./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.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_bad.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_bad.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/circular_buffer_bad.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 22:55:51,989 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 22:55:52,043 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 22:55:52,046 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 22:55:52,046 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 22:55:52,075 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 22:55:52,075 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 22:55:52,075 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 22:55:52,076 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 22:55:52,076 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 22:55:52,076 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 22:55:52,077 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 22:55:52,077 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 22:55:52,077 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 22:55:52,077 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 22:55:52,078 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 22:55:52,078 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 22:55:52,078 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 22:55:52,079 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 22:55:52,079 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 22:55:52,079 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 22:55:52,080 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 22:55:52,080 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 22:55:52,080 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 22:55:52,080 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 22:55:52,081 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 22:55:52,081 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 22:55:52,081 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 22:55:52,081 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 22:55:52,082 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 22:55:52,082 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 22:55:52,082 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 22:55:52,082 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 22:55:52,083 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 22:55:52,083 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 22:55:52,083 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 22:55:52,083 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 22:55:52,084 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 22:55:52,084 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 22:55:52,084 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 22:55:52,084 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 22:55:52,088 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 22:55:52,088 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 22:55:52,089 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 22:55:52,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 22:55:52,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 22:55:52,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 22:55:52,327 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 22:55:52,328 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 22:55:52,329 INFO L431 ainManager$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_bad.yml/witness.yml [2024-06-27 22:55:52,445 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 22:55:52,446 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 22:55:52,446 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2024-06-27 22:55:53,425 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 22:55:53,642 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 22:55:53,642 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2024-06-27 22:55:53,654 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91a9d73e8/77725403a0d445279f6e5bd5902709bc/FLAGbf9ada14e [2024-06-27 22:55:53,665 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91a9d73e8/77725403a0d445279f6e5bd5902709bc [2024-06-27 22:55:53,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 22:55:53,666 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 22:55:53,667 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 22:55:53,667 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 22:55:53,671 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 22:55:53,672 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 10:55:52" (1/2) ... [2024-06-27 22:55:53,673 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a5342c3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:55:53, skipping insertion in model container [2024-06-27 22:55:53,673 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 10:55:52" (1/2) ... [2024-06-27 22:55:53,674 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@24c1fc63 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:55:53, skipping insertion in model container [2024-06-27 22:55:53,674 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 10:55:53" (2/2) ... [2024-06-27 22:55:53,674 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a5342c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:55:53, skipping insertion in model container [2024-06-27 22:55:53,674 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 10:55:53" (2/2) ... [2024-06-27 22:55:53,675 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 22:55:53,699 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 22:55:53,701 INFO L97 edCorrectnessWitness]: Location invariant before [L762-L762] ! multithreaded || (m_locked || ((-1LL + (long long )receive) + (long long )send >= 0LL && (1LL - (long long )receive) - (long long )send >= 0LL)) [2024-06-27 22:55:53,701 INFO L97 edCorrectnessWitness]: Location invariant before [L763-L763] ! multithreaded || (m_locked || ((-1LL + (long long )receive) + (long long )send >= 0LL && (1LL - (long long )receive) - (long long )send >= 0LL)) [2024-06-27 22:55:53,701 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 22:55:53,701 INFO L103 edCorrectnessWitness]: ghost_variable m_locked = 0 [2024-06-27 22:55:53,701 INFO L106 edCorrectnessWitness]: ghost_update [L750-L750] m_locked = 0; [2024-06-27 22:55:53,702 INFO L106 edCorrectnessWitness]: ghost_update [L726-L726] m_locked = 1; [2024-06-27 22:55:53,702 INFO L106 edCorrectnessWitness]: ghost_update [L761-L761] multithreaded = 1; [2024-06-27 22:55:53,702 INFO L106 edCorrectnessWitness]: ghost_update [L733-L733] m_locked = 0; [2024-06-27 22:55:53,702 INFO L106 edCorrectnessWitness]: ghost_update [L742-L742] m_locked = 1; [2024-06-27 22:55:53,742 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 22:55:54,013 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_bad.i[30440,30453] [2024-06-27 22:55:54,022 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_bad.i[30895,30908] [2024-06-27 22:55:54,027 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 22:55:54,036 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local [2024-06-27 22:55:54,086 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_bad.i[30440,30453] Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 22:55:54,090 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_bad.i[30895,30908] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 22:55:54,102 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 22:55:54,135 INFO L206 MainTranslator]: Completed translation [2024-06-27 22:55:54,136 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:55:54 WrapperNode [2024-06-27 22:55:54,136 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 22:55:54,137 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 22:55:54,137 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 22:55:54,137 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 22:55:54,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:55:54" (1/1) ... [2024-06-27 22:55:54,170 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:55:54" (1/1) ... [2024-06-27 22:55:54,189 INFO L138 Inliner]: procedures = 168, calls = 28, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 139 [2024-06-27 22:55:54,189 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 22:55:54,190 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 22:55:54,190 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 22:55:54,190 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 22:55:54,198 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:55:54" (1/1) ... [2024-06-27 