queries the response was YES. [2024-06-28 00:53:00,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45159 conditions, 10286 events. 6167/10286 cut-off events. For 109252/109259 co-relation queries the response was YES. Maximal size of possible extension queue 745. Compared 81059 event pairs, 1833 based on Foata normal form. 45/10299 useless extension candidates. Maximal degree in co-relation 45099. Up to 6679 conditions per place. [2024-06-28 00:53:00,828 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 132 selfloop transitions, 62 changer transitions 0/207 dead transitions. [2024-06-28 00:53:00,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 207 transitions, 2413 flow [2024-06-28 00:53:00,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:00,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:00,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-28 00:53:00,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2024-06-28 00:53:00,830 INFO L175 Difference]: Start difference. First operand has 132 places, 163 transitions, 1831 flow. Second operand 7 states and 216 transitions. [2024-06-28 00:53:00,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 207 transitions, 2413 flow [2024-06-28 00:53:01,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 207 transitions, 2282 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 00:53:01,069 INFO L231 Difference]: Finished difference. Result has 134 places, 164 transitions, 1862 flow [2024-06-28 00:53:01,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1862, PETRI_PLACES=134, PETRI_TRANSITIONS=164} [2024-06-28 00:53:01,070 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 85 predicate places. [2024-06-28 00:53:01,070 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 164 transitions, 1862 flow [2024-06-28 00:53:01,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:01,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:01,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:01,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 00:53:01,071 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:01,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:01,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1727599391, now seen corresponding path program 6 times [2024-06-28 00:53:01,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:01,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720840801] [2024-06-28 00:53:01,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:01,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:01,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:01,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720840801] [2024-06-28 00:53:01,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720840801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:01,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:01,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:01,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349368119] [2024-06-28 00:53:01,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:01,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:01,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:01,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:01,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:01,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:01,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 164 transitions, 1862 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:01,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:01,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:01,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:02,454 INFO L124 PetriNetUnfolderBase]: 6226/10347 cut-off events. [2024-06-28 00:53:02,454 INFO L125 PetriNetUnfolderBase]: For 108201/108208 co-relation queries the response was YES. [2024-06-28 00:53:02,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45667 conditions, 10347 events. 6226/10347 cut-off events. For 108201/108208 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 81636 event pairs, 2187 based on Foata normal form. 19/10349 useless extension candidates. Maximal degree in co-relation 45606. Up to 9286 conditions per place. [2024-06-28 00:53:02,525 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 161 selfloop transitions, 29 changer transitions 0/203 dead transitions. [2024-06-28 00:53:02,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 203 transitions, 2362 flow [2024-06-28 00:53:02,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:02,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:02,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-28 00:53:02,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-06-28 00:53:02,526 INFO L175 Difference]: Start difference. First operand has 134 places, 164 transitions, 1862 flow. Second operand 7 states and 201 transitions. [2024-06-28 00:53:02,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 203 transitions, 2362 flow [2024-06-28 00:53:02,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 203 transitions, 2179 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-28 00:53:02,942 INFO L231 Difference]: Finished difference. Result has 135 places, 165 transitions, 1762 flow [2024-06-28 00:53:02,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1679, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1762, PETRI_PLACES=135, PETRI_TRANSITIONS=165} [2024-06-28 00:53:02,942 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 86 predicate places. [2024-06-28 00:53:02,943 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 165 transitions, 1762 flow [2024-06-28 00:53:02,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:02,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:02,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:02,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 00:53:02,943 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:02,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:02,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1727384189, now seen corresponding path program 2 times [2024-06-28 00:53:02,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:02,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108535239] [2024-06-28 00:53:02,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:02,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:03,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:03,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:03,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108535239] [2024-06-28 00:53:03,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108535239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:03,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:03,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:03,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017774118] [2024-06-28 00:53:03,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:03,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:03,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:03,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:03,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:03,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:03,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 165 transitions, 1762 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:03,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:03,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:03,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:04,302 INFO L124 PetriNetUnfolderBase]: 6293/10582 cut-off events. [2024-06-28 00:53:04,303 INFO L125 PetriNetUnfolderBase]: For 110383/110390 co-relation queries the response was YES. [2024-06-28 00:53:04,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45237 conditions, 10582 events. 6293/10582 cut-off events. For 110383/110390 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 84279 event pairs, 3395 based on Foata normal form. 15/10531 useless extension candidates. Maximal degree in co-relation 45176. Up to 9270 conditions per place. [2024-06-28 00:53:04,474 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 163 selfloop transitions, 31 changer transitions 0/207 dead transitions. [2024-06-28 00:53:04,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 207 transitions, 2284 flow [2024-06-28 00:53:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:04,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:04,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-28 00:53:04,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2024-06-28 00:53:04,477 INFO L175 Difference]: Start difference. First operand has 135 places, 165 transitions, 1762 flow. Second operand 7 states and 204 transitions. [2024-06-28 00:53:04,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 207 transitions, 2284 flow [2024-06-28 00:53:04,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 207 transitions, 2217 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 00:53:04,979 INFO L231 Difference]: Finished difference. Result has 137 places, 166 transitions, 1783 flow [2024-06-28 00:53:04,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1695, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1783, PETRI_PLACES=137, PETRI_TRANSITIONS=166} [2024-06-28 00:53:04,980 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 88 predicate places. [2024-06-28 00:53:04,980 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 166 transitions, 1783 flow [2024-06-28 00:53:04,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:04,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:04,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:04,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 00:53:04,980 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:04,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:04,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1461686909, now seen corresponding path program 3 times [2024-06-28 00:53:04,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:04,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291812688] [2024-06-28 00:53:04,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:04,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:05,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:05,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291812688] [2024-06-28 00:53:05,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291812688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:05,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:05,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:05,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204990944] [2024-06-28 00:53:05,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:05,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:05,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:05,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:05,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:05,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:05,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 166 transitions, 1783 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:05,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:05,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:05,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:06,268 INFO L124 PetriNetUnfolderBase]: 6273/10502 cut-off events. [2024-06-28 00:53:06,269 INFO L125 PetriNetUnfolderBase]: For 113329/113336 co-relation queries the response was YES. [2024-06-28 00:53:06,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44964 conditions, 10502 events. 6273/10502 cut-off events. For 113329/113336 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 82769 event pairs, 3229 based on Foata normal form. 15/10461 useless extension candidates. Maximal degree in co-relation 44902. Up to 8559 conditions per place. [2024-06-28 00:53:06,348 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 156 selfloop transitions, 38 changer transitions 0/207 dead transitions. [2024-06-28 00:53:06,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 207 transitions, 2241 flow [2024-06-28 00:53:06,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:06,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:06,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-28 00:53:06,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-28 00:53:06,350 INFO L175 Difference]: Start difference. First operand has 137 places, 166 transitions, 1783 flow. Second operand 7 states and 203 transitions. [2024-06-28 00:53:06,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 207 transitions, 2241 flow [2024-06-28 00:53:06,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 207 transitions, 2165 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 00:53:06,605 INFO L231 Difference]: Finished difference. Result has 138 places, 165 transitions, 1739 flow [2024-06-28 00:53:06,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1659, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1739, PETRI_PLACES=138, PETRI_TRANSITIONS=165} [2024-06-28 00:53:06,606 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 89 predicate places. [2024-06-28 00:53:06,606 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 165 transitions, 1739 flow [2024-06-28 00:53:06,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:06,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:06,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:06,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 00:53:06,606 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:06,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:06,607 INFO L85 PathProgramCache]: Analyzing trace with hash 958398354, now seen corresponding path program 1 times [2024-06-28 00:53:06,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:06,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111233804] [2024-06-28 00:53:06,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:06,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:06,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:06,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:06,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111233804] [2024-06-28 00:53:06,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111233804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:06,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:06,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:06,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377443279] [2024-06-28 00:53:06,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:06,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:06,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:06,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:06,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:06,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:06,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 165 transitions, 1739 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:06,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:06,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:06,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:08,074 INFO L124 PetriNetUnfolderBase]: 6270/10432 cut-off events. [2024-06-28 00:53:08,074 INFO L125 PetriNetUnfolderBase]: For 113544/113548 co-relation queries the response was YES. [2024-06-28 00:53:08,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45130 conditions, 10432 events. 6270/10432 cut-off events. For 113544/113548 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 82311 event pairs, 2154 based on Foata normal form. 5/10430 useless extension candidates. Maximal degree in co-relation 45067. Up to 9621 conditions per place. [2024-06-28 00:53:08,148 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 159 selfloop transitions, 13 changer transitions 0/185 dead transitions. [2024-06-28 00:53:08,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 185 transitions, 2172 flow [2024-06-28 00:53:08,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:53:08,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:53:08,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-28 00:53:08,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6088888888888889 [2024-06-28 00:53:08,150 INFO L175 Difference]: Start difference. First operand has 138 places, 165 transitions, 1739 flow. Second operand 5 states and 137 transitions. [2024-06-28 00:53:08,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 185 transitions, 2172 flow [2024-06-28 00:53:08,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 185 transitions, 2097 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 00:53:08,502 INFO L231 Difference]: Finished difference. Result has 139 places, 168 transitions, 1742 flow [2024-06-28 00:53:08,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1666, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1742, PETRI_PLACES=139, PETRI_TRANSITIONS=168} [2024-06-28 00:53:08,503 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 90 predicate places. [2024-06-28 00:53:08,503 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 168 transitions, 1742 flow [2024-06-28 00:53:08,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:08,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:08,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:08,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 00:53:08,504 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:08,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:08,505 INFO L85 PathProgramCache]: Analyzing trace with hash 252598434, now seen corresponding path program 1 times [2024-06-28 00:53:08,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:08,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534736191] [2024-06-28 00:53:08,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:08,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:08,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:08,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:08,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534736191] [2024-06-28 00:53:08,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534736191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:08,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:08,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:08,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757137683] [2024-06-28 00:53:08,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:08,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:08,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:08,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:08,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:08,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:08,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 168 transitions, 1742 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:08,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:08,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:08,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:09,958 INFO L124 PetriNetUnfolderBase]: 6267/10516 cut-off events. [2024-06-28 00:53:09,958 INFO L125 PetriNetUnfolderBase]: For 119585/119585 co-relation queries the response was YES. [2024-06-28 00:53:10,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45663 conditions, 10516 events. 6267/10516 cut-off events. For 119585/119585 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 83463 event pairs, 3391 based on Foata normal form. 1/10489 useless extension candidates. Maximal degree in co-relation 45599. Up to 9574 conditions per place. [2024-06-28 00:53:10,050 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 170 selfloop transitions, 29 changer transitions 0/212 dead transitions. [2024-06-28 00:53:10,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 212 transitions, 2461 flow [2024-06-28 00:53:10,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:10,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:10,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-28 00:53:10,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-28 00:53:10,051 INFO L175 Difference]: Start difference. First operand has 139 places, 168 transitions, 1742 flow. Second operand 6 states and 171 transitions. [2024-06-28 00:53:10,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 212 transitions, 2461 flow [2024-06-28 00:53:10,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 212 transitions, 2399 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-28 00:53:10,335 INFO L231 Difference]: Finished difference. Result has 145 places, 185 transitions, 1996 flow [2024-06-28 00:53:10,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1996, PETRI_PLACES=145, PETRI_TRANSITIONS=185} [2024-06-28 00:53:10,335 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 96 predicate places. [2024-06-28 00:53:10,335 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 185 transitions, 1996 flow [2024-06-28 00:53:10,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:10,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:10,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:10,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:53:10,336 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:10,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:10,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1629642692, now seen corresponding path program 1 times [2024-06-28 00:53:10,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:10,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423162914] [2024-06-28 00:53:10,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:10,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:10,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:10,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:10,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423162914] [2024-06-28 00:53:10,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423162914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:10,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:10,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:10,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009013434] [2024-06-28 00:53:10,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:10,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:10,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:10,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:10,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:10,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:10,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 185 transitions, 1996 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:10,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:10,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:10,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:12,064 INFO L124 PetriNetUnfolderBase]: 6432/10711 cut-off events. [2024-06-28 00:53:12,064 INFO L125 PetriNetUnfolderBase]: For 135334/135338 co-relation queries the response was YES. [2024-06-28 00:53:12,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49049 conditions, 10711 events. 6432/10711 cut-off events. For 135334/135338 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 84943 event pairs, 2162 based on Foata normal form. 7/10703 useless extension candidates. Maximal degree in co-relation 48981. Up to 9625 conditions per place. [2024-06-28 00:53:12,137 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 173 selfloop transitions, 47 changer transitions 0/233 dead transitions. [2024-06-28 00:53:12,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 233 transitions, 2786 flow [2024-06-28 00:53:12,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:12,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:12,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-28 00:53:12,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-28 00:53:12,139 INFO L175 Difference]: Start difference. First operand has 145 places, 185 transitions, 1996 flow. Second operand 7 states and 198 transitions. [2024-06-28 00:53:12,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 233 transitions, 2786 flow [2024-06-28 00:53:12,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 233 transitions, 2740 flow, removed 23 selfloop flow, removed 0 redundant places. [2024-06-28 00:53:12,478 INFO L231 Difference]: Finished difference. Result has 153 places, 208 transitions, 2394 flow [2024-06-28 00:53:12,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1950, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2394, PETRI_PLACES=153, PETRI_TRANSITIONS=208} [2024-06-28 00:53:12,479 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 104 predicate places. [2024-06-28 00:53:12,479 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 208 transitions, 2394 flow [2024-06-28 00:53:12,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:12,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:12,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:12,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:53:12,480 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:12,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:12,481 INFO L85 PathProgramCache]: Analyzing trace with hash -570399662, now seen corresponding path program 2 times [2024-06-28 00:53:12,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:12,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240488255] [2024-06-28 00:53:12,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:12,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:12,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:12,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240488255] [2024-06-28 00:53:12,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240488255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:12,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:12,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:12,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564995326] [2024-06-28 00:53:12,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:12,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:12,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:12,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:12,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:12,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:12,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 208 transitions, 2394 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:12,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:12,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:12,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:14,084 INFO L124 PetriNetUnfolderBase]: 6456/10764 cut-off events. [2024-06-28 00:53:14,084 INFO L125 PetriNetUnfolderBase]: For 142589/142593 co-relation queries the response was YES. [2024-06-28 00:53:14,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50021 conditions, 10764 events. 6456/10764 cut-off events. For 142589/142593 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 85491 event pairs, 2164 based on Foata normal form. 7/10762 useless extension candidates. Maximal degree in co-relation 49949. Up to 9364 conditions per place. [2024-06-28 00:53:14,178 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 138 selfloop transitions, 96 changer transitions 0/247 dead transitions. [2024-06-28 00:53:14,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 247 transitions, 3141 flow [2024-06-28 00:53:14,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:14,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:14,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-28 00:53:14,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6730158730158731 [2024-06-28 00:53:14,180 INFO L175 Difference]: Start difference. First operand has 153 places, 208 transitions, 2394 flow. Second operand 7 states and 212 transitions. [2024-06-28 00:53:14,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 247 transitions, 3141 flow [2024-06-28 00:53:14,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 247 transitions, 3044 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-28 00:53:14,653 INFO L231 Difference]: Finished difference. Result has 157 places, 215 transitions, 2612 flow [2024-06-28 00:53:14,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2297, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2612, PETRI_PLACES=157, PETRI_TRANSITIONS=215} [2024-06-28 00:53:14,654 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 108 predicate places. [2024-06-28 00:53:14,654 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 215 transitions, 2612 flow [2024-06-28 00:53:14,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:14,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:14,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:14,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 00:53:14,655 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:14,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:14,656 INFO L85 PathProgramCache]: Analyzing trace with hash -570162512, now seen corresponding path program 3 times [2024-06-28 00:53:14,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:14,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901967933] [2024-06-28 00:53:14,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:14,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:14,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:14,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:14,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901967933] [2024-06-28 00:53:14,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901967933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:14,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:14,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:14,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85054030] [2024-06-28 00:53:14,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:14,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:14,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:14,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:14,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:14,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:14,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 215 transitions, 2612 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:14,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:14,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:14,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:16,026 INFO L124 PetriNetUnfolderBase]: 6376/10611 cut-off events. [2024-06-28 00:53:16,027 INFO L125 PetriNetUnfolderBase]: For 148462/148469 co-relation queries the response was YES. [2024-06-28 00:53:16,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49962 conditions, 10611 events. 6376/10611 cut-off events. For 148462/148469 co-relation queries the response was YES. Maximal size of possible extension queue 753. Compared 83878 event pairs, 2146 based on Foata normal form. 6/10593 useless extension candidates. Maximal degree in co-relation 49889. Up to 9220 conditions per place. [2024-06-28 00:53:16,379 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 137 selfloop transitions, 87 changer transitions 0/237 dead transitions. [2024-06-28 00:53:16,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 237 transitions, 3168 flow [2024-06-28 00:53:16,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:16,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:16,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-28 00:53:16,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-28 00:53:16,391 INFO L175 Difference]: Start difference. First operand has 157 places, 215 transitions, 2612 flow. Second operand 6 states and 175 transitions. [2024-06-28 00:53:16,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 237 transitions, 3168 flow [2024-06-28 00:53:16,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 237 transitions, 3027 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 00:53:16,878 INFO L231 Difference]: Finished difference. Result has 159 places, 215 transitions, 2657 flow [2024-06-28 00:53:16,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2471, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2657, PETRI_PLACES=159, PETRI_TRANSITIONS=215} [2024-06-28 00:53:16,879 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 110 predicate places. [2024-06-28 00:53:16,879 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 215 transitions, 2657 flow [2024-06-28 00:53:16,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:16,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:16,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:16,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 00:53:16,880 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:16,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:16,880 INFO L85 PathProgramCache]: Analyzing trace with hash -570153584, now seen corresponding path program 1 times [2024-06-28 00:53:16,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:16,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143379622] [2024-06-28 00:53:16,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:16,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:16,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:16,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143379622] [2024-06-28 00:53:16,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143379622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:16,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:16,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:16,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177612969] [2024-06-28 00:53:16,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:16,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:16,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:16,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:16,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:17,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:17,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 215 transitions, 2657 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:17,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:17,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:17,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:18,425 INFO L124 PetriNetUnfolderBase]: 6366/10555 cut-off events. [2024-06-28 00:53:18,425 INFO L125 PetriNetUnfolderBase]: For 155266/155270 co-relation queries the response was YES. [2024-06-28 00:53:18,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50025 conditions, 10555 events. 6366/10555 cut-off events. For 155266/155270 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 82953 event pairs, 2028 based on Foata normal form. 8/10554 useless extension candidates. Maximal degree in co-relation 49951. Up to 9689 conditions per place. [2024-06-28 00:53:18,508 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 205 selfloop transitions, 16 changer transitions 0/234 dead transitions. [2024-06-28 00:53:18,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 234 transitions, 3182 flow [2024-06-28 00:53:18,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:53:18,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:53:18,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-28 00:53:18,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2024-06-28 00:53:18,510 INFO L175 Difference]: Start difference. First operand has 159 places, 215 transitions, 2657 flow. Second operand 5 states and 138 transitions. [2024-06-28 00:53:18,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 234 transitions, 3182 flow [2024-06-28 00:53:19,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 234 transitions, 2921 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 00:53:19,010 INFO L231 Difference]: Finished difference. Result has 158 places, 217 transitions, 2477 flow [2024-06-28 00:53:19,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2396, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2477, PETRI_PLACES=158, PETRI_TRANSITIONS=217} [2024-06-28 00:53:19,010 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 109 predicate places. [2024-06-28 00:53:19,010 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 217 transitions, 2477 flow [2024-06-28 00:53:19,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:19,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:19,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:19,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 00:53:19,011 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:19,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:19,012 INFO L85 PathProgramCache]: Analyzing trace with hash -502847104, now seen corresponding path program 1 times [2024-06-28 00:53:19,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:19,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038535350] [2024-06-28 00:53:19,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:19,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:19,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:19,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038535350] [2024-06-28 00:53:19,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038535350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:19,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:19,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:19,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533275032] [2024-06-28 00:53:19,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:19,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:19,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:19,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:19,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:19,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:19,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 217 transitions, 2477 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:19,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:19,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:19,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:20,599 INFO L124 PetriNetUnfolderBase]: 6399/10641 cut-off events. [2024-06-28 00:53:20,599 INFO L125 PetriNetUnfolderBase]: For 159488/159495 co-relation queries the response was YES. [2024-06-28 00:53:20,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50048 conditions, 10641 events. 6399/10641 cut-off events. For 159488/159495 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 83993 event pairs, 2113 based on Foata normal form. 9/10625 useless extension candidates. Maximal degree in co-relation 49973. Up to 9234 conditions per place. [2024-06-28 00:53:20,697 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 153 selfloop transitions, 91 changer transitions 0/257 dead transitions. [2024-06-28 00:53:20,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 257 transitions, 3178 flow [2024-06-28 00:53:20,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:20,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:20,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-28 00:53:20,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6698412698412698 [2024-06-28 00:53:20,699 INFO L175 Difference]: Start difference. First operand has 158 places, 217 transitions, 2477 flow. Second operand 7 states and 211 transitions. [2024-06-28 00:53:20,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 257 transitions, 3178 flow [2024-06-28 00:53:21,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 257 transitions, 3109 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-28 00:53:21,217 INFO L231 Difference]: Finished difference. Result has 162 places, 222 transitions, 2666 flow [2024-06-28 00:53:21,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2666, PETRI_PLACES=162, PETRI_TRANSITIONS=222} [2024-06-28 00:53:21,218 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 113 predicate places. [2024-06-28 00:53:21,218 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 222 transitions, 2666 flow [2024-06-28 00:53:21,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:21,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:21,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:21,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 00:53:21,218 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:21,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:21,219 INFO L85 PathProgramCache]: Analyzing trace with hash -502835944, now seen corresponding path program 2 times [2024-06-28 00:53:21,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:21,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917125904] [2024-06-28 00:53:21,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:21,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:21,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:21,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917125904] [2024-06-28 00:53:21,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917125904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:21,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:21,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:21,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129392645] [2024-06-28 00:53:21,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:21,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:21,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:21,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:21,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:21,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:21,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 222 transitions, 2666 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:21,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:21,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:21,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:22,520 INFO L124 PetriNetUnfolderBase]: 6334/10526 cut-off events. [2024-06-28 00:53:22,521 INFO L125 PetriNetUnfolderBase]: For 160178/160185 co-relation queries the response was YES. [2024-06-28 00:53:22,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49871 conditions, 10526 events. 6334/10526 cut-off events. For 160178/160185 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 82676 event pairs, 2110 based on Foata normal form. 6/10508 useless extension candidates. Maximal degree in co-relation 49795. Up to 9117 conditions per place. [2024-06-28 00:53:22,630 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 138 selfloop transitions, 92 changer transitions 0/243 dead transitions. [2024-06-28 00:53:22,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 243 transitions, 3174 flow [2024-06-28 00:53:22,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:22,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:22,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-28 00:53:22,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-28 00:53:22,632 INFO L175 Difference]: Start difference. First operand has 162 places, 222 transitions, 2666 flow. Second operand 6 states and 174 transitions. [2024-06-28 00:53:22,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 243 transitions, 3174 flow [2024-06-28 00:53:23,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 243 transitions, 3008 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 00:53:23,235 INFO L231 Difference]: Finished difference. Result has 164 places, 222 transitions, 2695 flow [2024-06-28 00:53:23,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2500, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2695, PETRI_PLACES=164, PETRI_TRANSITIONS=222} [2024-06-28 00:53:23,235 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 115 predicate places. [2024-06-28 00:53:23,235 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 222 transitions, 2695 flow [2024-06-28 00:53:23,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:23,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:23,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:23,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 00:53:23,236 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:23,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:23,237 INFO L85 PathProgramCache]: Analyzing trace with hash -495352616, now seen corresponding path program 3 times [2024-06-28 00:53:23,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:23,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735249948] [2024-06-28 00:53:23,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:23,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:23,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:23,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735249948] [2024-06-28 00:53:23,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735249948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:23,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:23,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:23,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034129537] [2024-06-28 00:53:23,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:23,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:23,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:23,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:23,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:23,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:23,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 222 transitions, 2695 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:23,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:23,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:23,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:24,444 INFO L124 PetriNetUnfolderBase]: 6455/10713 cut-off events. [2024-06-28 00:53:24,444 INFO L125 PetriNetUnfolderBase]: For 172665/172672 co-relation queries the response was YES. [2024-06-28 00:53:24,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51489 conditions, 10713 events. 6455/10713 cut-off events. For 172665/172672 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 84115 event pairs, 2097 based on Foata normal form. 6/10693 useless extension candidates. Maximal degree in co-relation 51412. Up to 9106 conditions per place. [2024-06-28 00:53:24,542 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 147 selfloop transitions, 108 changer transitions 0/268 dead transitions. [2024-06-28 00:53:24,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 268 transitions, 3721 flow [2024-06-28 00:53:24,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:24,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-28 00:53:24,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-28 00:53:24,543 INFO L175 Difference]: Start difference. First operand has 164 places, 222 transitions, 2695 flow. Second operand 7 states and 203 transitions. [2024-06-28 00:53:24,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 268 transitions, 3721 flow [2024-06-28 00:53:25,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 268 transitions, 3449 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-28 00:53:25,092 INFO L231 Difference]: Finished difference. Result has 166 places, 239 transitions, 2946 flow [2024-06-28 00:53:25,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2423, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2946, PETRI_PLACES=166, PETRI_TRANSITIONS=239} [2024-06-28 00:53:25,093 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 117 predicate places. [2024-06-28 00:53:25,093 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 239 transitions, 2946 flow [2024-06-28 00:53:25,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:25,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:25,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:25,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 00:53:25,094 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:25,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:25,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1512841884, now seen corresponding path program 1 times [2024-06-28 00:53:25,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:25,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951461153] [2024-06-28 00:53:25,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:25,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:25,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:25,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951461153] [2024-06-28 00:53:25,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951461153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:25,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:25,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:25,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527492578] [2024-06-28 00:53:25,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:25,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:25,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:25,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:25,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:25,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:25,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 239 transitions, 2946 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:25,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:25,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:25,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:26,675 INFO L124 PetriNetUnfolderBase]: 6452/10762 cut-off events. [2024-06-28 00:53:26,675 INFO L125 PetriNetUnfolderBase]: For 186189/186189 co-relation queries the response was YES. [2024-06-28 00:53:26,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54231 conditions, 10762 events. 6452/10762 cut-off events. For 186189/186189 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 84872 event pairs, 3348 based on Foata normal form. 1/10731 useless extension candidates. Maximal degree in co-relation 54151. Up to 9716 conditions per place. [2024-06-28 00:53:26,777 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 215 selfloop transitions, 41 changer transitions 0/269 dead transitions. [2024-06-28 00:53:26,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 269 transitions, 3558 flow [2024-06-28 00:53:26,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:26,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:26,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-28 00:53:26,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126984126984127 [2024-06-28 00:53:26,779 INFO L175 Difference]: Start difference. First operand has 166 places, 239 transitions, 2946 flow. Second operand 7 states and 193 transitions. [2024-06-28 00:53:26,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 269 transitions, 3558 flow [2024-06-28 00:53:27,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 269 transitions, 3402 flow, removed 55 selfloop flow, removed 2 redundant places. [2024-06-28 00:53:27,455 INFO L231 Difference]: Finished difference. Result has 171 places, 239 transitions, 2881 flow [2024-06-28 00:53:27,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2793, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2881, PETRI_PLACES=171, PETRI_TRANSITIONS=239} [2024-06-28 00:53:27,456 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 122 predicate places. [2024-06-28 00:53:27,456 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 239 transitions, 2881 flow [2024-06-28 00:53:27,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:27,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:27,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:27,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 00:53:27,456 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:27,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:27,457 INFO L85 PathProgramCache]: Analyzing trace with hash 582233287, now seen corresponding path program 1 times [2024-06-28 00:53:27,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:27,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193567117] [2024-06-28 00:53:27,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:27,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:27,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:27,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193567117] [2024-06-28 00:53:27,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193567117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:27,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:27,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:27,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650924464] [2024-06-28 00:53:27,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:27,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:27,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:27,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:27,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:27,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:27,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 239 transitions, 2881 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:27,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:27,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:27,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:28,830 INFO L124 PetriNetUnfolderBase]: 6530/10805 cut-off events. [2024-06-28 00:53:28,830 INFO L125 PetriNetUnfolderBase]: For 195522/195526 co-relation queries the response was YES. [2024-06-28 00:53:28,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54375 conditions, 10805 events. 6530/10805 cut-off events. For 195522/195526 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 84710 event pairs, 2064 based on Foata normal form. 3/10792 useless extension candidates. Maximal degree in co-relation 54294. Up to 9310 conditions per place. [2024-06-28 00:53:28,934 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 156 selfloop transitions, 117 changer transitions 0/286 dead transitions. [2024-06-28 00:53:28,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 286 transitions, 3847 flow [2024-06-28 00:53:28,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:53:28,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:53:28,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-28 00:53:28,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-28 00:53:28,936 INFO L175 Difference]: Start difference. First operand has 171 places, 239 transitions, 2881 flow. Second operand 8 states and 236 transitions. [2024-06-28 00:53:28,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 286 transitions, 3847 flow [2024-06-28 00:53:29,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 286 transitions, 3755 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 00:53:29,617 INFO L231 Difference]: Finished difference. Result has 174 places, 250 transitions, 3214 flow [2024-06-28 00:53:29,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3214, PETRI_PLACES=174, PETRI_TRANSITIONS=250} [2024-06-28 00:53:29,617 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 125 predicate places. [2024-06-28 00:53:29,617 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 250 transitions, 3214 flow [2024-06-28 00:53:29,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:29,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:29,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:29,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 00:53:29,618 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:29,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:29,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1170911625, now seen corresponding path program 2 times [2024-06-28 00:53:29,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:29,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64667186] [2024-06-28 00:53:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:29,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:29,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:29,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64667186] [2024-06-28 00:53:29,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64667186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:29,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:29,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:29,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403416592] [2024-06-28 00:53:29,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:29,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:29,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:29,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:29,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:29,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:29,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 250 transitions, 3214 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:29,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:29,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:29,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:31,188 INFO L124 PetriNetUnfolderBase]: 6569/10927 cut-off events. [2024-06-28 00:53:31,188 INFO L125 PetriNetUnfolderBase]: For 217835/217839 co-relation queries the response was YES. [2024-06-28 00:53:31,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57814 conditions, 10927 events. 6569/10927 cut-off events. For 217835/217839 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 86219 event pairs, 2142 based on Foata normal form. 2/10891 useless extension candidates. Maximal degree in co-relation 57732. Up to 9111 conditions per place. [2024-06-28 00:53:31,301 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 146 selfloop transitions, 147 changer transitions 0/306 dead transitions. [2024-06-28 00:53:31,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 306 transitions, 4580 flow [2024-06-28 00:53:31,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:31,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:31,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-28 00:53:31,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 00:53:31,303 INFO L175 Difference]: Start difference. First operand has 174 places, 250 transitions, 3214 flow. Second operand 7 states and 210 transitions. [2024-06-28 00:53:31,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 306 transitions, 4580 flow [2024-06-28 00:53:32,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 306 transitions, 4395 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-06-28 00:53:32,016 INFO L231 Difference]: Finished difference. Result has 180 places, 271 transitions, 3810 flow [2024-06-28 00:53:32,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3043, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3810, PETRI_PLACES=180, PETRI_TRANSITIONS=271} [2024-06-28 00:53:32,017 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 131 predicate places. [2024-06-28 00:53:32,017 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 271 transitions, 3810 flow [2024-06-28 00:53:32,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:32,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:32,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:32,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 00:53:32,018 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:32,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:32,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1159483785, now seen corresponding path program 3 times [2024-06-28 00:53:32,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:32,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601489505] [2024-06-28 00:53:32,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:32,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:32,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:32,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601489505] [2024-06-28 00:53:32,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601489505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:32,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:32,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:32,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580204186] [2024-06-28 00:53:32,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:32,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:32,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:32,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:32,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:32,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:32,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 271 transitions, 3810 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:32,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:32,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:32,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:33,438 INFO L124 PetriNetUnfolderBase]: 6566/10886 cut-off events. [2024-06-28 00:53:33,439 INFO L125 PetriNetUnfolderBase]: For 229903/229907 co-relation queries the response was YES. [2024-06-28 00:53:33,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59156 conditions, 10886 events. 6566/10886 cut-off events. For 229903/229907 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 85627 event pairs, 2143 based on Foata normal form. 2/10850 useless extension candidates. Maximal degree in co-relation 59070. Up to 9110 conditions per place. [2024-06-28 00:53:33,550 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 143 selfloop transitions, 147 changer transitions 0/303 dead transitions. [2024-06-28 00:53:33,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 303 transitions, 4748 flow [2024-06-28 00:53:33,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:33,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:33,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-28 00:53:33,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2024-06-28 00:53:33,551 INFO L175 Difference]: Start difference. First operand has 180 places, 271 transitions, 3810 flow. Second operand 7 states and 206 transitions. [2024-06-28 00:53:33,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 303 transitions, 4748 flow [2024-06-28 00:53:34,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 303 transitions, 4624 flow, removed 62 selfloop flow, removed 0 redundant places. [2024-06-28 00:53:34,445 INFO L231 Difference]: Finished difference. Result has 187 places, 272 transitions, 4020 flow [2024-06-28 00:53:34,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3696, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4020, PETRI_PLACES=187, PETRI_TRANSITIONS=272} [2024-06-28 00:53:34,446 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 138 predicate places. [2024-06-28 00:53:34,446 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 272 transitions, 4020 flow [2024-06-28 00:53:34,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:34,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:34,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:34,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 00:53:34,447 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:34,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:34,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1044192615, now seen corresponding path program 4 times [2024-06-28 00:53:34,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:34,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822453375] [2024-06-28 00:53:34,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:34,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:34,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:34,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822453375] [2024-06-28 00:53:34,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822453375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:34,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:34,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:34,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85544783] [2024-06-28 00:53:34,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:34,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:34,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:34,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:34,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:34,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:34,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 272 transitions, 4020 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:34,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:34,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:34,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand