./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/circular_buffer_ok.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/circular_buffer_ok.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:59:00,481 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:59:00,523 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:59:00,526 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:59:00,527 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:59:00,545 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:59:00,546 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:59:00,547 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:59:00,547 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:59:00,550 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:59:00,550 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:59:00,551 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:59:00,551 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:59:00,552 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:59:00,553 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:59:00,553 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:59:00,553 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:59:00,553 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:59:00,553 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:59:00,554 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:59:00,555 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:59:00,555 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:59:00,555 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:59:00,555 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:59:00,556 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:59:00,556 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:59:00,556 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:59:00,556 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:59:00,557 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:59:00,557 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:59:00,558 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:59:00,558 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:59:00,558 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:59:00,558 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:59:00,558 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:59:00,559 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:59:00,559 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:59:00,559 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:59:00,559 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:59:00,559 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:59:00,559 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:59:00,560 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:59:00,560 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:59:00,560 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 21:59:00,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:59:00,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:59:00,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:59:00,927 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:59:00,927 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:59:00,928 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2024-06-27 21:59:01,963 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:59:02,189 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:59:02,190 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2024-06-27 21:59:02,207 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8be59c349/4b04ceeafa604c639915286d04631ec9/FLAG049dcb84d [2024-06-27 21:59:02,218 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8be59c349/4b04ceeafa604c639915286d04631ec9 [2024-06-27 21:59:02,220 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:59:02,220 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:59:02,221 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/circular_buffer_ok.yml/witness.yml [2024-06-27 21:59:02,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:59:02,303 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:59:02,303 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:59:02,304 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:59:02,308 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:59:02,310 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:59:02" (1/2) ... [2024-06-27 21:59:02,310 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17f37f29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:59:02, skipping insertion in model container [2024-06-27 21:59:02,310 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:59:02" (1/2) ... [2024-06-27 21:59:02,312 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@50c1260e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:59:02, skipping insertion in model container [2024-06-27 21:59:02,312 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:59:02" (2/2) ... [2024-06-27 21:59:02,313 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17f37f29 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:59:02, skipping insertion in model container [2024-06-27 21:59:02,313 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:59:02" (2/2) ... [2024-06-27 21:59:02,313 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:59:02,338 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:59:02,339 INFO L97 edCorrectnessWitness]: Location invariant before [L765-L765] ! multithreaded || (m_locked || ((-1LL + (long long )receive) + (long long )send >= 0LL && (1LL - (long long )receive) - (long long )send >= 0LL)) [2024-06-27 21:59:02,340 INFO L97 edCorrectnessWitness]: Location invariant before [L764-L764] ! multithreaded || (m_locked || ((-1LL + (long long )receive) + (long long )send >= 0LL && (1LL - (long long )receive) - (long long )send >= 0LL)) [2024-06-27 21:59:02,340 INFO L103 edCorrectnessWitness]: ghost_variable m_locked = 0 [2024-06-27 21:59:02,340 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:59:02,340 INFO L106 edCorrectnessWitness]: ghost_update [L736-L736] m_locked = 0; [2024-06-27 21:59:02,341 INFO L106 edCorrectnessWitness]: ghost_update [L753-L753] m_locked = 0; [2024-06-27 21:59:02,341 INFO L106 edCorrectnessWitness]: ghost_update [L763-L763] multithreaded = 1; [2024-06-27 21:59:02,341 INFO L106 edCorrectnessWitness]: ghost_update [L745-L745] m_locked = 1; [2024-06-27 21:59:02,341 INFO L106 edCorrectnessWitness]: ghost_update [L727-L727] m_locked = 1; [2024-06-27 21:59:02,376 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:59:02,639 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30451,30464] [2024-06-27 21:59:02,646 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30681,30694] [2024-06-27 21:59:02,651 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30979,30992] [2024-06-27 21:59:02,663 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:59:02,673 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local [2024-06-27 21:59:02,734 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30451,30464] Start Parsing Local [2024-06-27 21:59:02,737 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30681,30694] Start Parsing Local Start Parsing Local [2024-06-27 21:59:02,739 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30979,30992] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:59:02,752 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:59:02,788 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:59:02,789 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:59:02 WrapperNode [2024-06-27 21:59:02,789 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:59:02,790 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:59:02,790 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:59:02,790 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:59:02,795 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:59:02" (1/1) ... [2024-06-27 21:59:02,818 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:59:02" (1/1) ... [2024-06-27 21:59:02,845 INFO L138 Inliner]: procedures = 168, calls = 28, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 146 [2024-06-27 21:59:02,846 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:59:02,846 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:59:02,846 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:59:02,847 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:59:02,857 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:59:02" (1/1) ... [2024-06-27 21:59:02,858 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:59:02" (1/1) ... [2024-06-27 21:59:02,860 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:59:02" (1/1) ... [2024-06-27 21:59:02,873 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 1, 3, 8]. 57 percent of accesses are in the largest equivalence class. The 11 initializations are split as follows [2, 1, 0, 8]. The 2 writes are split as follows [0, 0, 2, 0]. [2024-06-27 21:59:02,874 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:59:02" (1/1) ... [2024-06-27 21:59:02,874 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:59:02" (1/1) ... [2024-06-27 21:59:02,887 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:59:02" (1/1) ... [2024-06-27 21:59:02,890 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:59:02" (1/1) ... [2024-06-27 21:59:02,891 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:59:02" (1/1) ... [2024-06-27 21:59:02,892 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:59:02" (1/1) ... [2024-06-27 21:59:02,895 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:59:02,896 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:59:02,896 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:59:02,896 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:59:02,896 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:59:02" (1/1) ... [2024-06-27 21:59:02,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:59:02,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:59:02,931 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 21:59:02,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 21:59:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:59:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:59:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-06-27 21:59:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-06-27 21:59:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-27 21:59:02,956 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-27 21:59:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-27 21:59:02,957 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-27 21:59:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:59:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:59:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-06-27 21:59:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-06-27 21:59:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-06-27 21:59:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:59:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-06-27 21:59:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-06-27 21:59:02,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-06-27 21:59:02,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-06-27 21:59:02,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:59:02,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:59:02,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-27 21:59:02,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-06-27 21:59:02,962 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-06-27 21:59:02,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:59:02,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:59:02,964 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:59:03,079 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:59:03,081 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:59:03,315 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:59:03,315 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:59:03,446 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:59:03,446 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-27 21:59:03,447 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:59:03 BoogieIcfgContainer [2024-06-27 21:59:03,447 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:59:03,448 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:59:03,448 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:59:03,451 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:59:03,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:59:02" (1/4) ... [2024-06-27 21:59:03,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60aaa2c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:59:03, skipping insertion in model container [2024-06-27 21:59:03,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:59:02" (2/4) ... [2024-06-27 21:59:03,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60aaa2c9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:59:03, skipping insertion in model container [2024-06-27 21:59:03,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:59:02" (3/4) ... [2024-06-27 21:59:03,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60aaa2c9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:59:03, skipping insertion in model container [2024-06-27 21:59:03,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:59:03" (4/4) ... [2024-06-27 21:59:03,453 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_ok.i [2024-06-27 21:59:03,466 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:59:03,466 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 21:59:03,466 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:59:03,503 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 21:59:03,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 51 transitions, 116 flow [2024-06-27 21:59:03,570 INFO L124 PetriNetUnfolderBase]: 8/49 cut-off events. [2024-06-27 21:59:03,571 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 21:59:03,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 49 events. 8/49 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 125 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-06-27 21:59:03,574 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 51 transitions, 116 flow [2024-06-27 21:59:03,577 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 47 transitions, 103 flow [2024-06-27 21:59:03,591 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:59:03,598 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;@43fc9d0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:59:03,598 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-06-27 21:59:03,602 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:59:03,602 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:59:03,603 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:59:03,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:59:03,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:59:03,604 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-06-27 21:59:03,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:59:03,608 INFO L85 PathProgramCache]: Analyzing trace with hash 377410168, now seen corresponding path program 1 times [2024-06-27 21:59:03,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:59:03,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723788089] [2024-06-27 21:59:03,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:59:03,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:59:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:59:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:59:03,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:59:03,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723788089] [2024-06-27 21:59:03,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723788089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:59:03,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:59:03,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:59:03,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299191049] [2024-06-27 21:59:03,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:59:03,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:59:03,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:59:04,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:59:04,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:59:04,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-06-27 21:59:04,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:04,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:59:04,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-06-27 21:59:04,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:59:04,404 INFO L124 PetriNetUnfolderBase]: 936/1805 cut-off events. [2024-06-27 21:59:04,405 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-06-27 21:59:04,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3320 conditions, 1805 events. 936/1805 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9489 event pairs, 385 based on Foata normal form. 233/1814 useless extension candidates. Maximal degree in co-relation 3233. Up to 950 conditions per place. [2024-06-27 21:59:04,419 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 48 selfloop transitions, 3 changer transitions 1/65 dead transitions. [2024-06-27 21:59:04,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 65 transitions, 249 flow [2024-06-27 21:59:04,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:59:04,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:59:04,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-06-27 21:59:04,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6928104575163399 [2024-06-27 21:59:04,431 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 103 flow. Second operand 3 states and 106 transitions. [2024-06-27 21:59:04,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 65 transitions, 249 flow [2024-06-27 21:59:04,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 65 transitions, 241 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:59:04,439 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 113 flow [2024-06-27 21:59:04,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2024-06-27 21:59:04,444 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 0 predicate places. [2024-06-27 21:59:04,444 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 113 flow [2024-06-27 21:59:04,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:04,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:59:04,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:59:04,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:59:04,445 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-06-27 21:59:04,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:59:04,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1432711596, now seen corresponding path program 1 times [2024-06-27 21:59:04,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:59:04,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128156267] [2024-06-27 21:59:04,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:59:04,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:59:04,479 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-27 21:59:04,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037631400] [2024-06-27 21:59:04,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:59:04,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:59:04,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:59:04,482 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:59:04,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 21:59:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:59:04,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2024-06-27 21:59:04,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:59:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:59:04,730 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 21:59:04,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:59:04,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128156267] [2024-06-27 21:59:04,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-27 21:59:04,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037631400] [2024-06-27 21:59:04,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037631400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:59:04,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:59:04,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:59:04,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667334076] [2024-06-27 21:59:04,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:59:04,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:59:04,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:59:04,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:59:04,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:59:04,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 21:59:04,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:04,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:59:04,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 21:59:04,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:59:04,904 INFO L124 PetriNetUnfolderBase]: 748/1438 cut-off events. [2024-06-27 21:59:04,905 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2024-06-27 21:59:04,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2841 conditions, 1438 events. 748/1438 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 7177 event pairs, 543 based on Foata normal form. 43/1328 useless extension candidates. Maximal degree in co-relation 2237. Up to 1159 conditions per place. [2024-06-27 21:59:04,911 INFO L140 encePairwiseOnDemand]: 49/51 looper letters, 28 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2024-06-27 21:59:04,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 43 transitions, 167 flow [2024-06-27 21:59:04,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:59:04,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:59:04,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-27 21:59:04,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228758169934641 [2024-06-27 21:59:04,922 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 113 flow. Second operand 3 states and 80 transitions. [2024-06-27 21:59:04,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 43 transitions, 167 flow [2024-06-27 21:59:04,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:59:04,925 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 108 flow [2024-06-27 21:59:04,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2024-06-27 21:59:04,926 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2024-06-27 21:59:04,926 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 108 flow [2024-06-27 21:59:04,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:04,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:59:04,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:59:04,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-06-27 21:59:05,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:59:05,133 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-06-27 21:59:05,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:59:05,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1464417898, now seen corresponding path program 1 times [2024-06-27 21:59:05,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:59:05,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633426852] [2024-06-27 21:59:05,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:59:05,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:59:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:59:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:59:05,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:59:05,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633426852] [2024-06-27 21:59:05,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633426852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:59:05,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:59:05,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:59:05,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078684380] [2024-06-27 21:59:05,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:59:05,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:59:05,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:59:05,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:59:05,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:59:05,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 21:59:05,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:05,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:59:05,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 21:59:05,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:59:05,396 INFO L124 PetriNetUnfolderBase]: 803/1560 cut-off events. [2024-06-27 21:59:05,396 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-06-27 21:59:05,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3032 conditions, 1560 events. 803/1560 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 7983 event pairs, 281 based on Foata normal form. 0/1409 useless extension candidates. Maximal degree in co-relation 3024. Up to 1100 conditions per place. [2024-06-27 21:59:05,404 INFO L140 encePairwiseOnDemand]: 48/51 looper letters, 39 selfloop transitions, 2 changer transitions 2/57 dead transitions. [2024-06-27 21:59:05,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 57 transitions, 225 flow [2024-06-27 21:59:05,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:59:05,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:59:05,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2024-06-27 21:59:05,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6143790849673203 [2024-06-27 21:59:05,405 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 108 flow. Second operand 3 states and 94 transitions. [2024-06-27 21:59:05,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 57 transitions, 225 flow [2024-06-27 21:59:05,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 57 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:59:05,407 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 119 flow [2024-06-27 21:59:05,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2024-06-27 21:59:05,408 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 1 predicate places. [2024-06-27 21:59:05,408 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 119 flow [2024-06-27 21:59:05,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:05,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:59:05,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:59:05,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:59:05,408 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-06-27 21:59:05,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:59:05,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1473259345, now seen corresponding path program 1 times [2024-06-27 21:59:05,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:59:05,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236544760] [2024-06-27 21:59:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:59:05,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:59:05,418 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-27 21:59:05,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610499712] [2024-06-27 21:59:05,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:59:05,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:59:05,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:59:05,419 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:59:05,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 21:59:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:59:05,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 21:59:05,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:59:05,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:59:05,562 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 21:59:05,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:59:05,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236544760] [2024-06-27 21:59:05,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-27 21:59:05,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610499712] [2024-06-27 21:59:05,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610499712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:59:05,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:59:05,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:59:05,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117022539] [2024-06-27 21:59:05,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:59:05,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:59:05,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:59:05,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:59:05,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:59:05,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 21:59:05,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 119 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:05,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:59:05,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 21:59:05,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:59:05,815 INFO L124 PetriNetUnfolderBase]: 1141/2165 cut-off events. [2024-06-27 21:59:05,815 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2024-06-27 21:59:05,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4458 conditions, 2165 events. 1141/2165 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 12435 event pairs, 417 based on Foata normal form. 0/1971 useless extension candidates. Maximal degree in co-relation 4448. Up to 976 conditions per place. [2024-06-27 21:59:05,826 INFO L140 encePairwiseOnDemand]: 45/51 looper letters, 83 selfloop transitions, 6 changer transitions 0/102 dead transitions. [2024-06-27 21:59:05,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 102 transitions, 441 flow [2024-06-27 21:59:05,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:59:05,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:59:05,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-27 21:59:05,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6176470588235294 [2024-06-27 21:59:05,828 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 119 flow. Second operand 6 states and 189 transitions. [2024-06-27 21:59:05,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 102 transitions, 441 flow [2024-06-27 21:59:05,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 102 transitions, 439 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:59:05,830 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 145 flow [2024-06-27 21:59:05,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=145, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-27 21:59:05,831 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2024-06-27 21:59:05,831 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 145 flow [2024-06-27 21:59:05,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:05,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:59:05,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:59:05,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 21:59:06,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-06-27 21:59:06,044 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-06-27 21:59:06,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:59:06,044 INFO L85 PathProgramCache]: Analyzing trace with hash 365410484, now seen corresponding path program 1 times [2024-06-27 21:59:06,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:59:06,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239790420] [2024-06-27 21:59:06,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:59:06,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:59:06,057 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-27 21:59:06,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243780784] [2024-06-27 21:59:06,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:59:06,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:59:06,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:59:06,061 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:59:06,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 21:59:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:59:06,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2024-06-27 21:59:06,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:59:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:59:06,170 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 21:59:06,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:59:06,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239790420] [2024-06-27 21:59:06,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-27 21:59:06,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243780784] [2024-06-27 21:59:06,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243780784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:59:06,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:59:06,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:59:06,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712577521] [2024-06-27 21:59:06,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:59:06,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:59:06,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:59:06,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:59:06,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:59:06,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-27 21:59:06,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:06,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:59:06,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-27 21:59:06,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:59:06,405 INFO L124 PetriNetUnfolderBase]: 1519/2948 cut-off events. [2024-06-27 21:59:06,405 INFO L125 PetriNetUnfolderBase]: For 749/775 co-relation queries the response was YES. [2024-06-27 21:59:06,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6669 conditions, 2948 events. 1519/2948 cut-off events. For 749/775 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 18276 event pairs, 478 based on Foata normal form. 137/2877 useless extension candidates. Maximal degree in co-relation 6657. Up to 1335 conditions per place. [2024-06-27 21:59:06,420 INFO L140 encePairwiseOnDemand]: 45/51 looper letters, 62 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2024-06-27 21:59:06,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 78 transitions, 376 flow [2024-06-27 21:59:06,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:59:06,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:59:06,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-06-27 21:59:06,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6928104575163399 [2024-06-27 21:59:06,421 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 145 flow. Second operand 3 states and 106 transitions. [2024-06-27 21:59:06,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 78 transitions, 376 flow [2024-06-27 21:59:06,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 78 transitions, 370 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:59:06,426 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 178 flow [2024-06-27 21:59:06,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-06-27 21:59:06,427 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2024-06-27 21:59:06,427 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 178 flow [2024-06-27 21:59:06,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:06,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:59:06,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:59:06,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 21:59:06,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:59:06,639 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-06-27 21:59:06,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:59:06,639 INFO L85 PathProgramCache]: Analyzing trace with hash -402228008, now seen corresponding path program 1 times [2024-06-27 21:59:06,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:59:06,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227136002] [2024-06-27 21:59:06,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:59:06,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:59:06,652 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-27 21:59:06,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912708107] [2024-06-27 21:59:06,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:59:06,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:59:06,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:59:06,654 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:59:06,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 21:59:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:59:06,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 21:59:06,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:59:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:59:06,779 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 21:59:06,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:59:06,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227136002] [2024-06-27 21:59:06,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-27 21:59:06,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912708107] [2024-06-27 21:59:06,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912708107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:59:06,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:59:06,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:59:06,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954174973] [2024-06-27 21:59:06,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:59:06,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:59:06,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:59:06,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:59:06,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:59:06,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-27 21:59:06,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:06,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:59:06,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-27 21:59:06,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:59:06,939 INFO L124 PetriNetUnfolderBase]: 799/1537 cut-off events. [2024-06-27 21:59:06,940 INFO L125 PetriNetUnfolderBase]: For 771/775 co-relation queries the response was YES. [2024-06-27 21:59:06,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3802 conditions, 1537 events. 799/1537 cut-off events. For 771/775 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7613 event pairs, 406 based on Foata normal form. 104/1578 useless extension candidates. Maximal degree in co-relation 3789. Up to 824 conditions per place. [2024-06-27 21:59:06,946 INFO L140 encePairwiseOnDemand]: 44/51 looper letters, 51 selfloop transitions, 3 changer transitions 3/67 dead transitions. [2024-06-27 21:59:06,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 67 transitions, 345 flow [2024-06-27 21:59:06,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:59:06,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:59:06,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-27 21:59:06,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2024-06-27 21:59:06,948 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 178 flow. Second operand 4 states and 104 transitions. [2024-06-27 21:59:06,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 67 transitions, 345 flow [2024-06-27 21:59:06,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 67 transitions, 326 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:59:06,952 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 163 flow [2024-06-27 21:59:06,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2024-06-27 21:59:06,954 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2024-06-27 21:59:06,954 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 163 flow [2024-06-27 21:59:06,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:06,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:59:06,955 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] [2024-06-27 21:59:06,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-06-27 21:59:07,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:59:07,166 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-06-27 21:59:07,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:59:07,167 INFO L85 PathProgramCache]: Analyzing trace with hash 458481333, now seen corresponding path program 1 times [2024-06-27 21:59:07,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:59:07,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083855162] [2024-06-27 21:59:07,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:59:07,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:59:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:59:07,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:59:07,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083855162] [2024-06-27 21:59:07,198 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2024-06-27 21:59:07,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853309728] [2024-06-27 21:59:07,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:59:07,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:59:07,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:59:07,200 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:59:07,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 21:59:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:59:07,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-27 21:59:07,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:59:07,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-06-27 21:59:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:59:07,332 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 21:59:07,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853309728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:59:07,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:59:07,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:59:07,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190495184] [2024-06-27 21:59:07,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:59:07,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:59:07,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:59:07,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:59:07,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:59:07,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 21:59:07,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:07,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:59:07,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 21:59:07,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:59:07,416 INFO L124 PetriNetUnfolderBase]: 366/797 cut-off events. [2024-06-27 21:59:07,417 INFO L125 PetriNetUnfolderBase]: For 213/213 co-relation queries the response was YES. [2024-06-27 21:59:07,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1832 conditions, 797 events. 366/797 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3396 event pairs, 105 based on Foata normal form. 40/814 useless extension candidates. Maximal degree in co-relation 1818. Up to 393 conditions per place. [2024-06-27 21:59:07,420 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 40 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2024-06-27 21:59:07,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 266 flow [2024-06-27 21:59:07,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:59:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:59:07,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-06-27 21:59:07,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6209150326797386 [2024-06-27 21:59:07,422 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 163 flow. Second operand 3 states and 95 transitions. [2024-06-27 21:59:07,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 266 flow [2024-06-27 21:59:07,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 256 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:59:07,423 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 145 flow [2024-06-27 21:59:07,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2024-06-27 21:59:07,424 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2024-06-27 21:59:07,424 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 145 flow [2024-06-27 21:59:07,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:07,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:59:07,425 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] [2024-06-27 21:59:07,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 21:59:07,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:59:07,636 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-06-27 21:59:07,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:59:07,637 INFO L85 PathProgramCache]: Analyzing trace with hash -573485969, now seen corresponding path program 1 times [2024-06-27 21:59:07,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:59:07,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576154716] [2024-06-27 21:59:07,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:59:07,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:59:07,646 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-27 21:59:07,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069013105] [2024-06-27 21:59:07,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:59:07,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:59:07,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:59:07,655 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:59:07,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 21:59:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:59:07,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 21:59:07,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:59:07,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-06-27 21:59:07,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-06-27 21:59:08,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-06-27 21:59:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:59:08,092 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 21:59:08,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:59:08,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576154716] [2024-06-27 21:59:08,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-27 21:59:08,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069013105] [2024-06-27 21:59:08,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069013105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:59:08,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:59:08,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:59:08,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805051578] [2024-06-27 21:59:08,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:59:08,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:59:08,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:59:08,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:59:08,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:59:08,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 21:59:08,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 145 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:08,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:59:08,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 21:59:08,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:59:08,332 INFO L124 PetriNetUnfolderBase]: 446/958 cut-off events. [2024-06-27 21:59:08,332 INFO L125 PetriNetUnfolderBase]: For 286/286 co-relation queries the response was YES. [2024-06-27 21:59:08,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2229 conditions, 958 events. 446/958 cut-off events. For 286/286 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3952 event pairs, 85 based on Foata normal form. 13/950 useless extension candidates. Maximal degree in co-relation 2216. Up to 409 conditions per place. [2024-06-27 21:59:08,336 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 77 selfloop transitions, 9 changer transitions 10/108 dead transitions. [2024-06-27 21:59:08,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 108 transitions, 531 flow [2024-06-27 21:59:08,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:59:08,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:59:08,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 247 transitions. [2024-06-27 21:59:08,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5381263616557734 [2024-06-27 21:59:08,338 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 145 flow. Second operand 9 states and 247 transitions. [2024-06-27 21:59:08,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 108 transitions, 531 flow [2024-06-27 21:59:08,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 108 transitions, 503 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 21:59:08,340 INFO L231 Difference]: Finished difference. Result has 63 places, 50 transitions, 202 flow [2024-06-27 21:59:08,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=202, PETRI_PLACES=63, PETRI_TRANSITIONS=50} [2024-06-27 21:59:08,341 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 17 predicate places. [2024-06-27 21:59:08,341 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 202 flow [2024-06-27 21:59:08,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:08,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:59:08,342 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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] [2024-06-27 21:59:08,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-27 21:59:08,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:59:08,554 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-06-27 21:59:08,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:59:08,554 INFO L85 PathProgramCache]: Analyzing trace with hash 796997028, now seen corresponding path program 1 times [2024-06-27 21:59:08,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:59:08,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861268517] [2024-06-27 21:59:08,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:59:08,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:59:08,573 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-27 21:59:08,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885759005] [2024-06-27 21:59:08,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:59:08,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:59:08,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:59:08,576 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:59:08,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 21:59:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:59:08,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-27 21:59:08,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:59:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:59:08,762 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 21:59:08,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:59:08,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861268517] [2024-06-27 21:59:08,762 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-27 21:59:08,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885759005] [2024-06-27 21:59:08,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885759005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:59:08,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:59:08,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:59:08,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005553832] [2024-06-27 21:59:08,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:59:08,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:59:08,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:59:08,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:59:08,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:59:08,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-27 21:59:08,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:08,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:59:08,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-27 21:59:08,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:59:08,854 INFO L124 PetriNetUnfolderBase]: 425/902 cut-off events. [2024-06-27 21:59:08,855 INFO L125 PetriNetUnfolderBase]: For 457/457 co-relation queries the response was YES. [2024-06-27 21:59:08,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2245 conditions, 902 events. 425/902 cut-off events. For 457/457 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3617 event pairs, 325 based on Foata normal form. 0/891 useless extension candidates. Maximal degree in co-relation 2227. Up to 753 conditions per place. [2024-06-27 21:59:08,859 INFO L140 encePairwiseOnDemand]: 49/51 looper letters, 33 selfloop transitions, 1 changer transitions 1/45 dead transitions. [2024-06-27 21:59:08,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 45 transitions, 255 flow [2024-06-27 21:59:08,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:59:08,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:59:08,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-27 21:59:08,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49673202614379086 [2024-06-27 21:59:08,860 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 202 flow. Second operand 3 states and 76 transitions. [2024-06-27 21:59:08,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 45 transitions, 255 flow [2024-06-27 21:59:08,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 45 transitions, 240 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 21:59:08,863 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 170 flow [2024-06-27 21:59:08,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-06-27 21:59:08,863 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 11 predicate places. [2024-06-27 21:59:08,864 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 170 flow [2024-06-27 21:59:08,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:08,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:59:08,864 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:59:08,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 21:59:09,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:59:09,076 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-06-27 21:59:09,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:59:09,077 INFO L85 PathProgramCache]: Analyzing trace with hash 66367565, now seen corresponding path program 1 times [2024-06-27 21:59:09,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:59:09,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810772512] [2024-06-27 21:59:09,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:59:09,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:59:09,089 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-27 21:59:09,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201949596] [2024-06-27 21:59:09,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:59:09,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:59:09,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:59:09,091 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:59:09,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 21:59:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:59:09,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 52 conjunts are in the unsatisfiable core [2024-06-27 21:59:09,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:59:09,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-06-27 21:59:09,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2024-06-27 21:59:09,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2024-06-27 21:59:09,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-06-27 21:59:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:59:09,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:59:53,045 WARN L293 SmtUtils]: Spent 12.48s on a formula simplification. DAG size of input: 234 DAG size of output: 225 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 22:00:30,832 WARN L293 SmtUtils]: Spent 6.28s on a formula simplification that was a NOOP. DAG size: 225 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 22:01:06,155 WARN L293 SmtUtils]: Spent 6.31s on a formula simplification that was a NOOP. DAG size: 121 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 22:01:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:01:09,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:01:09,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810772512] [2024-06-27 22:01:09,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-27 22:01:09,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201949596] [2024-06-27 22:01:09,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201949596] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 22:01:09,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-06-27 22:01:09,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2024-06-27 22:01:09,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294396641] [2024-06-27 22:01:09,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-06-27 22:01:09,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 22:01:09,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:01:09,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 22:01:09,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2024-06-27 22:01:15,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-06-27 22:01:15,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 170 flow. Second operand has 27 states, 27 states have (on average 17.444444444444443) internal successors, (471), 27 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:15,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:01:15,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-06-27 22:01:15,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:01:41,193 WARN L293 SmtUtils]: Spent 24.28s on a formula simplification. DAG size of input: 431 DAG size of output: 240 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 22:02:27,247 WARN L293 SmtUtils]: Spent 45.78s on a formula simplification. DAG size of input: 392 DAG size of output: 319 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 22:03:16,548 WARN L293 SmtUtils]: Spent 44.99s on a formula simplification. DAG size of input: 390 DAG size of output: 317 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 22:04:01,307 WARN L293 SmtUtils]: Spent 38.16s on a formula simplification. DAG size of input: 329 DAG size of output: 273 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 22:04:11,556 WARN L293 SmtUtils]: Spent 6.79s on a formula simplification. DAG size of input: 214 DAG size of output: 208 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 22:05:01,008 WARN L293 SmtUtils]: Spent 46.43s on a formula simplification. DAG size of input: 389 DAG size of output: 338 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 22:05:49,983 WARN L293 SmtUtils]: Spent 46.47s on a formula simplification. DAG size of input: 387 DAG size of output: 336 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 22:06:33,609 WARN L293 SmtUtils]: Spent 41.80s on a formula simplification. DAG size of input: 327 DAG size of output: 294 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 22:07:27,898 WARN L293 SmtUtils]: Spent 52.88s on a formula simplification. DAG size of input: 363 DAG size of output: 355 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 22:08:23,491 WARN L293 SmtUtils]: Spent 47.29s on a formula simplification. DAG size of input: 392 DAG size of output: 341 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 22:09:09,323 WARN L293 SmtUtils]: Spent 44.89s on a formula simplification. DAG size of input: 332 DAG size of output: 299 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 22:09:23,690 WARN L293 SmtUtils]: Spent 12.40s on a formula simplification that was a NOOP. DAG size: 284 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 22:09:26,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-06-27 22:09:44,523 WARN L293 SmtUtils]: Spent 13.81s on a formula simplification that was a NOOP. DAG size: 297 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 22:10:21,640 WARN L293 SmtUtils]: Spent 35.86s on a formula simplification. DAG size of input: 302 DAG size of output: 297 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 22:10:58,772 WARN L293 SmtUtils]: Spent 36.53s on a formula simplification. DAG size of input: 374 DAG size of output: 279 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 22:12:12,736 WARN L293 SmtUtils]: Spent 1.22m on a formula simplification. DAG size of input: 450 DAG size of output: 345 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 22:13:29,944 WARN L293 SmtUtils]: Spent 1.27m on a formula simplification. DAG size of input: 439 DAG size of output: 319 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15