22:55:54,198 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:55:54" (1/1) ... [2024-06-27 22:55:54,202 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:55:54" (1/1) ... [2024-06-27 22:55:54,224 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 22:55:54,225 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:55:54" (1/1) ... [2024-06-27 22:55:54,225 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:55:54" (1/1) ... [2024-06-27 22:55:54,245 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:55:54" (1/1) ... [2024-06-27 22:55:54,249 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:55:54" (1/1) ... [2024-06-27 22:55:54,251 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:55:54" (1/1) ... [2024-06-27 22:55:54,255 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:55:54" (1/1) ... [2024-06-27 22:55:54,257 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 22:55:54,258 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 22:55:54,258 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 22:55:54,258 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 22:55:54,259 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:55:54" (1/1) ... [2024-06-27 22:55:54,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 22:55:54,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 22:55:54,287 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 22:55:54,288 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 22:55:54,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 22:55:54,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 22:55:54,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-06-27 22:55:54,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-06-27 22:55:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-27 22:55:54,312 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-27 22:55:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-27 22:55:54,312 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-27 22:55:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 22:55:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 22:55:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-06-27 22:55:54,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-06-27 22:55:54,316 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-06-27 22:55:54,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 22:55:54,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-06-27 22:55:54,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-06-27 22:55:54,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-06-27 22:55:54,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-06-27 22:55:54,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 22:55:54,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 22:55:54,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-27 22:55:54,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-06-27 22:55:54,319 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-06-27 22:55:54,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 22:55:54,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 22:55:54,323 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 22:55:54,431 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 22:55:54,433 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 22:55:54,653 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 22:55:54,653 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 22:55:54,778 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 22:55:54,778 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-27 22:55:54,778 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 10:55:54 BoogieIcfgContainer [2024-06-27 22:55:54,778 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 22:55:54,780 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 22:55:54,780 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 22:55:54,782 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 22:55:54,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 10:55:52" (1/4) ... [2024-06-27 22:55:54,783 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b01c30 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 10:55:54, skipping insertion in model container [2024-06-27 22:55:54,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 10:55:53" (2/4) ... [2024-06-27 22:55:54,783 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b01c30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 10:55:54, skipping insertion in model container [2024-06-27 22:55:54,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:55:54" (3/4) ... [2024-06-27 22:55:54,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b01c30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 10:55:54, skipping insertion in model container [2024-06-27 22:55:54,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 10:55:54" (4/4) ... [2024-06-27 22:55:54,785 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2024-06-27 22:55:54,797 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 22:55:54,798 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 22:55:54,798 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 22:55:54,833 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 22:55:54,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 46 transitions, 106 flow [2024-06-27 22:55:54,881 INFO L124 PetriNetUnfolderBase]: 7/44 cut-off events. [2024-06-27 22:55:54,882 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 22:55:54,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 44 events. 7/44 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 97 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2024-06-27 22:55:54,885 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 46 transitions, 106 flow [2024-06-27 22:55:54,889 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 42 transitions, 93 flow [2024-06-27 22:55:54,903 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 22:55:54,910 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;@45460050, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 22:55:54,911 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 22:55:54,916 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 22:55:54,916 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 22:55:54,917 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 22:55:54,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:55:54,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 22:55:54,918 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 22:55:54,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:55:54,923 INFO L85 PathProgramCache]: Analyzing trace with hash 360791631, now seen corresponding path program 1 times [2024-06-27 22:55:54,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:55:54,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309669636] [2024-06-27 22:55:54,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:55:54,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:55:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:55:55,311 INFO 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 22:55:55,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:55:55,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309669636] [2024-06-27 22:55:55,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309669636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:55:55,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:55:55,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 22:55:55,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540609977] [2024-06-27 22:55:55,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:55:55,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 22:55:55,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:55:55,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 22:55:55,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 22:55:55,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:55:55,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 22:55:55,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:55:55,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:55:55,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:55:55,572 INFO L124 PetriNetUnfolderBase]: 709/1377 cut-off events. [2024-06-27 22:55:55,573 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-06-27 22:55:55,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2508 conditions, 1377 events. 709/1377 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 7060 event pairs, 274 based on Foata normal form. 147/1353 useless extension candidates. Maximal degree in co-relation 2419. Up to 710 conditions per place. [2024-06-27 22:55:55,594 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 42 selfloop transitions, 3 changer transitions 1/58 dead transitions. [2024-06-27 22:55:55,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 58 transitions, 223 flow [2024-06-27 22:55:55,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 22:55:55,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 22:55:55,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-06-27 22:55:55,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6884057971014492 [2024-06-27 22:55:55,605 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 93 flow. Second operand 3 states and 95 transitions. [2024-06-27 22:55:55,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 58 transitions, 223 flow [2024-06-27 22:55:55,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 58 transitions, 215 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 22:55:55,612 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 105 flow [2024-06-27 22:55:55,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2024-06-27 22:55:55,617 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-27 22:55:55,618 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 105 flow [2024-06-27 22:55:55,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 22:55:55,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:55:55,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:55:55,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 22:55:55,619 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 22:55:55,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:55:55,620 INFO L85 PathProgramCache]: Analyzing trace with hash 377032005, now seen corresponding path program 1 times [2024-06-27 22:55:55,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:55:55,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874697874] [2024-06-27 22:55:55,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:55:55,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:55:55,653 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-27 22:55:55,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814360108] [2024-06-27 22:55:55,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:55:55,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 22:55:55,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 22:55:55,656 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 22:55:55,680 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 22:55:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:55:55,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2024-06-27 22:55:55,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 22:55:55,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:55:55,905 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 22:55:55,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:55:55,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874697874] [2024-06-27 22:55:55,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-27 22:55:55,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814360108] [2024-06-27 22:55:55,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814360108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:55:55,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:55:55,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:55:55,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744501301] [2024-06-27 22:55:55,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:55:55,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 22:55:55,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:55:55,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 22:55:55,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 22:55:55,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-06-27 22:55:55,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 22:55:55,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:55:55,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-06-27 22:55:55,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:55:56,072 INFO L124 PetriNetUnfolderBase]: 571/1091 cut-off events. [2024-06-27 22:55:56,073 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2024-06-27 22:55:56,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2160 conditions, 1091 events. 571/1091 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5226 event pairs, 394 based on Foata normal form. 43/1026 useless extension candidates. Maximal degree in co-relation 1647. Up to 861 conditions per place. [2024-06-27 22:55:56,079 INFO L140 encePairwiseOnDemand]: 44/46 looper letters, 25 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2024-06-27 22:55:56,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 153 flow [2024-06-27 22:55:56,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 22:55:56,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 22:55:56,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-06-27 22:55:56,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5362318840579711 [2024-06-27 22:55:56,082 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 105 flow. Second operand 3 states and 74 transitions. [2024-06-27 22:55:56,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 153 flow [2024-06-27 22:55:56,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 22:55:56,085 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 100 flow [2024-06-27 22:55:56,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2024-06-27 22:55:56,086 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2024-06-27 22:55:56,086 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 100 flow [2024-06-27 22:55:56,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 22:55:56,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:55:56,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:55:56,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 22:55:56,300 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 22:55:56,303 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 22:55:56,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:55:56,303 INFO L85 PathProgramCache]: Analyzing trace with hash -2992574, now seen corresponding path program 1 times [2024-06-27 22:55:56,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:55:56,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422924115] [2024-06-27 22:55:56,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:55:56,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:55:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:55:56,407 INFO 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 22:55:56,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:55:56,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422924115] [2024-06-27 22:55:56,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422924115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:55:56,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:55:56,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:55:56,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516111057] [2024-06-27 22:55:56,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:55:56,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 22:55:56,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:55:56,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 22:55:56,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 22:55:56,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:55:56,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 22:55:56,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:55:56,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:55:56,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:55:56,644 INFO L124 PetriNetUnfolderBase]: 794/1585 cut-off events. [2024-06-27 22:55:56,645 INFO L125 PetriNetUnfolderBase]: For 155/157 co-relation queries the response was YES. [2024-06-27 22:55:56,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3083 conditions, 1585 events. 794/1585 cut-off events. For 155/157 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 8763 event pairs, 241 based on Foata normal form. 57/1534 useless extension candidates. Maximal degree in co-relation 3075. Up to 647 conditions per place. [2024-06-27 22:55:56,651 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 47 selfloop transitions, 6 changer transitions 0/63 dead transitions. [2024-06-27 22:55:56,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 63 transitions, 265 flow [2024-06-27 22:55:56,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:55:56,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:55:56,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-27 22:55:56,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5347826086956522 [2024-06-27 22:55:56,657 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 100 flow. Second operand 5 states and 123 transitions. [2024-06-27 22:55:56,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 63 transitions, 265 flow [2024-06-27 22:55:56,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 63 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 22:55:56,659 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 140 flow [2024-06-27 22:55:56,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-06-27 22:55:56,661 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-27 22:55:56,661 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 140 flow [2024-06-27 22:55:56,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 22:55:56,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:55:56,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:55:56,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 22:55:56,662 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 22:55:56,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:55:56,662 INFO L85 PathProgramCache]: Analyzing trace with hash -92768625, now seen corresponding path program 1 times [2024-06-27 22:55:56,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:55:56,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649877144] [2024-06-27 22:55:56,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:55:56,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:55:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:55:56,758 INFO 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 22:55:56,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:55:56,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649877144] [2024-06-27 22:55:56,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649877144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:55:56,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:55:56,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 22:55:56,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228308866] [2024-06-27 22:55:56,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:55:56,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 22:55:56,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:55:56,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 22:55:56,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 22:55:56,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-06-27 22:55:56,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:55:56,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:55:56,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-06-27 22:55:56,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:55:56,928 INFO L124 PetriNetUnfolderBase]: 870/1723 cut-off events. [2024-06-27 22:55:56,929 INFO L125 PetriNetUnfolderBase]: For 757/759 co-relation queries the response was YES. [2024-06-27 22:55:56,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3901 conditions, 1723 events. 870/1723 cut-off events. For 757/759 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 9515 event pairs, 288 based on Foata normal form. 0/1585 useless extension candidates. Maximal degree in co-relation 3890. Up to 1183 conditions per place. [2024-06-27 22:55:56,936 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 42 selfloop transitions, 2 changer transitions 2/59 dead transitions. [2024-06-27 22:55:56,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 59 transitions, 283 flow [2024-06-27 22:55:56,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 22:55:56,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 22:55:56,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-06-27 22:55:56,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-06-27 22:55:56,937 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 140 flow. Second operand 3 states and 88 transitions. [2024-06-27 22:55:56,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 59 transitions, 283 flow [2024-06-27 22:55:56,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 59 transitions, 280 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 22:55:56,941 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 149 flow [2024-06-27 22:55:56,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=137, 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=149, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2024-06-27 22:55:56,942 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2024-06-27 22:55:56,942 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 149 flow [2024-06-27 22:55:56,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:55:56,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:55:56,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:55:56,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 22:55:56,943 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 22:55:56,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:55:56,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1073467052, now seen corresponding path program 1 times [2024-06-27 22:55:56,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:55:56,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879881562] [2024-06-27 22:55:56,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:55:56,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:55:56,958 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-27 22:55:56,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868170121] [2024-06-27 22:55:56,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:55:56,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 22:55:56,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 22:55:56,959 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 22:55:56,961 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 22:55:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:55:57,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 22:55:57,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 22:55:57,074 INFO 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 22:55:57,074 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 22:55:57,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:55:57,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879881562] [2024-06-27 22:55:57,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-27 22:55:57,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868170121] [2024-06-27 22:55:57,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868170121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:55:57,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:55:57,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:55:57,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573623029] [2024-06-27 22:55:57,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:55:57,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 22:55:57,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:55:57,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 22:55:57,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 22:55:57,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-06-27 22:55:57,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 22:55:57,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:55:57,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-06-27 22:55:57,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:55:57,201 INFO L124 PetriNetUnfolderBase]: 535/1062 cut-off events. [2024-06-27 22:55:57,201 INFO L125 PetriNetUnfolderBase]: For 537/537 co-relation queries the response was YES. [2024-06-27 22:55:57,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2489 conditions, 1062 events. 535/1062 cut-off events. For 537/537 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 5147 event pairs, 247 based on Foata normal form. 81/1093 useless extension candidates. Maximal degree in co-relation 2477. Up to 521 conditions per place. [2024-06-27 22:55:57,207 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 43 selfloop transitions, 3 changer transitions 4/59 dead transitions. [2024-06-27 22:55:57,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 59 transitions, 296 flow [2024-06-27 22:55:57,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 22:55:57,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 22:55:57,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-27 22:55:57,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5271739130434783 [2024-06-27 22:55:57,209 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 149 flow. Second operand 4 states and 97 transitions. [2024-06-27 22:55:57,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 59 transitions, 296 flow [2024-06-27 22:55:57,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 59 transitions, 291 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 22:55:57,212 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 138 flow [2024-06-27 22:55:57,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-27 22:55:57,214 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2024-06-27 22:55:57,214 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 138 flow [2024-06-27 22:55:57,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 22:55:57,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:55:57,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:55:57,242 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 22:55:57,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 22:55:57,424 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 22:55:57,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:55:57,425 INFO L85 PathProgramCache]: Analyzing trace with hash 567408540, now seen corresponding path program 1 times [2024-06-27 22:55:57,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:55:57,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065674248] [2024-06-27 22:55:57,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:55:57,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:55:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:55:57,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:55:57,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065674248] [2024-06-27 22:55:57,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2024-06-27 22:55:57,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576221156] [2024-06-27 22:55:57,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:55:57,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 22:55:57,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 22:55:57,440 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 22:55:57,468 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 22:55:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:55:57,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-27 22:55:57,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 22:55:57,555 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 22:55:57,566 INFO 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 22:55:57,567 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 22:55:57,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576221156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:55:57,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:55:57,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:55:57,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416646897] [2024-06-27 22:55:57,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:55:57,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 22:55:57,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:55:57,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 22:55:57,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 22:55:57,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-06-27 22:55:57,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:55:57,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:55:57,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-06-27 22:55:57,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:55:57,630 INFO L124 PetriNetUnfolderBase]: 217/504 cut-off events. [2024-06-27 22:55:57,630 INFO L125 PetriNetUnfolderBase]: For 243/243 co-relation queries the response was YES. [2024-06-27 22:55:57,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1141 conditions, 504 events. 217/504 cut-off events. For 243/243 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2084 event pairs, 65 based on Foata normal form. 28/516 useless extension candidates. Maximal degree in co-relation 1128. Up to 224 conditions per place. [2024-06-27 22:55:57,633 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 31 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-27 22:55:57,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 215 flow [2024-06-27 22:55:57,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 22:55:57,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 22:55:57,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-06-27 22:55:57,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-27 22:55:57,634 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 138 flow. Second operand 3 states and 87 transitions. [2024-06-27 22:55:57,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 215 flow [2024-06-27 22:55:57,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 196 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 22:55:57,635 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 111 flow [2024-06-27 22:55:57,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2024-06-27 22:55:57,636 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-27 22:55:57,636 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 111 flow [2024-06-27 22:55:57,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:55:57,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:55:57,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:55:57,650 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 22:55:57,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 22:55:57,852 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 22:55:57,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:55:57,853 INFO L85 PathProgramCache]: Analyzing trace with hash -965190333, now seen corresponding path program 1 times [2024-06-27 22:55:57,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:55:57,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243611904] [2024-06-27 22:55:57,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:55:57,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:55:57,862 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-27 22:55:57,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369373333] [2024-06-27 22:55:57,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:55:57,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 22:55:57,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 22:55:57,864 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 22:55:57,888 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 22:55:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:55:57,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-27 22:55:57,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 22:55:57,975 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 22:55:58,093 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 22:55:58,197 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 22:55:58,205 INFO 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 22:55:58,205 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 22:55:58,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:55:58,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243611904] [2024-06-27 22:55:58,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-27 22:55:58,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369373333] [2024-06-27 22:55:58,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369373333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:55:58,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:55:58,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:55:58,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011650072] [2024-06-27 22:55:58,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:55:58,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:55:58,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:55:58,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:55:58,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:55:58,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-06-27 22:55:58,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 111 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:55:58,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:55:58,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-06-27 22:55:58,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:55:58,451 INFO L124 PetriNetUnfolderBase]: 269/629 cut-off events. [2024-06-27 22:55:58,451 INFO L125 PetriNetUnfolderBase]: For 219/219 co-relation queries the response was YES. [2024-06-27 22:55:58,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1338 conditions, 629 events. 269/629 cut-off events. For 219/219 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2616 event pairs, 32 based on Foata normal form. 11/627 useless extension candidates. Maximal degree in co-relation 1328. Up to 210 conditions per place. [2024-06-27 22:55:58,453 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 61 selfloop transitions, 8 changer transitions 4/84 dead transitions. [2024-06-27 22:55:58,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 84 transitions, 405 flow [2024-06-27 22:55:58,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:55:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:55:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 22:55:58,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5516304347826086 [2024-06-27 22:55:58,454 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 111 flow. Second operand 8 states and 203 transitions. [2024-06-27 22:55:58,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 84 transitions, 405 flow [2024-06-27 22:55:58,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 84 transitions, 375 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 22:55:58,456 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 154 flow [2024-06-27 22:55:58,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=154, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2024-06-27 22:55:58,457 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-27 22:55:58,457 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 154 flow [2024-06-27 22:55:58,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:55:58,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:55:58,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:55:58,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 22:55:58,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 22:55:58,668 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 22:55:58,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:55:58,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1172942659, now seen corresponding path program 2 times [2024-06-27 22:55:58,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:55:58,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184072591] [2024-06-27 22:55:58,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:55:58,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:55:58,677 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-27 22:55:58,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331268900] [2024-06-27 22:55:58,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 22:55:58,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 22:55:58,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 22:55:58,678 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 22:55:58,682 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 22:55:58,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-27 22:55:58,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 22:55:58,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-27 22:55:58,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 22:55:58,802 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 22:55:58,940 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 22:55:59,000 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 22:55:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:55:59,008 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 22:55:59,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:55:59,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184072591] [2024-06-27 22:55:59,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-27 22:55:59,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331268900] [2024-06-27 22:55:59,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331268900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:55:59,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:55:59,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:55:59,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844151269] [2024-06-27 22:55:59,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:55:59,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:55:59,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:55:59,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:55:59,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:55:59,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-06-27 22:55:59,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 154 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:55:59,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:55:59,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-06-27 22:55:59,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:55:59,254 INFO L124 PetriNetUnfolderBase]: 358/832 cut-off events. [2024-06-27 22:55:59,254 INFO L125 PetriNetUnfolderBase]: For 394/394 co-relation queries the response was YES. [2024-06-27 22:55:59,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1892 conditions, 832 events. 358/832 cut-off events. For 394/394 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3950 event pairs, 118 based on Foata normal form. 0/817 useless extension candidates. Maximal degree in co-relation 1878. Up to 415 conditions per place. [2024-06-27 22:55:59,257 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 55 selfloop transitions, 13 changer transitions 2/81 dead transitions. [2024-06-27 22:55:59,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 81 transitions, 426 flow [2024-06-27 22:55:59,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:55:59,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:55:59,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 22:55:59,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532608695652174 [2024-06-27 22:55:59,258 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 154 flow. Second operand 8 states and 196 transitions. [2024-06-27 22:55:59,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 81 transitions, 426 flow [2024-06-27 22:55:59,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 81 transitions, 419 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 22:55:59,260 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 246 flow [2024-06-27 22:55:59,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=246, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-27 22:55:59,261 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-06-27 22:55:59,261 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 246 flow [2024-06-27 22:55:59,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:55:59,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:55:59,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:55:59,280 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 22:55:59,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 22:55:59,472 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 22:55:59,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:55:59,473 INFO L85 PathProgramCache]: Analyzing trace with hash 703123951, now seen corresponding path program 3 times [2024-06-27 22:55:59,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:55:59,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173873449] [2024-06-27 22:55:59,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:55:59,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:55:59,481 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-27 22:55:59,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789371915] [2024-06-27 22:55:59,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 22:55:59,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 22:55:59,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 22:55:59,483 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 22:55:59,484 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 22:55:59,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-27 22:55:59,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 22:55:59,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-27 22:55:59,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 22:55:59,587 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 22:55:59,691 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 22:55:59,745 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 22:55:59,752 INFO 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 22:55:59,752 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 22:55:59,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:55:59,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173873449] [2024-06-27 22:55:59,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-27 22:55:59,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789371915] [2024-06-27 22:55:59,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789371915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:55:59,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:55:59,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:55:59,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036239573] [2024-06-27 22:55:59,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:55:59,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:55:59,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:55:59,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:55:59,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:55:59,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-06-27 22:55:59,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 246 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:55:59,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:55:59,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-06-27 22:55:59,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:56:00,011 INFO L124 PetriNetUnfolderBase]: 388/908 cut-off events. [2024-06-27 22:56:00,012 INFO L125 PetriNetUnfolderBase]: For 671/671 co-relation queries the response was YES. [2024-06-27 22:56:00,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2310 conditions, 908 events. 388/908 cut-off events. For 671/671 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4544 event pairs, 108 based on Foata normal form. 0/895 useless extension candidates. Maximal degree in co-relation 2292. Up to 490 conditions per place. [2024-06-27 22:56:00,016 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 64 selfloop transitions, 12 changer transitions 4/91 dead transitions. [2024-06-27 22:56:00,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 91 transitions, 544 flow [2024-06-27 22:56:00,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:56:00,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:56:00,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 22:56:00,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5271739130434783 [2024-06-27 22:56:00,017 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 246 flow. Second operand 8 states and 194 transitions. [2024-06-27 22:56:00,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 91 transitions, 544 flow [2024-06-27 22:56:00,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 528 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 22:56:00,022 INFO L231 Difference]: Finished difference. Result has 68 places, 56 transitions, 305 flow [2024-06-27 22:56:00,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=305, PETRI_PLACES=68, PETRI_TRANSITIONS=56} [2024-06-27 22:56:00,023 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-27 22:56:00,024 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 56 transitions, 305 flow [2024-06-27 22:56:00,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:56:00,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:56:00,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:56:00,042 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 22:56:00,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 22:56:00,236 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 22:56:00,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:56:00,237 INFO L85 PathProgramCache]: Analyzing trace with hash -454851541, now seen corresponding path program 4 times [2024-06-27 22:56:00,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:56:00,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355376542] [2024-06-27 22:56:00,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:56:00,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:56:00,245 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-27 22:56:00,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414761289] [2024-06-27 22:56:00,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 22:56:00,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 22:56:00,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 22:56:00,246 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 22:56:00,248 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 22:56:00,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 22:56:00,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 22:56:00,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 22:56:00,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 22:56:00,374 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 22:56:00,472 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 22:56:00,535 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 22:56:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:56:00,542 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 22:56:00,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:56:00,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355376542] [2024-06-27 22:56:00,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-27 22:56:00,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414761289] [2024-06-27 22:56:00,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414761289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:56:00,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:56:00,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:56:00,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378894112] [2024-06-27 22:56:00,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:56:00,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:56:00,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:56:00,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:56:00,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:56:00,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-06-27 22:56:00,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 56 transitions, 305 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:56:00,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:56:00,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-06-27 22:56:00,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:56:00,770 INFO L124 PetriNetUnfolderBase]: 436/1020 cut-off events. [2024-06-27 22:56:00,770 INFO L125 PetriNetUnfolderBase]: For 1079/1079 co-relation queries the response was YES. [2024-06-27 22:56:00,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2672 conditions, 1020 events. 436/1020 cut-off events. For 1079/1079 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5284 event pairs, 111 based on Foata normal form. 0/1007 useless extension candidates. Maximal degree in co-relation 2650. Up to 555 conditions per place. [2024-06-27 22:56:00,775 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 66 selfloop transitions, 15 changer transitions 2/94 dead transitions. [2024-06-27 22:56:00,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 94 transitions, 609 flow [2024-06-27 22:56:00,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:56:00,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:56:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 22:56:00,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5353260869565217 [2024-06-27 22:56:00,776 INFO L175 Difference]: Start difference. First operand has 68 places, 56 transitions, 305 flow. Second operand 8 states and 197 transitions. [2024-06-27 22:56:00,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 94 transitions, 609 flow [2024-06-27 22:56:00,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 94 transitions, 583 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 22:56:00,779 INFO L231 Difference]: Finished difference. Result has 75 places, 63 transitions, 392 flow [2024-06-27 22:56:00,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=392, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2024-06-27 22:56:00,780 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-27 22:56:00,780 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 392 flow [2024-06-27 22:56:00,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:56:00,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:56:00,780 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-06-27 22:56:00,799 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 22:56:00,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 22:56:00,999 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 22:56:00,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:56:00,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1428137841, now seen corresponding path program 1 times [2024-06-27 22:56:00,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:56:00,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695110837] [2024-06-27 22:56:00,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:56:00,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:56:01,013 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-27 22:56:01,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211015745] [2024-06-27 22:56:01,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:56:01,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 22:56:01,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 22:56:01,014 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 22:56:01,022 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 22:56:01,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 22:56:01,162 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 22:56:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 22:56:01,216 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 22:56:01,216 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 22:56:01,217 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 8 remaining) [2024-06-27 22:56:01,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 8 remaining) [2024-06-27 22:56:01,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 8 remaining) [2024-06-27 22:56:01,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 8 remaining) [2024-06-27 22:56:01,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 8 remaining) [2024-06-27 22:56:01,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2024-06-27 22:56:01,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2024-06-27 22:56:01,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2024-06-27 22:56:01,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 22:56:01,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-06-27 22:56:01,425 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:56:01,429 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 22:56:01,429 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 22:56:01,482 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-27 22:56:01,482 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-27 22:56:01,483 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 10:56:01 BasicIcfg [2024-06-27 22:56:01,483 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 22:56:01,483 INFO L158 Benchmark]: Toolchain (without parser) took 7816.80ms. Allocated memory was 188.7MB in the beginning and 314.6MB in the end (delta: 125.8MB). Free memory was 154.3MB in the beginning and 146.1MB in the end (delta: 8.2MB). Peak memory consumption was 133.9MB. Max. memory is 16.1GB. [2024-06-27 22:56:01,483 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 134.2MB. Free memory is still 97.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 22:56:01,483 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 134.2MB. Free memory is still 105.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 22:56:01,483 INFO L158 Benchmark]: CACSL2BoogieTranslator took 468.84ms. Allocated memory is still 188.7MB. Free memory was 154.3MB in the beginning and 127.3MB in the end (delta: 27.0MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-06-27 22:56:01,484 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.72ms. Allocated memory is still 188.7MB. Free memory was 127.3MB in the beginning and 125.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 22:56:01,484 INFO L158 Benchmark]: Boogie Preprocessor took 67.69ms. Allocated memory is still 188.7MB. Free memory was 125.3MB in the beginning and 122.7MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 22:56:01,484 INFO L158 Benchmark]: RCFGBuilder took 520.60ms. Allocated memory is still 188.7MB. Free memory was 122.7MB in the beginning and 143.8MB in the end (delta: -21.1MB). Peak memory consumption was 36.5MB. Max. memory is 16.1GB. [2024-06-27 22:56:01,484 INFO L158 Benchmark]: TraceAbstraction took 6702.87ms. Allocated memory was 188.7MB in the beginning and 314.6MB in the end (delta: 125.8MB). Free memory was 142.9MB in the beginning and 146.1MB in the end (delta: -3.2MB). Peak memory consumption was 122.6MB. Max. memory is 16.1GB. [2024-06-27 22:56:01,485 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.16ms. Allocated memory is still 134.2MB. Free memory is still 97.3MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.13ms. Allocated memory is still 134.2MB. Free memory is still 105.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 468.84ms. Allocated memory is still 188.7MB. Free memory was 154.3MB in the beginning and 127.3MB in the end (delta: 27.0MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.72ms. Allocated memory is still 188.7MB. Free memory was 127.3MB in the beginning and 125.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 67.69ms. Allocated memory is still 188.7MB. Free memory was 125.3MB in the beginning and 122.7MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 520.60ms. Allocated memory is still 188.7MB. Free memory was 122.7MB in the beginning and 143.8MB in the end (delta: -21.1MB). Peak memory consumption was 36.5MB. Max. memory is 16.1GB. * TraceAbstraction took 6702.87ms. Allocated memory was 188.7MB in the beginning and 314.6MB in the end (delta: 125.8MB). Free memory was 142.9MB in the beginning and 146.1MB in the end (delta: -3.2MB). Peak memory consumption was 122.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 746]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1] 0 //@ ghost int multithreaded = 0; [L1] 0 //@ ghost int m_locked = 0; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L683] 0 static unsigned int first; [L684] 0 static unsigned int next; [L685] 0 static int buffer_size; [L686] 0 _Bool send, receive; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L756] 0 pthread_t id1, id2; [L758] CALL 0 initLog(10) [L690] 0 buffer_size = max [L691] EXPR 0 next = 0 [L691] 0 first = next = 0 [L758] RET 0 initLog(10) [L759] 0 send=1 [L760] 0 receive=0 [L761] 0 //@ ghost multithreaded = 1; VAL [buffer={3:0}, buffer_size=10, first=0, id1=-1, m={4:0}, next=0, receive=0, send=1] [L761] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1=-1, m={4:0}, next=0, receive=0, send=1] [L762] 0 //@ assert (!multithreaded || (m_locked || ((((-1LL + (long long) receive) + (long long) send) >= 0LL) && (((1LL - (long long) receive) - (long long) send) >= 0LL)))); [L762] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1=-1, id2=0, m={4:0}, next=0, receive=0, send=1] [L739] 2 int i; [L740] 2 i=0 VAL [\old(arg)={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] COND TRUE 2 i<7 VAL [\old(arg)={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L742] 2 //@ ghost m_locked = 1; [L743] COND FALSE 2 !(\read(receive)) VAL [buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L750] 2 //@ ghost m_locked = 0; [L740] 2 i++ VAL [\old(arg)={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=1, m={4:0}, next=0, receive=0, send=1] [L723] 1 int i; [L724] 1 i=0 VAL [\old(arg)={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L724] COND TRUE 1 i<7 VAL [\old(arg)={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L726] 1 //@ ghost m_locked = 1; [L727] COND TRUE 1 \read(send) [L729] CALL 1 insertLogElement(i) [L707] COND TRUE 1 next < buffer_size && buffer_size > 0 [L709] 1 buffer[next] = b [L710] 1 next = (next+1)%buffer_size VAL [\old(b)=0, b=0, buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=1, receive=0, send=1] [L712] COND TRUE 1 next 0 && first < buffer_size [L697] 2 first++ [L698] EXPR 2 buffer[first-1] [L698] 2 return buffer[first-1]; [L745] RET, EXPR 2 removeLogElement() [L745] COND FALSE 2 !(removeLogElement()==i) [L746] 2 reach_error() VAL [\old(arg)={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=1, i=1, m={4:0}, next=1, receive=1, send=0] - UnprovableResult [Line: 762]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 763]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 762]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 761]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 68 locations, 8 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 6.6s, OverallIterations: 11, TraceHistogramMax: 2, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 427 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 374 mSDsluCounter, 129 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 111 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1740 IncrementalHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 18 mSDtfsCounter, 1740 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=392occurred in iteration=10, InterpolantAutomatonStates: 53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 221 NumberOfCodeBlocks, 221 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 160 ConstructedInterpolants, 1 QuantifiedInterpolants, 1873 SizeOfPredicates, 43 NumberOfNonLiveVariables, 1217 ConjunctsInSsa, 118 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-06-27 22:56:01,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE