./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/lazy01.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/lazy01.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d8006e4b 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/lazy01.i ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/lazy01.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-dev-d8006e4-m [2024-02-05 10:37:31,281 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-05 10:37:31,343 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-05 10:37:31,350 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-05 10:37:31,351 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-05 10:37:31,379 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-05 10:37:31,380 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-05 10:37:31,380 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-05 10:37:31,380 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-05 10:37:31,384 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-05 10:37:31,384 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-05 10:37:31,384 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-05 10:37:31,385 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-05 10:37:31,386 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-05 10:37:31,386 INFO L153 SettingsManager]: * Use SBE=true [2024-02-05 10:37:31,386 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-05 10:37:31,387 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-05 10:37:31,387 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-05 10:37:31,387 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-05 10:37:31,387 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-05 10:37:31,388 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-05 10:37:31,389 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-05 10:37:31,389 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-05 10:37:31,389 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-05 10:37:31,389 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-05 10:37:31,389 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-05 10:37:31,390 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-05 10:37:31,390 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-05 10:37:31,390 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-05 10:37:31,390 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-05 10:37:31,391 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-05 10:37:31,391 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-05 10:37:31,392 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:37:31,392 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-05 10:37:31,392 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-05 10:37:31,392 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-05 10:37:31,392 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-05 10:37:31,393 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-05 10:37:31,393 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-05 10:37:31,393 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-05 10:37:31,393 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-05 10:37:31,393 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-05 10:37:31,393 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-05 10:37:31,394 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-05 10:37:31,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-05 10:37:31,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-05 10:37:31,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-05 10:37:31,626 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-05 10:37:31,627 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-05 10:37:31,628 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/lazy01.yml/witness.yml [2024-02-05 10:37:31,755 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-05 10:37:31,756 INFO L274 PluginConnector]: CDTParser initialized [2024-02-05 10:37:31,756 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/lazy01.i [2024-02-05 10:37:32,761 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-05 10:37:33,067 INFO L384 CDTParser]: Found 1 translation units. [2024-02-05 10:37:33,070 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/lazy01.i [2024-02-05 10:37:33,082 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edd9cdba1/2156c0ad4a5f4175b8478c084df598dd/FLAG10966c317 [2024-02-05 10:37:33,094 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edd9cdba1/2156c0ad4a5f4175b8478c084df598dd [2024-02-05 10:37:33,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-05 10:37:33,096 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-05 10:37:33,098 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-05 10:37:33,098 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-05 10:37:33,102 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-05 10:37:33,103 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:37:31" (1/2) ... [2024-02-05 10:37:33,104 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5216b09b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:37:33, skipping insertion in model container [2024-02-05 10:37:33,104 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:37:31" (1/2) ... [2024-02-05 10:37:33,106 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@19b08fd4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:37:33, skipping insertion in model container [2024-02-05 10:37:33,106 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:37:33" (2/2) ... [2024-02-05 10:37:33,106 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5216b09b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:37:33, skipping insertion in model container [2024-02-05 10:37:33,106 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:37:33" (2/2) ... [2024-02-05 10:37:33,107 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-05 10:37:33,177 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-05 10:37:33,178 INFO L101 nessWitnessExtractor]: Location invariant before [L715-L715] (2 <= data) && ((unsigned long )arg == 0UL) [2024-02-05 10:37:33,178 INFO L101 nessWitnessExtractor]: Location invariant before [L730-L730] data == 0 [2024-02-05 10:37:33,178 INFO L101 nessWitnessExtractor]: Location invariant before [L707-L707] (0 <= data) && ((unsigned long )arg == 0UL) [2024-02-05 10:37:33,179 INFO L101 nessWitnessExtractor]: Location invariant before [L721-L721] (0 <= data) && ((unsigned long )arg == 0UL) [2024-02-05 10:37:33,179 INFO L101 nessWitnessExtractor]: Location invariant before [L708-L708] (1 <= data) && ((unsigned long )arg == 0UL) [2024-02-05 10:37:33,179 INFO L101 nessWitnessExtractor]: Location invariant before [L713-L713] (unsigned long )arg == 0UL [2024-02-05 10:37:33,179 INFO L101 nessWitnessExtractor]: Location invariant before [L732-L732] data == 0 [2024-02-05 10:37:33,179 INFO L101 nessWitnessExtractor]: Location invariant before [L720-L720] (unsigned long )arg == 0UL [2024-02-05 10:37:33,179 INFO L101 nessWitnessExtractor]: Location invariant after [L722-L722] ((3 <= data) && ((unsigned long )arg == 0UL)) && (data != 0) [2024-02-05 10:37:33,179 INFO L101 nessWitnessExtractor]: Location invariant before [L725-L725] ((0 <= data) && (data <= 2)) && ((unsigned long )arg == 0UL) [2024-02-05 10:37:33,180 INFO L101 nessWitnessExtractor]: Location invariant before [L726-L726] (unsigned long )arg == 0UL [2024-02-05 10:37:33,180 INFO L101 nessWitnessExtractor]: Location invariant before [L706-L706] (unsigned long )arg == 0UL [2024-02-05 10:37:33,180 INFO L101 nessWitnessExtractor]: Location invariant before [L714-L714] (0 <= data) && ((unsigned long )arg == 0UL) [2024-02-05 10:37:33,180 INFO L101 nessWitnessExtractor]: Location invariant before [L716-L716] (unsigned long )arg == 0UL [2024-02-05 10:37:33,180 INFO L101 nessWitnessExtractor]: Location invariant before [L722-L722] ((3 <= data) && ((unsigned long )arg == 0UL)) && (data != 0) [2024-02-05 10:37:33,180 INFO L101 nessWitnessExtractor]: Location invariant before [L709-L709] (unsigned long )arg == 0UL [2024-02-05 10:37:33,215 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-02-05 10:37:33,469 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/lazy01.i[31042,31055] [2024-02-05 10:37:33,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:37:33,498 INFO L204 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-05 10:37:33,558 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/lazy01.i[31042,31055] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-05 10:37:33,565 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:37:33,592 INFO L208 MainTranslator]: Completed translation [2024-02-05 10:37:33,593 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:37:33 WrapperNode [2024-02-05 10:37:33,593 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-05 10:37:33,594 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-05 10:37:33,594 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-05 10:37:33,594 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-05 10:37:33,600 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:37:33" (1/1) ... [2024-02-05 10:37:33,612 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:37:33" (1/1) ... [2024-02-05 10:37:33,631 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 63 [2024-02-05 10:37:33,632 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-05 10:37:33,632 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-05 10:37:33,633 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-05 10:37:33,633 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-05 10:37:33,642 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:37:33" (1/1) ... [2024-02-05 10:37:33,643 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:37:33" (1/1) ... [2024-02-05 10:37:33,645 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:37:33" (1/1) ... [2024-02-05 10:37:33,658 INFO L175 MemorySlicer]: Split 13 memory accesses to 5 slices as follows [2, 2, 5, 2, 2]. 38 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0, 0]. The 3 writes are split as follows [0, 1, 0, 1, 1]. [2024-02-05 10:37:33,658 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:37:33" (1/1) ... [2024-02-05 10:37:33,659 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:37:33" (1/1) ... [2024-02-05 10:37:33,665 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:37:33" (1/1) ... [2024-02-05 10:37:33,667 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:37:33" (1/1) ... [2024-02-05 10:37:33,669 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:37:33" (1/1) ... [2024-02-05 10:37:33,670 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:37:33" (1/1) ... [2024-02-05 10:37:33,672 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-05 10:37:33,673 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-05 10:37:33,673 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-05 10:37:33,673 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-05 10:37:33,674 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:37:33" (1/1) ... [2024-02-05 10:37:33,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:37:33,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:37:33,700 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) [2024-02-05 10:37:33,748 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 [2024-02-05 10:37:33,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-05 10:37:33,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-05 10:37:33,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-05 10:37:33,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-05 10:37:33,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-05 10:37:33,770 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-05 10:37:33,770 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-05 10:37:33,771 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-05 10:37:33,771 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-05 10:37:33,771 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-05 10:37:33,771 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-05 10:37:33,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-05 10:37:33,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-05 10:37:33,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-05 10:37:33,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-05 10:37:33,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-05 10:37:33,772 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-05 10:37:33,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-05 10:37:33,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-05 10:37:33,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-05 10:37:33,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-05 10:37:33,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-05 10:37:33,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-05 10:37:33,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-05 10:37:33,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-05 10:37:33,774 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-05 10:37:33,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-05 10:37:33,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-05 10:37:33,776 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-05 10:37:33,919 INFO L244 CfgBuilder]: Building ICFG [2024-02-05 10:37:33,920 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-05 10:37:34,097 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-05 10:37:34,097 INFO L293 CfgBuilder]: Performing block encoding [2024-02-05 10:37:34,167 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-05 10:37:34,167 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-02-05 10:37:34,167 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:37:34 BoogieIcfgContainer [2024-02-05 10:37:34,167 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-05 10:37:34,169 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-05 10:37:34,169 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-05 10:37:34,171 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-05 10:37:34,171 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:37:31" (1/4) ... [2024-02-05 10:37:34,172 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d4836b1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 05.02 10:37:34, skipping insertion in model container [2024-02-05 10:37:34,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 10:37:33" (2/4) ... [2024-02-05 10:37:34,172 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d4836b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:37:34, skipping insertion in model container [2024-02-05 10:37:34,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:37:33" (3/4) ... [2024-02-05 10:37:34,172 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d4836b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:37:34, skipping insertion in model container [2024-02-05 10:37:34,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:37:34" (4/4) ... [2024-02-05 10:37:34,173 INFO L112 eAbstractionObserver]: Analyzing ICFG lazy01.i [2024-02-05 10:37:34,185 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-05 10:37:34,186 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-02-05 10:37:34,186 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-05 10:37:34,263 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-02-05 10:37:34,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 65 transitions, 151 flow [2024-02-05 10:37:34,312 INFO L124 PetriNetUnfolderBase]: 1/62 cut-off events. [2024-02-05 10:37:34,313 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-05 10:37:34,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 62 events. 1/62 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 150 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2024-02-05 10:37:34,316 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 65 transitions, 151 flow [2024-02-05 10:37:34,318 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 60 transitions, 135 flow [2024-02-05 10:37:34,325 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:37:34,330 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;@73a2eb4a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:37:34,330 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-02-05 10:37:34,332 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:37:34,332 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-05 10:37:34,332 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:37:34,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:34,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-05 10:37:34,333 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-05 10:37:34,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:34,338 INFO L85 PathProgramCache]: Analyzing trace with hash 8284, now seen corresponding path program 1 times [2024-02-05 10:37:34,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:34,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810377989] [2024-02-05 10:37:34,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:34,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:34,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:34,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810377989] [2024-02-05 10:37:34,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810377989] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:37:34,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:37:34,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-05 10:37:34,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886860411] [2024-02-05 10:37:34,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:37:34,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:37:34,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:34,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:37:34,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:37:34,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 65 [2024-02-05 10:37:34,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 60 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:34,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:34,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 65 [2024-02-05 10:37:34,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:35,019 INFO L124 PetriNetUnfolderBase]: 1085/2103 cut-off events. [2024-02-05 10:37:35,020 INFO L125 PetriNetUnfolderBase]: For 134/134 co-relation queries the response was YES. [2024-02-05 10:37:35,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3908 conditions, 2103 events. 1085/2103 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14200 event pairs, 407 based on Foata normal form. 82/2132 useless extension candidates. Maximal degree in co-relation 3417. Up to 1575 conditions per place. [2024-02-05 10:37:35,058 INFO L140 encePairwiseOnDemand]: 58/65 looper letters, 37 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2024-02-05 10:37:35,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 69 transitions, 239 flow [2024-02-05 10:37:35,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:37:35,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:37:35,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2024-02-05 10:37:35,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.717948717948718 [2024-02-05 10:37:35,072 INFO L175 Difference]: Start difference. First operand has 69 places, 60 transitions, 135 flow. Second operand 3 states and 140 transitions. [2024-02-05 10:37:35,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 69 transitions, 239 flow [2024-02-05 10:37:35,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 69 transitions, 227 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-02-05 10:37:35,083 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 139 flow [2024-02-05 10:37:35,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-02-05 10:37:35,087 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -4 predicate places. [2024-02-05 10:37:35,087 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 139 flow [2024-02-05 10:37:35,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:35,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:35,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-05 10:37:35,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-05 10:37:35,089 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-05 10:37:35,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:35,090 INFO L85 PathProgramCache]: Analyzing trace with hash -931074202, now seen corresponding path program 1 times [2024-02-05 10:37:35,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:35,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581646846] [2024-02-05 10:37:35,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:35,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:35,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:35,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581646846] [2024-02-05 10:37:35,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581646846] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:37:35,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:37:35,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:37:35,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713111728] [2024-02-05 10:37:35,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:37:35,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:37:35,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:35,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:37:35,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:37:35,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 65 [2024-02-05 10:37:35,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:35,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:35,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 65 [2024-02-05 10:37:35,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:35,474 INFO L124 PetriNetUnfolderBase]: 654/1511 cut-off events. [2024-02-05 10:37:35,474 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2024-02-05 10:37:35,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2819 conditions, 1511 events. 654/1511 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10802 event pairs, 144 based on Foata normal form. 52/1424 useless extension candidates. Maximal degree in co-relation 1195. Up to 931 conditions per place. [2024-02-05 10:37:35,481 INFO L140 encePairwiseOnDemand]: 61/65 looper letters, 37 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2024-02-05 10:37:35,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 69 transitions, 243 flow [2024-02-05 10:37:35,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:37:35,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:37:35,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 179 transitions. [2024-02-05 10:37:35,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6884615384615385 [2024-02-05 10:37:35,483 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 139 flow. Second operand 4 states and 179 transitions. [2024-02-05 10:37:35,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 69 transitions, 243 flow [2024-02-05 10:37:35,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 69 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:37:35,484 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 136 flow [2024-02-05 10:37:35,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2024-02-05 10:37:35,485 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -4 predicate places. [2024-02-05 10:37:35,485 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 136 flow [2024-02-05 10:37:35,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:35,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:35,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:37:35,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-05 10:37:35,486 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-05 10:37:35,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:35,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1410395163, now seen corresponding path program 1 times [2024-02-05 10:37:35,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:35,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124432619] [2024-02-05 10:37:35,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:35,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:35,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:35,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124432619] [2024-02-05 10:37:35,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124432619] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:37:35,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:37:35,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:37:35,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867311583] [2024-02-05 10:37:35,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:37:35,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:37:35,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:35,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:37:35,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:37:35,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 65 [2024-02-05 10:37:35,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:35,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:35,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 65 [2024-02-05 10:37:35,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:35,731 INFO L124 PetriNetUnfolderBase]: 665/1530 cut-off events. [2024-02-05 10:37:35,731 INFO L125 PetriNetUnfolderBase]: For 146/146 co-relation queries the response was YES. [2024-02-05 10:37:35,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2804 conditions, 1530 events. 665/1530 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10822 event pairs, 141 based on Foata normal form. 58/1444 useless extension candidates. Maximal degree in co-relation 2787. Up to 916 conditions per place. [2024-02-05 10:37:35,741 INFO L140 encePairwiseOnDemand]: 61/65 looper letters, 41 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2024-02-05 10:37:35,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 71 transitions, 257 flow [2024-02-05 10:37:35,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:37:35,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:37:35,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 183 transitions. [2024-02-05 10:37:35,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7038461538461539 [2024-02-05 10:37:35,754 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 136 flow. Second operand 4 states and 183 transitions. [2024-02-05 10:37:35,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 71 transitions, 257 flow [2024-02-05 10:37:35,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 71 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:37:35,756 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 133 flow [2024-02-05 10:37:35,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=133, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2024-02-05 10:37:35,757 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -5 predicate places. [2024-02-05 10:37:35,757 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 133 flow [2024-02-05 10:37:35,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:35,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:35,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:37:35,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-05 10:37:35,758 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-05 10:37:35,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:35,758 INFO L85 PathProgramCache]: Analyzing trace with hash -732458266, now seen corresponding path program 1 times [2024-02-05 10:37:35,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:35,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440887084] [2024-02-05 10:37:35,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:35,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:35,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:35,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440887084] [2024-02-05 10:37:35,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440887084] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:37:35,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:37:35,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:37:35,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183594550] [2024-02-05 10:37:35,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:37:35,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:37:35,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:35,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:37:35,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:37:35,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 65 [2024-02-05 10:37:35,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:35,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:35,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 65 [2024-02-05 10:37:35,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:36,087 INFO L124 PetriNetUnfolderBase]: 1519/2774 cut-off events. [2024-02-05 10:37:36,104 INFO L125 PetriNetUnfolderBase]: For 269/276 co-relation queries the response was YES. [2024-02-05 10:37:36,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5586 conditions, 2774 events. 1519/2774 cut-off events. For 269/276 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18521 event pairs, 489 based on Foata normal form. 25/2746 useless extension candidates. Maximal degree in co-relation 4895. Up to 2105 conditions per place. [2024-02-05 10:37:36,125 INFO L140 encePairwiseOnDemand]: 60/65 looper letters, 50 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2024-02-05 10:37:36,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 77 transitions, 300 flow [2024-02-05 10:37:36,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:37:36,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:37:36,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 164 transitions. [2024-02-05 10:37:36,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-02-05 10:37:36,128 INFO L175 Difference]: Start difference. First operand has 64 places, 55 transitions, 133 flow. Second operand 4 states and 164 transitions. [2024-02-05 10:37:36,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 77 transitions, 300 flow [2024-02-05 10:37:36,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 293 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:37:36,130 INFO L231 Difference]: Finished difference. Result has 67 places, 57 transitions, 156 flow [2024-02-05 10:37:36,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=67, PETRI_TRANSITIONS=57} [2024-02-05 10:37:36,132 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -2 predicate places. [2024-02-05 10:37:36,132 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 57 transitions, 156 flow [2024-02-05 10:37:36,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:36,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:36,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:37:36,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-05 10:37:36,133 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-05 10:37:36,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:36,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1818285662, now seen corresponding path program 1 times [2024-02-05 10:37:36,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:36,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477510990] [2024-02-05 10:37:36,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:36,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:36,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:36,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477510990] [2024-02-05 10:37:36,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477510990] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:37:36,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:37:36,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:37:36,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227961098] [2024-02-05 10:37:36,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:37:36,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:37:36,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:36,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:37:36,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:37:36,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 65 [2024-02-05 10:37:36,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 57 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:36,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:36,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 65 [2024-02-05 10:37:36,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:36,394 INFO L124 PetriNetUnfolderBase]: 714/2010 cut-off events. [2024-02-05 10:37:36,395 INFO L125 PetriNetUnfolderBase]: For 308/308 co-relation queries the response was YES. [2024-02-05 10:37:36,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3556 conditions, 2010 events. 714/2010 cut-off events. For 308/308 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 16411 event pairs, 92 based on Foata normal form. 68/1835 useless extension candidates. Maximal degree in co-relation 3537. Up to 822 conditions per place. [2024-02-05 10:37:36,406 INFO L140 encePairwiseOnDemand]: 61/65 looper letters, 53 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2024-02-05 10:37:36,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 82 transitions, 356 flow [2024-02-05 10:37:36,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:37:36,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:37:36,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 188 transitions. [2024-02-05 10:37:36,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7230769230769231 [2024-02-05 10:37:36,408 INFO L175 Difference]: Start difference. First operand has 67 places, 57 transitions, 156 flow. Second operand 4 states and 188 transitions. [2024-02-05 10:37:36,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 82 transitions, 356 flow [2024-02-05 10:37:36,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 82 transitions, 336 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:37:36,410 INFO L231 Difference]: Finished difference. Result has 66 places, 55 transitions, 148 flow [2024-02-05 10:37:36,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2024-02-05 10:37:36,411 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -3 predicate places. [2024-02-05 10:37:36,411 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 148 flow [2024-02-05 10:37:36,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:36,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:36,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:37:36,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-05 10:37:36,412 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-05 10:37:36,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:36,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1231369463, now seen corresponding path program 1 times [2024-02-05 10:37:36,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:36,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376160828] [2024-02-05 10:37:36,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:36,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:36,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:36,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376160828] [2024-02-05 10:37:36,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376160828] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:37:36,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:37:36,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:37:36,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664877813] [2024-02-05 10:37:36,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:37:36,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-05 10:37:36,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:36,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-05 10:37:36,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-05 10:37:36,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 65 [2024-02-05 10:37:36,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:36,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:36,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 65 [2024-02-05 10:37:36,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:36,771 INFO L124 PetriNetUnfolderBase]: 1747/3159 cut-off events. [2024-02-05 10:37:36,772 INFO L125 PetriNetUnfolderBase]: For 587/597 co-relation queries the response was YES. [2024-02-05 10:37:36,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6675 conditions, 3159 events. 1747/3159 cut-off events. For 587/597 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21436 event pairs, 605 based on Foata normal form. 61/3155 useless extension candidates. Maximal degree in co-relation 5967. Up to 1630 conditions per place. [2024-02-05 10:37:36,786 INFO L140 encePairwiseOnDemand]: 59/65 looper letters, 62 selfloop transitions, 6 changer transitions 0/87 dead transitions. [2024-02-05 10:37:36,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 367 flow [2024-02-05 10:37:36,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:37:36,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:37:36,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 200 transitions. [2024-02-05 10:37:36,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-02-05 10:37:36,788 INFO L175 Difference]: Start difference. First operand has 66 places, 55 transitions, 148 flow. Second operand 5 states and 200 transitions. [2024-02-05 10:37:36,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 367 flow [2024-02-05 10:37:36,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 87 transitions, 358 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:37:36,790 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 169 flow [2024-02-05 10:37:36,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=169, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2024-02-05 10:37:36,791 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 0 predicate places. [2024-02-05 10:37:36,791 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 169 flow [2024-02-05 10:37:36,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:36,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:36,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:37:36,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-05 10:37:36,792 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-05 10:37:36,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:36,792 INFO L85 PathProgramCache]: Analyzing trace with hash 583064692, now seen corresponding path program 1 times [2024-02-05 10:37:36,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:36,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577696918] [2024-02-05 10:37:36,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:36,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:36,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:36,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577696918] [2024-02-05 10:37:36,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577696918] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:37:36,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:37:36,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:37:36,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309154649] [2024-02-05 10:37:36,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:37:36,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:37:36,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:36,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:37:36,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:37:36,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 65 [2024-02-05 10:37:36,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:36,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:36,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 65 [2024-02-05 10:37:36,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:37,100 INFO L124 PetriNetUnfolderBase]: 1819/3216 cut-off events. [2024-02-05 10:37:37,101 INFO L125 PetriNetUnfolderBase]: For 1101/1144 co-relation queries the response was YES. [2024-02-05 10:37:37,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6929 conditions, 3216 events. 1819/3216 cut-off events. For 1101/1144 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21671 event pairs, 571 based on Foata normal form. 23/3183 useless extension candidates. Maximal degree in co-relation 6908. Up to 2557 conditions per place. [2024-02-05 10:37:37,116 INFO L140 encePairwiseOnDemand]: 60/65 looper letters, 49 selfloop transitions, 6 changer transitions 0/75 dead transitions. [2024-02-05 10:37:37,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 75 transitions, 331 flow [2024-02-05 10:37:37,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:37:37,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:37:37,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 162 transitions. [2024-02-05 10:37:37,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6230769230769231 [2024-02-05 10:37:37,118 INFO L175 Difference]: Start difference. First operand has 69 places, 55 transitions, 169 flow. Second operand 4 states and 162 transitions. [2024-02-05 10:37:37,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 75 transitions, 331 flow [2024-02-05 10:37:37,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 75 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:37:37,121 INFO L231 Difference]: Finished difference. Result has 72 places, 57 transitions, 195 flow [2024-02-05 10:37:37,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=195, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2024-02-05 10:37:37,122 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 3 predicate places. [2024-02-05 10:37:37,122 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 195 flow [2024-02-05 10:37:37,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:37,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:37,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:37:37,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-05 10:37:37,123 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-05 10:37:37,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:37,123 INFO L85 PathProgramCache]: Analyzing trace with hash 895136584, now seen corresponding path program 1 times [2024-02-05 10:37:37,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:37,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762460975] [2024-02-05 10:37:37,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:37,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:37,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:37,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762460975] [2024-02-05 10:37:37,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762460975] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:37:37,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:37:37,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:37:37,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197227284] [2024-02-05 10:37:37,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:37:37,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-05 10:37:37,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:37,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-05 10:37:37,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-05 10:37:37,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 65 [2024-02-05 10:37:37,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 57 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:37,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:37,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 65 [2024-02-05 10:37:37,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:37,466 INFO L124 PetriNetUnfolderBase]: 1819/3148 cut-off events. [2024-02-05 10:37:37,467 INFO L125 PetriNetUnfolderBase]: For 1245/1288 co-relation queries the response was YES. [2024-02-05 10:37:37,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7183 conditions, 3148 events. 1819/3148 cut-off events. For 1245/1288 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20683 event pairs, 341 based on Foata normal form. 3/3096 useless extension candidates. Maximal degree in co-relation 7159. Up to 1548 conditions per place. [2024-02-05 10:37:37,481 INFO L140 encePairwiseOnDemand]: 60/65 looper letters, 61 selfloop transitions, 7 changer transitions 0/87 dead transitions. [2024-02-05 10:37:37,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 87 transitions, 402 flow [2024-02-05 10:37:37,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:37:37,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:37:37,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 197 transitions. [2024-02-05 10:37:37,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6061538461538462 [2024-02-05 10:37:37,483 INFO L175 Difference]: Start difference. First operand has 72 places, 57 transitions, 195 flow. Second operand 5 states and 197 transitions. [2024-02-05 10:37:37,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 87 transitions, 402 flow [2024-02-05 10:37:37,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 87 transitions, 397 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:37:37,486 INFO L231 Difference]: Finished difference. Result has 74 places, 56 transitions, 202 flow [2024-02-05 10:37:37,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=74, PETRI_TRANSITIONS=56} [2024-02-05 10:37:37,487 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 5 predicate places. [2024-02-05 10:37:37,487 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 56 transitions, 202 flow [2024-02-05 10:37:37,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:37,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:37,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:37:37,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-05 10:37:37,488 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-05 10:37:37,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:37,489 INFO L85 PathProgramCache]: Analyzing trace with hash 420941256, now seen corresponding path program 1 times [2024-02-05 10:37:37,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:37,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167257598] [2024-02-05 10:37:37,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:37,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:37,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:37,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167257598] [2024-02-05 10:37:37,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167257598] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:37:37,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:37:37,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:37:37,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299682807] [2024-02-05 10:37:37,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:37:37,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:37:37,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:37,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:37:37,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:37:37,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 65 [2024-02-05 10:37:37,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 56 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:37,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:37,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 65 [2024-02-05 10:37:37,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:37,893 INFO L124 PetriNetUnfolderBase]: 2751/4676 cut-off events. [2024-02-05 10:37:37,893 INFO L125 PetriNetUnfolderBase]: For 2489/2555 co-relation queries the response was YES. [2024-02-05 10:37:37,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10592 conditions, 4676 events. 2751/4676 cut-off events. For 2489/2555 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 30246 event pairs, 925 based on Foata normal form. 0/4436 useless extension candidates. Maximal degree in co-relation 10567. Up to 3991 conditions per place. [2024-02-05 10:37:37,912 INFO L140 encePairwiseOnDemand]: 59/65 looper letters, 50 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2024-02-05 10:37:37,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 77 transitions, 404 flow [2024-02-05 10:37:37,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:37:37,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:37:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2024-02-05 10:37:37,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884615384615385 [2024-02-05 10:37:37,914 INFO L175 Difference]: Start difference. First operand has 74 places, 56 transitions, 202 flow. Second operand 4 states and 153 transitions. [2024-02-05 10:37:37,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 77 transitions, 404 flow [2024-02-05 10:37:37,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 77 transitions, 393 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:37:37,917 INFO L231 Difference]: Finished difference. Result has 77 places, 61 transitions, 274 flow [2024-02-05 10:37:37,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=274, PETRI_PLACES=77, PETRI_TRANSITIONS=61} [2024-02-05 10:37:37,917 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 8 predicate places. [2024-02-05 10:37:37,917 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 61 transitions, 274 flow [2024-02-05 10:37:37,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:37,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:37,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:37:37,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-05 10:37:37,918 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-05 10:37:37,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:37,919 INFO L85 PathProgramCache]: Analyzing trace with hash -319325742, now seen corresponding path program 1 times [2024-02-05 10:37:37,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:37,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234666358] [2024-02-05 10:37:37,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:37,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:37,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:37,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234666358] [2024-02-05 10:37:37,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234666358] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:37:37,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:37:37,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:37:37,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735546685] [2024-02-05 10:37:37,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:37:37,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:37:37,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:37,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:37:37,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:37:37,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 65 [2024-02-05 10:37:37,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 61 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:37,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:37,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 65 [2024-02-05 10:37:37,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:38,097 INFO L124 PetriNetUnfolderBase]: 484/1508 cut-off events. [2024-02-05 10:37:38,098 INFO L125 PetriNetUnfolderBase]: For 728/728 co-relation queries the response was YES. [2024-02-05 10:37:38,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3107 conditions, 1508 events. 484/1508 cut-off events. For 728/728 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 11608 event pairs, 176 based on Foata normal form. 100/1554 useless extension candidates. Maximal degree in co-relation 3079. Up to 472 conditions per place. [2024-02-05 10:37:38,103 INFO L140 encePairwiseOnDemand]: 59/65 looper letters, 39 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2024-02-05 10:37:38,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 393 flow [2024-02-05 10:37:38,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:37:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:37:38,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 153 transitions. [2024-02-05 10:37:38,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7846153846153846 [2024-02-05 10:37:38,104 INFO L175 Difference]: Start difference. First operand has 77 places, 61 transitions, 274 flow. Second operand 3 states and 153 transitions. [2024-02-05 10:37:38,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 393 flow [2024-02-05 10:37:38,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 73 transitions, 384 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:37:38,107 INFO L231 Difference]: Finished difference. Result has 78 places, 61 transitions, 277 flow [2024-02-05 10:37:38,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=277, PETRI_PLACES=78, PETRI_TRANSITIONS=61} [2024-02-05 10:37:38,108 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 9 predicate places. [2024-02-05 10:37:38,108 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 61 transitions, 277 flow [2024-02-05 10:37:38,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:38,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:38,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:37:38,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-05 10:37:38,109 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-05 10:37:38,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:38,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1123170547, now seen corresponding path program 1 times [2024-02-05 10:37:38,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:38,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647786288] [2024-02-05 10:37:38,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:38,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:38,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:38,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647786288] [2024-02-05 10:37:38,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647786288] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:37:38,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:37:38,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:37:38,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260616545] [2024-02-05 10:37:38,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:37:38,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:37:38,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:38,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:37:38,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:37:38,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 65 [2024-02-05 10:37:38,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 61 transitions, 277 flow. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 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) [2024-02-05 10:37:38,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:38,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 65 [2024-02-05 10:37:38,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:38,376 INFO L124 PetriNetUnfolderBase]: 1024/2236 cut-off events. [2024-02-05 10:37:38,376 INFO L125 PetriNetUnfolderBase]: For 1328/1341 co-relation queries the response was YES. [2024-02-05 10:37:38,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5391 conditions, 2236 events. 1024/2236 cut-off events. For 1328/1341 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15698 event pairs, 411 based on Foata normal form. 34/2238 useless extension candidates. Maximal degree in co-relation 5363. Up to 1041 conditions per place. [2024-02-05 10:37:38,386 INFO L140 encePairwiseOnDemand]: 58/65 looper letters, 59 selfloop transitions, 12 changer transitions 0/91 dead transitions. [2024-02-05 10:37:38,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 91 transitions, 511 flow [2024-02-05 10:37:38,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:37:38,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:37:38,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 180 transitions. [2024-02-05 10:37:38,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6923076923076923 [2024-02-05 10:37:38,388 INFO L175 Difference]: Start difference. First operand has 78 places, 61 transitions, 277 flow. Second operand 4 states and 180 transitions. [2024-02-05 10:37:38,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 91 transitions, 511 flow [2024-02-05 10:37:38,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 91 transitions, 496 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:37:38,391 INFO L231 Difference]: Finished difference. Result has 82 places, 65 transitions, 341 flow [2024-02-05 10:37:38,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=341, PETRI_PLACES=82, PETRI_TRANSITIONS=65} [2024-02-05 10:37:38,392 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 13 predicate places. [2024-02-05 10:37:38,392 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 65 transitions, 341 flow [2024-02-05 10:37:38,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 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) [2024-02-05 10:37:38,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:38,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:37:38,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-05 10:37:38,393 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-05 10:37:38,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:38,393 INFO L85 PathProgramCache]: Analyzing trace with hash -22321037, now seen corresponding path program 2 times [2024-02-05 10:37:38,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:38,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411999789] [2024-02-05 10:37:38,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:38,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:38,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:38,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411999789] [2024-02-05 10:37:38,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411999789] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:37:38,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:37:38,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:37:38,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810982259] [2024-02-05 10:37:38,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:37:38,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:37:38,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:38,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:37:38,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:37:38,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 65 [2024-02-05 10:37:38,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 65 transitions, 341 flow. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 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) [2024-02-05 10:37:38,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:38,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 65 [2024-02-05 10:37:38,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:38,667 INFO L124 PetriNetUnfolderBase]: 1054/2378 cut-off events. [2024-02-05 10:37:38,667 INFO L125 PetriNetUnfolderBase]: For 2426/2444 co-relation queries the response was YES. [2024-02-05 10:37:38,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5841 conditions, 2378 events. 1054/2378 cut-off events. For 2426/2444 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 17121 event pairs, 251 based on Foata normal form. 30/2370 useless extension candidates. Maximal degree in co-relation 5810. Up to 1199 conditions per place. [2024-02-05 10:37:38,676 INFO L140 encePairwiseOnDemand]: 61/65 looper letters, 58 selfloop transitions, 10 changer transitions 2/90 dead transitions. [2024-02-05 10:37:38,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 90 transitions, 556 flow [2024-02-05 10:37:38,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:37:38,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:37:38,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 176 transitions. [2024-02-05 10:37:38,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.676923076923077 [2024-02-05 10:37:38,677 INFO L175 Difference]: Start difference. First operand has 82 places, 65 transitions, 341 flow. Second operand 4 states and 176 transitions. [2024-02-05 10:37:38,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 90 transitions, 556 flow [2024-02-05 10:37:38,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 90 transitions, 537 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-05 10:37:38,684 INFO L231 Difference]: Finished difference. Result has 82 places, 65 transitions, 352 flow [2024-02-05 10:37:38,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=352, PETRI_PLACES=82, PETRI_TRANSITIONS=65} [2024-02-05 10:37:38,685 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 13 predicate places. [2024-02-05 10:37:38,685 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 65 transitions, 352 flow [2024-02-05 10:37:38,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 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) [2024-02-05 10:37:38,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:38,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:37:38,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-05 10:37:38,685 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-05 10:37:38,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:38,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1405220373, now seen corresponding path program 1 times [2024-02-05 10:37:38,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:38,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404373799] [2024-02-05 10:37:38,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:38,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:38,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:38,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:38,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404373799] [2024-02-05 10:37:38,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404373799] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:37:38,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:37:38,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:37:38,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829783809] [2024-02-05 10:37:38,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:37:38,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:37:38,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:38,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:37:38,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:37:38,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 65 [2024-02-05 10:37:38,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 65 transitions, 352 flow. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:38,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:38,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 65 [2024-02-05 10:37:38,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:39,007 INFO L124 PetriNetUnfolderBase]: 1242/2811 cut-off events. [2024-02-05 10:37:39,007 INFO L125 PetriNetUnfolderBase]: For 2751/2762 co-relation queries the response was YES. [2024-02-05 10:37:39,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6894 conditions, 2811 events. 1242/2811 cut-off events. For 2751/2762 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 20831 event pairs, 354 based on Foata normal form. 20/2767 useless extension candidates. Maximal degree in co-relation 6152. Up to 852 conditions per place. [2024-02-05 10:37:39,016 INFO L140 encePairwiseOnDemand]: 59/65 looper letters, 59 selfloop transitions, 12 changer transitions 7/96 dead transitions. [2024-02-05 10:37:39,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 96 transitions, 595 flow [2024-02-05 10:37:39,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:37:39,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:37:39,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 177 transitions. [2024-02-05 10:37:39,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6807692307692308 [2024-02-05 10:37:39,017 INFO L175 Difference]: Start difference. First operand has 82 places, 65 transitions, 352 flow. Second operand 4 states and 177 transitions. [2024-02-05 10:37:39,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 96 transitions, 595 flow [2024-02-05 10:37:39,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 96 transitions, 567 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-02-05 10:37:39,021 INFO L231 Difference]: Finished difference. Result has 82 places, 63 transitions, 368 flow [2024-02-05 10:37:39,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=368, PETRI_PLACES=82, PETRI_TRANSITIONS=63} [2024-02-05 10:37:39,022 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 13 predicate places. [2024-02-05 10:37:39,022 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 63 transitions, 368 flow [2024-02-05 10:37:39,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:39,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:39,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:37:39,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-05 10:37:39,023 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-05 10:37:39,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:39,023 INFO L85 PathProgramCache]: Analyzing trace with hash -311079425, now seen corresponding path program 1 times [2024-02-05 10:37:39,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:39,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195946022] [2024-02-05 10:37:39,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:39,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:39,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:39,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195946022] [2024-02-05 10:37:39,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195946022] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:37:39,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:37:39,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:37:39,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427833212] [2024-02-05 10:37:39,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:37:39,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:37:39,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:39,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:37:39,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:37:39,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 65 [2024-02-05 10:37:39,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 63 transitions, 368 flow. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:39,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:39,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 65 [2024-02-05 10:37:39,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:39,484 INFO L124 PetriNetUnfolderBase]: 1383/2944 cut-off events. [2024-02-05 10:37:39,498 INFO L125 PetriNetUnfolderBase]: For 3339/3349 co-relation queries the response was YES. [2024-02-05 10:37:39,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7709 conditions, 2944 events. 1383/2944 cut-off events. For 3339/3349 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 21097 event pairs, 273 based on Foata normal form. 56/2991 useless extension candidates. Maximal degree in co-relation 7681. Up to 1313 conditions per place. [2024-02-05 10:37:39,511 INFO L140 encePairwiseOnDemand]: 60/65 looper letters, 67 selfloop transitions, 10 changer transitions 4/96 dead transitions. [2024-02-05 10:37:39,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 96 transitions, 668 flow [2024-02-05 10:37:39,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:37:39,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:37:39,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 171 transitions. [2024-02-05 10:37:39,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6576923076923077 [2024-02-05 10:37:39,525 INFO L175 Difference]: Start difference. First operand has 82 places, 63 transitions, 368 flow. Second operand 4 states and 171 transitions. [2024-02-05 10:37:39,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 96 transitions, 668 flow [2024-02-05 10:37:39,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 96 transitions, 662 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-02-05 10:37:39,531 INFO L231 Difference]: Finished difference. Result has 83 places, 63 transitions, 398 flow [2024-02-05 10:37:39,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=398, PETRI_PLACES=83, PETRI_TRANSITIONS=63} [2024-02-05 10:37:39,532 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 14 predicate places. [2024-02-05 10:37:39,532 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 63 transitions, 398 flow [2024-02-05 10:37:39,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:39,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:39,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:37:39,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-02-05 10:37:39,533 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-05 10:37:39,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:39,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1840434139, now seen corresponding path program 2 times [2024-02-05 10:37:39,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:39,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895518191] [2024-02-05 10:37:39,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:39,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:39,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:39,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895518191] [2024-02-05 10:37:39,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895518191] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:37:39,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:37:39,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:37:39,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119798054] [2024-02-05 10:37:39,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:37:39,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:37:39,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:39,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:37:39,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:37:39,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 65 [2024-02-05 10:37:39,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 63 transitions, 398 flow. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:39,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:39,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 65 [2024-02-05 10:37:39,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:39,926 INFO L124 PetriNetUnfolderBase]: 1537/3354 cut-off events. [2024-02-05 10:37:39,926 INFO L125 PetriNetUnfolderBase]: For 5523/5535 co-relation queries the response was YES. [2024-02-05 10:37:39,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9254 conditions, 3354 events. 1537/3354 cut-off events. For 5523/5535 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 25450 event pairs, 647 based on Foata normal form. 56/3381 useless extension candidates. Maximal degree in co-relation 9224. Up to 1258 conditions per place. [2024-02-05 10:37:39,948 INFO L140 encePairwiseOnDemand]: 58/65 looper letters, 75 selfloop transitions, 17 changer transitions 0/107 dead transitions. [2024-02-05 10:37:39,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 107 transitions, 820 flow [2024-02-05 10:37:39,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:37:39,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:37:39,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 171 transitions. [2024-02-05 10:37:39,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6576923076923077 [2024-02-05 10:37:39,949 INFO L175 Difference]: Start difference. First operand has 83 places, 63 transitions, 398 flow. Second operand 4 states and 171 transitions. [2024-02-05 10:37:39,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 107 transitions, 820 flow [2024-02-05 10:37:39,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 107 transitions, 802 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-02-05 10:37:39,959 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 545 flow [2024-02-05 10:37:39,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=545, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2024-02-05 10:37:39,960 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 13 predicate places. [2024-02-05 10:37:39,960 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 545 flow [2024-02-05 10:37:39,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:39,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:39,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:37:39,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-02-05 10:37:39,960 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-05 10:37:39,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:39,961 INFO L85 PathProgramCache]: Analyzing trace with hash -991029077, now seen corresponding path program 1 times [2024-02-05 10:37:39,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:39,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43874949] [2024-02-05 10:37:39,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:39,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:40,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:40,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43874949] [2024-02-05 10:37:40,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43874949] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:37:40,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:37:40,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:37:40,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334461610] [2024-02-05 10:37:40,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:37:40,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-05 10:37:40,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:40,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-05 10:37:40,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-05 10:37:40,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 65 [2024-02-05 10:37:40,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 545 flow. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:40,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:40,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 65 [2024-02-05 10:37:40,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:40,384 INFO L124 PetriNetUnfolderBase]: 1745/3524 cut-off events. [2024-02-05 10:37:40,384 INFO L125 PetriNetUnfolderBase]: For 6154/6176 co-relation queries the response was YES. [2024-02-05 10:37:40,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10303 conditions, 3524 events. 1745/3524 cut-off events. For 6154/6176 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 25314 event pairs, 283 based on Foata normal form. 120/3635 useless extension candidates. Maximal degree in co-relation 10274. Up to 1446 conditions per place. [2024-02-05 10:37:40,397 INFO L140 encePairwiseOnDemand]: 58/65 looper letters, 84 selfloop transitions, 11 changer transitions 4/111 dead transitions. [2024-02-05 10:37:40,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 111 transitions, 909 flow [2024-02-05 10:37:40,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:37:40,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:37:40,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 190 transitions. [2024-02-05 10:37:40,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846153846153846 [2024-02-05 10:37:40,398 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 545 flow. Second operand 5 states and 190 transitions. [2024-02-05 10:37:40,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 111 transitions, 909 flow [2024-02-05 10:37:40,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 111 transitions, 902 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:37:40,405 INFO L231 Difference]: Finished difference. Result has 83 places, 71 transitions, 554 flow [2024-02-05 10:37:40,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=554, PETRI_PLACES=83, PETRI_TRANSITIONS=71} [2024-02-05 10:37:40,406 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 14 predicate places. [2024-02-05 10:37:40,406 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 71 transitions, 554 flow [2024-02-05 10:37:40,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:40,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:40,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:37:40,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-02-05 10:37:40,407 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-05 10:37:40,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:40,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1702112306, now seen corresponding path program 1 times [2024-02-05 10:37:40,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:40,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499856449] [2024-02-05 10:37:40,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:40,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:40,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:40,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499856449] [2024-02-05 10:37:40,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499856449] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:37:40,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:37:40,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:37:40,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621182898] [2024-02-05 10:37:40,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:37:40,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-05 10:37:40,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:40,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-05 10:37:40,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-05 10:37:40,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 65 [2024-02-05 10:37:40,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 71 transitions, 554 flow. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:40,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:40,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 65 [2024-02-05 10:37:40,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:40,767 INFO L124 PetriNetUnfolderBase]: 1642/3345 cut-off events. [2024-02-05 10:37:40,768 INFO L125 PetriNetUnfolderBase]: For 6635/6651 co-relation queries the response was YES. [2024-02-05 10:37:40,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10224 conditions, 3345 events. 1642/3345 cut-off events. For 6635/6651 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 23995 event pairs, 338 based on Foata normal form. 72/3408 useless extension candidates. Maximal degree in co-relation 10196. Up to 1193 conditions per place. [2024-02-05 10:37:40,782 INFO L140 encePairwiseOnDemand]: 59/65 looper letters, 76 selfloop transitions, 22 changer transitions 2/112 dead transitions. [2024-02-05 10:37:40,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 112 transitions, 938 flow [2024-02-05 10:37:40,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:37:40,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:37:40,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 192 transitions. [2024-02-05 10:37:40,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5907692307692308 [2024-02-05 10:37:40,784 INFO L175 Difference]: Start difference. First operand has 83 places, 71 transitions, 554 flow. Second operand 5 states and 192 transitions. [2024-02-05 10:37:40,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 112 transitions, 938 flow [2024-02-05 10:37:40,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 112 transitions, 920 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:37:40,791 INFO L231 Difference]: Finished difference. Result has 83 places, 74 transitions, 656 flow [2024-02-05 10:37:40,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=656, PETRI_PLACES=83, PETRI_TRANSITIONS=74} [2024-02-05 10:37:40,792 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 14 predicate places. [2024-02-05 10:37:40,792 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 74 transitions, 656 flow [2024-02-05 10:37:40,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:40,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:40,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:37:40,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-02-05 10:37:40,793 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-05 10:37:40,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:40,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1225873599, now seen corresponding path program 1 times [2024-02-05 10:37:40,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:40,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739603576] [2024-02-05 10:37:40,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:40,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:40,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:40,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739603576] [2024-02-05 10:37:40,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739603576] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:37:40,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:37:40,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:37:40,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068397888] [2024-02-05 10:37:40,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:37:40,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:37:40,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:40,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:37:40,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:37:40,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 65 [2024-02-05 10:37:40,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 74 transitions, 656 flow. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:40,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:40,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 65 [2024-02-05 10:37:40,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:41,028 INFO L124 PetriNetUnfolderBase]: 951/2208 cut-off events. [2024-02-05 10:37:41,028 INFO L125 PetriNetUnfolderBase]: For 7158/7215 co-relation queries the response was YES. [2024-02-05 10:37:41,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6839 conditions, 2208 events. 951/2208 cut-off events. For 7158/7215 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16118 event pairs, 343 based on Foata normal form. 69/2260 useless extension candidates. Maximal degree in co-relation 6810. Up to 1254 conditions per place. [2024-02-05 10:37:41,036 INFO L140 encePairwiseOnDemand]: 61/65 looper letters, 50 selfloop transitions, 18 changer transitions 2/87 dead transitions. [2024-02-05 10:37:41,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 87 transitions, 785 flow [2024-02-05 10:37:41,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:37:41,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:37:41,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 174 transitions. [2024-02-05 10:37:41,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6692307692307692 [2024-02-05 10:37:41,037 INFO L175 Difference]: Start difference. First operand has 83 places, 74 transitions, 656 flow. Second operand 4 states and 174 transitions. [2024-02-05 10:37:41,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 87 transitions, 785 flow [2024-02-05 10:37:41,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 87 transitions, 734 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-02-05 10:37:41,042 INFO L231 Difference]: Finished difference. Result has 83 places, 69 transitions, 572 flow [2024-02-05 10:37:41,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=572, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2024-02-05 10:37:41,042 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 14 predicate places. [2024-02-05 10:37:41,042 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 572 flow [2024-02-05 10:37:41,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:41,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:41,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:37:41,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-02-05 10:37:41,043 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-05 10:37:41,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:41,044 INFO L85 PathProgramCache]: Analyzing trace with hash -379328288, now seen corresponding path program 1 times [2024-02-05 10:37:41,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:41,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305545287] [2024-02-05 10:37:41,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:41,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:41,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:41,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305545287] [2024-02-05 10:37:41,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305545287] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:37:41,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:37:41,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:37:41,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273624567] [2024-02-05 10:37:41,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:37:41,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:37:41,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:41,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:37:41,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:37:41,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 65 [2024-02-05 10:37:41,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 572 flow. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:41,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:41,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 65 [2024-02-05 10:37:41,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:41,259 INFO L124 PetriNetUnfolderBase]: 931/2208 cut-off events. [2024-02-05 10:37:41,259 INFO L125 PetriNetUnfolderBase]: For 5310/5364 co-relation queries the response was YES. [2024-02-05 10:37:41,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6697 conditions, 2208 events. 931/2208 cut-off events. For 5310/5364 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16252 event pairs, 301 based on Foata normal form. 39/2224 useless extension candidates. Maximal degree in co-relation 6668. Up to 1000 conditions per place. [2024-02-05 10:37:41,269 INFO L140 encePairwiseOnDemand]: 61/65 looper letters, 50 selfloop transitions, 22 changer transitions 2/91 dead transitions. [2024-02-05 10:37:41,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 91 transitions, 792 flow [2024-02-05 10:37:41,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:37:41,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:37:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 169 transitions. [2024-02-05 10:37:41,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-02-05 10:37:41,271 INFO L175 Difference]: Start difference. First operand has 83 places, 69 transitions, 572 flow. Second operand 4 states and 169 transitions. [2024-02-05 10:37:41,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 91 transitions, 792 flow [2024-02-05 10:37:41,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 91 transitions, 751 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-02-05 10:37:41,275 INFO L231 Difference]: Finished difference. Result has 84 places, 69 transitions, 600 flow [2024-02-05 10:37:41,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=600, PETRI_PLACES=84, PETRI_TRANSITIONS=69} [2024-02-05 10:37:41,276 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 15 predicate places. [2024-02-05 10:37:41,276 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 69 transitions, 600 flow [2024-02-05 10:37:41,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:41,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:41,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:37:41,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-02-05 10:37:41,277 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-05 10:37:41,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:41,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1820982657, now seen corresponding path program 1 times [2024-02-05 10:37:41,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:41,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505999111] [2024-02-05 10:37:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:41,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-05 10:37:41,291 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-05 10:37:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-05 10:37:41,326 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-05 10:37:41,326 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-05 10:37:41,327 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location thread3Err3ASSERT_VIOLATIONERROR_FUNCTION (32 of 33 remaining) [2024-02-05 10:37:41,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 33 remaining) [2024-02-05 10:37:41,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 33 remaining) [2024-02-05 10:37:41,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 33 remaining) [2024-02-05 10:37:41,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 33 remaining) [2024-02-05 10:37:41,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 33 remaining) [2024-02-05 10:37:41,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 33 remaining) [2024-02-05 10:37:41,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 33 remaining) [2024-02-05 10:37:41,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 33 remaining) [2024-02-05 10:37:41,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 33 remaining) [2024-02-05 10:37:41,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 33 remaining) [2024-02-05 10:37:41,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err2ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 33 remaining) [2024-02-05 10:37:41,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err4ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 33 remaining) [2024-02-05 10:37:41,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err3ASSERT_VIOLATIONERROR_FUNCTION (19 of 33 remaining) [2024-02-05 10:37:41,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err5ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 33 remaining) [2024-02-05 10:37:41,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 33 remaining) [2024-02-05 10:37:41,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 33 remaining) [2024-02-05 10:37:41,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 33 remaining) [2024-02-05 10:37:41,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 33 remaining) [2024-02-05 10:37:41,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 33 remaining) [2024-02-05 10:37:41,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 33 remaining) [2024-02-05 10:37:41,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 33 remaining) [2024-02-05 10:37:41,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 33 remaining) [2024-02-05 10:37:41,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 33 remaining) [2024-02-05 10:37:41,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 33 remaining) [2024-02-05 10:37:41,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 33 remaining) [2024-02-05 10:37:41,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 33 remaining) [2024-02-05 10:37:41,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 33 remaining) [2024-02-05 10:37:41,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 33 remaining) [2024-02-05 10:37:41,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 33 remaining) [2024-02-05 10:37:41,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err2ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 33 remaining) [2024-02-05 10:37:41,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err4ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 33 remaining) [2024-02-05 10:37:41,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err5ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 33 remaining) [2024-02-05 10:37:41,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-02-05 10:37:41,334 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:37:41,338 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-02-05 10:37:41,339 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-02-05 10:37:41,363 INFO L503 ceAbstractionStarter]: Automizer considered 15 witness invariants [2024-02-05 10:37:41,364 INFO L504 ceAbstractionStarter]: WitnessConsidered=15 [2024-02-05 10:37:41,364 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.02 10:37:41 BasicIcfg [2024-02-05 10:37:41,364 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-02-05 10:37:41,365 INFO L158 Benchmark]: Toolchain (without parser) took 8269.29ms. Allocated memory was 140.5MB in the beginning and 551.6MB in the end (delta: 411.0MB). Free memory was 65.9MB in the beginning and 333.4MB in the end (delta: -267.5MB). Peak memory consumption was 145.6MB. Max. memory is 16.1GB. [2024-02-05 10:37:41,365 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 140.5MB. Free memory is still 95.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-05 10:37:41,365 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 140.5MB. Free memory was 112.1MB in the beginning and 112.0MB in the end (delta: 112.1kB). There was no memory consumed. Max. memory is 16.1GB. [2024-02-05 10:37:41,365 INFO L158 Benchmark]: CACSL2BoogieTranslator took 494.95ms. Allocated memory is still 140.5MB. Free memory was 65.7MB in the beginning and 90.8MB in the end (delta: -25.1MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. [2024-02-05 10:37:41,365 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.20ms. Allocated memory is still 140.5MB. Free memory was 90.8MB in the beginning and 88.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-05 10:37:41,366 INFO L158 Benchmark]: Boogie Preprocessor took 39.83ms. Allocated memory is still 140.5MB. Free memory was 88.7MB in the beginning and 85.9MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-05 10:37:41,366 INFO L158 Benchmark]: RCFGBuilder took 494.65ms. Allocated memory is still 140.5MB. Free memory was 85.9MB in the beginning and 58.0MB in the end (delta: 28.0MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-02-05 10:37:41,366 INFO L158 Benchmark]: TraceAbstraction took 7195.65ms. Allocated memory was 140.5MB in the beginning and 551.6MB in the end (delta: 411.0MB). Free memory was 57.3MB in the beginning and 333.4MB in the end (delta: -276.1MB). Peak memory consumption was 134.6MB. Max. memory is 16.1GB. [2024-02-05 10:37:41,367 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.16ms. Allocated memory is still 140.5MB. Free memory is still 95.7MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.13ms. Allocated memory is still 140.5MB. Free memory was 112.1MB in the beginning and 112.0MB in the end (delta: 112.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 494.95ms. Allocated memory is still 140.5MB. Free memory was 65.7MB in the beginning and 90.8MB in the end (delta: -25.1MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.20ms. Allocated memory is still 140.5MB. Free memory was 90.8MB in the beginning and 88.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.83ms. Allocated memory is still 140.5MB. Free memory was 88.7MB in the beginning and 85.9MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 494.65ms. Allocated memory is still 140.5MB. Free memory was 85.9MB in the beginning and 58.0MB in the end (delta: 28.0MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * TraceAbstraction took 7195.65ms. Allocated memory was 140.5MB in the beginning and 551.6MB in the end (delta: 411.0MB). Free memory was 57.3MB in the beginning and 333.4MB in the end (delta: -276.1MB). Peak memory consumption was 134.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L702] 0 pthread_mutex_t mutex; [L702] 0 pthread_mutex_t mutex; [L702] 0 pthread_mutex_t mutex; [L702] 0 pthread_mutex_t mutex; [L702] 0 pthread_mutex_t mutex; [L702] 0 pthread_mutex_t mutex; [L703] 0 int data = 0; [L730] 0 CodeAnnotStmt[Assertion[BinaryExpression[COMPEQ,IdentifierExpression[data],IntegerLiteral[0]]]] [L731] 0 pthread_t t1, t2, t3; VAL [data=0, mutex={3:0}, t1={7:0}, t2={5:0}, t3={6:0}] [L732] 0 CodeAnnotStmt[Assertion[BinaryExpression[COMPEQ,IdentifierExpression[data],IntegerLiteral[0]]]] [L732] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [arg={0:0}, data=0, mutex={3:0}, t1={7:0}, t2={5:0}, t3={6:0}] [L706] 1 CodeAnnotStmt[Assertion[BinaryExpression[COMPEQ,CastExpression[ACSLType[unsigned long],IdentifierExpression[arg]],IntegerLiteral[0UL]]]] VAL [arg={0:0}, arg={0:0}, data=0, mutex={3:0}] [L733] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [arg={0:0}, arg={0:0}, arg={0:0}, data=0, mutex={3:0}, t1={7:0}, t2={5:0}, t3={6:0}] [L734] FCALL, FORK 0 pthread_create(&t3, 0, thread3, 0) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=0, mutex={3:0}, t1={7:0}, t2={5:0}, t3={6:0}] [L713] 2 CodeAnnotStmt[Assertion[BinaryExpression[COMPEQ,CastExpression[ACSLType[unsigned long],IdentifierExpression[arg]],IntegerLiteral[0UL]]]] VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=0, mutex={3:0}] [L720] 3 CodeAnnotStmt[Assertion[BinaryExpression[COMPEQ,CastExpression[ACSLType[unsigned long],IdentifierExpression[arg]],IntegerLiteral[0UL]]]] VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=0, mutex={3:0}] [L707] 1 CodeAnnotStmt[Assertion[BinaryExpression[LOGICAND,BinaryExpression[COMPLEQ,IntegerLiteral[0],IdentifierExpression[data]],BinaryExpression[COMPEQ,CastExpression[ACSLType[unsigned long],IdentifierExpression[arg]],IntegerLiteral[0UL]]]]] [L707] 1 data++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=1, mutex={3:0}] [L708] 1 CodeAnnotStmt[Assertion[BinaryExpression[LOGICAND,BinaryExpression[COMPLEQ,IntegerLiteral[1],IdentifierExpression[data]],BinaryExpression[COMPEQ,CastExpression[ACSLType[unsigned long],IdentifierExpression[arg]],IntegerLiteral[0UL]]]]] VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=1, mutex={3:0}] [L714] 2 CodeAnnotStmt[Assertion[BinaryExpression[LOGICAND,BinaryExpression[COMPLEQ,IntegerLiteral[0],IdentifierExpression[data]],BinaryExpression[COMPEQ,CastExpression[ACSLType[unsigned long],IdentifierExpression[arg]],IntegerLiteral[0UL]]]]] [L714] 2 data+=2 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=3, mutex={3:0}] [L715] 2 CodeAnnotStmt[Assertion[BinaryExpression[LOGICAND,BinaryExpression[COMPLEQ,IntegerLiteral[2],IdentifierExpression[data]],BinaryExpression[COMPEQ,CastExpression[ACSLType[unsigned long],IdentifierExpression[arg]],IntegerLiteral[0UL]]]]] VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=3, mutex={3:0}] [L721] 3 CodeAnnotStmt[Assertion[BinaryExpression[LOGICAND,BinaryExpression[COMPLEQ,IntegerLiteral[0],IdentifierExpression[data]],BinaryExpression[COMPEQ,CastExpression[ACSLType[unsigned long],IdentifierExpression[arg]],IntegerLiteral[0UL]]]]] VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=3, mutex={3:0}] [L721] COND TRUE 3 data >= 3 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=3, mutex={3:0}] [L722] 3 CodeAnnotStmt[Assertion[BinaryExpression[LOGICAND,BinaryExpression[LOGICAND,BinaryExpression[COMPLEQ,IntegerLiteral[3],IdentifierExpression[data]],BinaryExpression[COMPEQ,CastExpression[ACSLType[unsigned long],IdentifierExpression[arg]],IntegerLiteral[0UL]]],BinaryExpression[COMPNEQ,IdentifierExpression[data],IntegerLiteral[0]]]]] VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=3, mutex={3:0}] [L722] 3 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=3, mutex={3:0}] - UnprovableResult [Line: 706]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 708]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 709]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 716]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 720]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 721]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 722]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 725]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 726]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 730]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 732]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 734]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 732]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 733]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 115 locations, 33 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.0s, OverallIterations: 20, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 5.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1378 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 948 mSDsluCounter, 148 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 57 mSDsCounter, 151 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2465 IncrementalHoareTripleChecker+Invalid, 2616 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 151 mSolverCounterUnsat, 91 mSDtfsCounter, 2465 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=656occurred in iteration=17, InterpolantAutomatonStates: 78, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 311 NumberOfCodeBlocks, 311 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 262 ConstructedInterpolants, 0 QuantifiedInterpolants, 1209 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 19 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-02-05 10:37:41,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE