./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/circular_buffer_ok.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i ./goblint.2024-06-19_11-23-25.files/protection/circular_buffer_ok.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 18:05:39,525 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:05:39,559 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:05:39,562 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:05:39,563 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:05:39,577 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:05:39,578 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:05:39,578 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:05:39,579 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:05:39,579 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:05:39,579 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:05:39,580 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:05:39,580 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:05:39,580 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:05:39,581 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:05:39,581 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:05:39,581 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:05:39,581 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:05:39,582 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:05:39,582 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:05:39,582 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:05:39,583 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:05:39,583 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:05:39,583 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:05:39,583 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:05:39,583 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:05:39,584 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:05:39,584 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:05:39,584 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:05:39,584 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:05:39,585 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:05:39,585 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:05:39,585 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:05:39,585 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:05:39,585 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:05:39,586 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:05:39,586 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:05:39,586 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:05:39,586 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:05:39,587 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:05:39,587 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:05:39,587 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:05:39,587 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:05:39,588 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:05:39,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:05:39,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:05:39,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:05:39,770 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:05:39,771 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:05:39,771 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2024-06-27 18:05:40,795 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:05:41,019 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:05:41,020 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2024-06-27 18:05:41,033 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb88f4c3d/5772c84bab9e4d13998bb47809616a7e/FLAG23fd0a251 [2024-06-27 18:05:41,046 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb88f4c3d/5772c84bab9e4d13998bb47809616a7e [2024-06-27 18:05:41,049 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:05:41,056 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:05:41,057 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/circular_buffer_ok.yml/witness.yml [2024-06-27 18:05:41,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:05:41,131 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:05:41,132 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:05:41,132 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:05:41,136 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:05:41,137 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:05:41" (1/2) ... [2024-06-27 18:05:41,138 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1849582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:05:41, skipping insertion in model container [2024-06-27 18:05:41,138 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:05:41" (1/2) ... [2024-06-27 18:05:41,139 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@26c43f67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:05:41, skipping insertion in model container [2024-06-27 18:05:41,139 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:05:41" (2/2) ... [2024-06-27 18:05:41,140 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1849582 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:41, skipping insertion in model container [2024-06-27 18:05:41,140 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:05:41" (2/2) ... [2024-06-27 18:05:41,140 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:05:41,160 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:05:41,161 INFO L97 edCorrectnessWitness]: Location invariant before [L764-L764] ! multithreaded || (0 <= value && value <= 6) [2024-06-27 18:05:41,161 INFO L97 edCorrectnessWitness]: Location invariant before [L765-L765] ! multithreaded || (0 <= value && value <= 6) [2024-06-27 18:05:41,161 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:05:41,161 INFO L103 edCorrectnessWitness]: ghost_variable m_locked = 0 [2024-06-27 18:05:41,161 INFO L106 edCorrectnessWitness]: ghost_update [L727-L727] m_locked = 1; [2024-06-27 18:05:41,161 INFO L106 edCorrectnessWitness]: ghost_update [L753-L753] m_locked = 0; [2024-06-27 18:05:41,161 INFO L106 edCorrectnessWitness]: ghost_update [L736-L736] m_locked = 0; [2024-06-27 18:05:41,161 INFO L106 edCorrectnessWitness]: ghost_update [L745-L745] m_locked = 1; [2024-06-27 18:05:41,162 INFO L106 edCorrectnessWitness]: ghost_update [L763-L763] multithreaded = 1; [2024-06-27 18:05:41,192 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:05:41,445 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30451,30464] [2024-06-27 18:05:41,455 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30681,30694] [2024-06-27 18:05:41,460 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30979,30992] [2024-06-27 18:05:41,471 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:05:41,479 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local [2024-06-27 18:05:41,542 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30451,30464] Start Parsing Local [2024-06-27 18:05:41,544 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30681,30694] Start Parsing Local Start Parsing Local [2024-06-27 18:05:41,549 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30979,30992] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:05:41,554 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:05:41,584 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:05:41,584 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:41 WrapperNode [2024-06-27 18:05:41,584 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:05:41,585 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:05:41,585 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:05:41,585 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:05:41,590 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:41" (1/1) ... [2024-06-27 18:05:41,602 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:41" (1/1) ... [2024-06-27 18:05:41,638 INFO L138 Inliner]: procedures = 168, calls = 28, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 146 [2024-06-27 18:05:41,638 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:05:41,639 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:05:41,639 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:05:41,639 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:05:41,647 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:41" (1/1) ... [2024-06-27 18:05:41,648 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:41" (1/1) ... [2024-06-27 18:05:41,650 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:41" (1/1) ... [2024-06-27 18:05:41,666 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 18:05:41,667 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:41" (1/1) ... [2024-06-27 18:05:41,667 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:41" (1/1) ... [2024-06-27 18:05:41,672 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:41" (1/1) ... [2024-06-27 18:05:41,674 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:41" (1/1) ... [2024-06-27 18:05:41,685 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:41" (1/1) ... [2024-06-27 18:05:41,686 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:41" (1/1) ... [2024-06-27 18:05:41,689 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:05:41,689 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:05:41,690 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:05:41,690 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:05:41,690 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:41" (1/1) ... [2024-06-27 18:05:41,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:05:41,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:41,722 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 18:05:41,728 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 18:05:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 18:05:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 18:05:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-06-27 18:05:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-06-27 18:05:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-27 18:05:41,749 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-27 18:05:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-27 18:05:41,750 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-27 18:05:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 18:05:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 18:05:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-06-27 18:05:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-06-27 18:05:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-06-27 18:05:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:05:41,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-06-27 18:05:41,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-06-27 18:05:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-06-27 18:05:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-06-27 18:05:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:05:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 18:05:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-27 18:05:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-06-27 18:05:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-06-27 18:05:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:05:41,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:05:41,757 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 18:05:41,865 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:05:41,866 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:05:42,085 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:05:42,085 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:05:42,182 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:05:42,183 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-27 18:05:42,183 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:05:42 BoogieIcfgContainer [2024-06-27 18:05:42,183 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:05:42,185 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:05:42,185 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:05:42,187 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:05:42,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:05:41" (1/4) ... [2024-06-27 18:05:42,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@324339fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:05:42, skipping insertion in model container [2024-06-27 18:05:42,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:05:41" (2/4) ... [2024-06-27 18:05:42,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@324339fe and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:05:42, skipping insertion in model container [2024-06-27 18:05:42,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:05:41" (3/4) ... [2024-06-27 18:05:42,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@324339fe and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:05:42, skipping insertion in model container [2024-06-27 18:05:42,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:05:42" (4/4) ... [2024-06-27 18:05:42,194 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_ok.i [2024-06-27 18:05:42,206 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:05:42,206 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 18:05:42,207 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:05:42,252 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 18:05:42,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 51 transitions, 116 flow [2024-06-27 18:05:42,308 INFO L124 PetriNetUnfolderBase]: 8/49 cut-off events. [2024-06-27 18:05:42,309 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 18:05:42,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 49 events. 8/49 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 125 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-06-27 18:05:42,311 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 51 transitions, 116 flow [2024-06-27 18:05:42,314 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 47 transitions, 103 flow [2024-06-27 18:05:42,323 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:05:42,328 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;@407ecc57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:05:42,329 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-06-27 18:05:42,332 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:05:42,333 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 18:05:42,333 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:05:42,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:42,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:05:42,334 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-06-27 18:05:42,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:42,338 INFO L85 PathProgramCache]: Analyzing trace with hash 377410168, now seen corresponding path program 1 times [2024-06-27 18:05:42,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:42,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041852368] [2024-06-27 18:05:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:42,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:42,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:42,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:42,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041852368] [2024-06-27 18:05:42,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041852368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:42,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:42,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:05:42,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438025032] [2024-06-27 18:05:42,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:42,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:05:42,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:42,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:05:42,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:05:42,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-27 18:05:42,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:42,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:42,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-27 18:05:42,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:42,880 INFO L124 PetriNetUnfolderBase]: 1011/1889 cut-off events. [2024-06-27 18:05:42,880 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-06-27 18:05:42,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3477 conditions, 1889 events. 1011/1889 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 10331 event pairs, 375 based on Foata normal form. 254/1912 useless extension candidates. Maximal degree in co-relation 3373. Up to 954 conditions per place. [2024-06-27 18:05:42,938 INFO L140 encePairwiseOnDemand]: 44/51 looper letters, 53 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2024-06-27 18:05:42,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 69 transitions, 263 flow [2024-06-27 18:05:42,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:05:42,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:05:42,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2024-06-27 18:05:42,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7254901960784313 [2024-06-27 18:05:42,948 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 103 flow. Second operand 3 states and 111 transitions. [2024-06-27 18:05:42,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 69 transitions, 263 flow [2024-06-27 18:05:42,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 69 transitions, 255 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:05:42,963 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 106 flow [2024-06-27 18:05:42,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2024-06-27 18:05:42,967 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 0 predicate places. [2024-06-27 18:05:42,968 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 106 flow [2024-06-27 18:05:42,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:42,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:42,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:42,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:05:42,968 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-06-27 18:05:42,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:42,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1432711596, now seen corresponding path program 1 times [2024-06-27 18:05:42,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:42,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795819996] [2024-06-27 18:05:42,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:42,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:42,984 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-27 18:05:42,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754865998] [2024-06-27 18:05:42,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:42,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:42,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:42,990 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 18:05:43,012 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 18:05:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:43,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2024-06-27 18:05:43,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:43,263 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 18:05:43,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:43,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795819996] [2024-06-27 18:05:43,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-27 18:05:43,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754865998] [2024-06-27 18:05:43,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754865998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:43,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:43,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:05:43,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201765256] [2024-06-27 18:05:43,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:43,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:05:43,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:43,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:05:43,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:05:43,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 18:05:43,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:43,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:43,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 18:05:43,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:43,469 INFO L124 PetriNetUnfolderBase]: 876/1651 cut-off events. [2024-06-27 18:05:43,469 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-06-27 18:05:43,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3155 conditions, 1651 events. 876/1651 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 8293 event pairs, 647 based on Foata normal form. 50/1522 useless extension candidates. Maximal degree in co-relation 2251. Up to 1366 conditions per place. [2024-06-27 18:05:43,477 INFO L140 encePairwiseOnDemand]: 49/51 looper letters, 28 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2024-06-27 18:05:43,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 43 transitions, 160 flow [2024-06-27 18:05:43,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:05:43,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:05:43,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-27 18:05:43,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228758169934641 [2024-06-27 18:05:43,480 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 106 flow. Second operand 3 states and 80 transitions. [2024-06-27 18:05:43,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 43 transitions, 160 flow [2024-06-27 18:05:43,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:05:43,483 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 102 flow [2024-06-27 18:05:43,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2024-06-27 18:05:43,484 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2024-06-27 18:05:43,484 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 102 flow [2024-06-27 18:05:43,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:43,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:43,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:43,497 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 18:05:43,692 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 18:05:43,693 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-06-27 18:05:43,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:43,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1464417898, now seen corresponding path program 1 times [2024-06-27 18:05:43,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:43,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733635105] [2024-06-27 18:05:43,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:43,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:43,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:43,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733635105] [2024-06-27 18:05:43,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733635105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:43,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:43,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:05:43,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532016457] [2024-06-27 18:05:43,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:43,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:05:43,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:43,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:05:43,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:05:43,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 18:05:43,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:43,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:43,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 18:05:43,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:44,040 INFO L124 PetriNetUnfolderBase]: 838/1607 cut-off events. [2024-06-27 18:05:44,041 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-06-27 18:05:44,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3037 conditions, 1607 events. 838/1607 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 7921 event pairs, 231 based on Foata normal form. 0/1457 useless extension candidates. Maximal degree in co-relation 3029. Up to 1006 conditions per place. [2024-06-27 18:05:44,048 INFO L140 encePairwiseOnDemand]: 48/51 looper letters, 47 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-06-27 18:05:44,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 243 flow [2024-06-27 18:05:44,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:05:44,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:05:44,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-06-27 18:05:44,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6535947712418301 [2024-06-27 18:05:44,053 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 102 flow. Second operand 3 states and 100 transitions. [2024-06-27 18:05:44,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 243 flow [2024-06-27 18:05:44,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:05:44,056 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 113 flow [2024-06-27 18:05:44,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=101, 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=113, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2024-06-27 18:05:44,057 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 1 predicate places. [2024-06-27 18:05:44,057 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 113 flow [2024-06-27 18:05:44,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:44,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:44,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:44,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:05:44,058 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-06-27 18:05:44,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:44,058 INFO L85 PathProgramCache]: Analyzing trace with hash 2011824655, now seen corresponding path program 1 times [2024-06-27 18:05:44,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:44,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780180944] [2024-06-27 18:05:44,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:44,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:44,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:44,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780180944] [2024-06-27 18:05:44,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780180944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:44,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:44,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:05:44,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357395024] [2024-06-27 18:05:44,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:44,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:05:44,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:44,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:05:44,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:05:44,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 18:05:44,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:44,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:44,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 18:05:44,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:44,299 INFO L124 PetriNetUnfolderBase]: 875/1722 cut-off events. [2024-06-27 18:05:44,299 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-06-27 18:05:44,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3330 conditions, 1722 events. 875/1722 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 8592 event pairs, 417 based on Foata normal form. 53/1628 useless extension candidates. Maximal degree in co-relation 3320. Up to 702 conditions per place. [2024-06-27 18:05:44,307 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 47 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2024-06-27 18:05:44,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 65 transitions, 266 flow [2024-06-27 18:05:44,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:05:44,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:05:44,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-06-27 18:05:44,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6797385620915033 [2024-06-27 18:05:44,309 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 113 flow. Second operand 3 states and 104 transitions. [2024-06-27 18:05:44,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 65 transitions, 266 flow [2024-06-27 18:05:44,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 65 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:05:44,311 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 131 flow [2024-06-27 18:05:44,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2024-06-27 18:05:44,312 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2024-06-27 18:05:44,312 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 131 flow [2024-06-27 18:05:44,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:44,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:44,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:44,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:05:44,313 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-06-27 18:05:44,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:44,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1473259345, now seen corresponding path program 1 times [2024-06-27 18:05:44,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:44,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791260262] [2024-06-27 18:05:44,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:44,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:44,326 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-27 18:05:44,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752016386] [2024-06-27 18:05:44,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:44,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:44,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:44,328 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 18:05:44,356 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 18:05:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:44,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 18:05:44,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:44,431 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 18:05:44,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:44,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791260262] [2024-06-27 18:05:44,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-27 18:05:44,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752016386] [2024-06-27 18:05:44,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752016386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:44,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:44,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:05:44,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342693333] [2024-06-27 18:05:44,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:44,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:05:44,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:44,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:05:44,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:05:44,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 18:05:44,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 131 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:44,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:44,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 18:05:44,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:44,691 INFO L124 PetriNetUnfolderBase]: 1104/2109 cut-off events. [2024-06-27 18:05:44,692 INFO L125 PetriNetUnfolderBase]: For 305/305 co-relation queries the response was YES. [2024-06-27 18:05:44,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4451 conditions, 2109 events. 1104/2109 cut-off events. For 305/305 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 11175 event pairs, 390 based on Foata normal form. 0/1944 useless extension candidates. Maximal degree in co-relation 4439. Up to 929 conditions per place. [2024-06-27 18:05:44,700 INFO L140 encePairwiseOnDemand]: 45/51 looper letters, 84 selfloop transitions, 6 changer transitions 0/103 dead transitions. [2024-06-27 18:05:44,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 103 transitions, 464 flow [2024-06-27 18:05:44,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:05:44,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:05:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-27 18:05:44,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6176470588235294 [2024-06-27 18:05:44,701 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 131 flow. Second operand 6 states and 189 transitions. [2024-06-27 18:05:44,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 103 transitions, 464 flow [2024-06-27 18:05:44,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 103 transitions, 455 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:05:44,705 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 155 flow [2024-06-27 18:05:44,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=155, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2024-06-27 18:05:44,707 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2024-06-27 18:05:44,707 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 155 flow [2024-06-27 18:05:44,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:44,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:44,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:44,721 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 18:05:44,919 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 18:05:44,919 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-06-27 18:05:44,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:44,920 INFO L85 PathProgramCache]: Analyzing trace with hash 365410484, now seen corresponding path program 1 times [2024-06-27 18:05:44,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:44,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369609733] [2024-06-27 18:05:44,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:44,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:44,930 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-27 18:05:44,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980371881] [2024-06-27 18:05:44,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:44,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:44,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:45,018 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 18:05:45,032 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 18:05:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:45,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-27 18:05:45,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:45,128 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 18:05:45,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:45,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369609733] [2024-06-27 18:05:45,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-27 18:05:45,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980371881] [2024-06-27 18:05:45,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980371881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:45,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:45,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:05:45,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519938311] [2024-06-27 18:05:45,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:45,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:05:45,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:45,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:05:45,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:05:45,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-27 18:05:45,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 155 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:45,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:45,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-27 18:05:45,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:45,445 INFO L124 PetriNetUnfolderBase]: 2213/4066 cut-off events. [2024-06-27 18:05:45,445 INFO L125 PetriNetUnfolderBase]: For 1223/1240 co-relation queries the response was YES. [2024-06-27 18:05:45,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9514 conditions, 4066 events. 2213/4066 cut-off events. For 1223/1240 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 24569 event pairs, 1018 based on Foata normal form. 226/4045 useless extension candidates. Maximal degree in co-relation 9500. Up to 1946 conditions per place. [2024-06-27 18:05:45,461 INFO L140 encePairwiseOnDemand]: 44/51 looper letters, 79 selfloop transitions, 7 changer transitions 0/98 dead transitions. [2024-06-27 18:05:45,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 98 transitions, 489 flow [2024-06-27 18:05:45,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:05:45,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:05:45,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 145 transitions. [2024-06-27 18:05:45,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7107843137254902 [2024-06-27 18:05:45,462 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 155 flow. Second operand 4 states and 145 transitions. [2024-06-27 18:05:45,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 98 transitions, 489 flow [2024-06-27 18:05:45,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 98 transitions, 482 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:05:45,466 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 222 flow [2024-06-27 18:05:45,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2024-06-27 18:05:45,467 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 13 predicate places. [2024-06-27 18:05:45,467 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 222 flow [2024-06-27 18:05:45,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:45,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:45,468 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:45,478 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 18:05:45,678 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 18:05:45,679 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-06-27 18:05:45,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:45,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1016540002, now seen corresponding path program 1 times [2024-06-27 18:05:45,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:45,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018110230] [2024-06-27 18:05:45,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:45,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:45,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:45,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018110230] [2024-06-27 18:05:45,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2024-06-27 18:05:45,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428585717] [2024-06-27 18:05:45,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:45,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:45,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:45,692 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 18:05:45,694 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 18:05:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:45,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2024-06-27 18:05:45,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:45,788 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 18:05:45,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428585717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:45,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:45,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:05:45,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117290613] [2024-06-27 18:05:45,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:45,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:05:45,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:45,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:05:45,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:05:45,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 18:05:45,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 222 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 18:05:45,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:45,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 18:05:45,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:46,009 INFO L124 PetriNetUnfolderBase]: 1419/2774 cut-off events. [2024-06-27 18:05:46,010 INFO L125 PetriNetUnfolderBase]: For 979/1009 co-relation queries the response was YES. [2024-06-27 18:05:46,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6449 conditions, 2774 events. 1419/2774 cut-off events. For 979/1009 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 14870 event pairs, 542 based on Foata normal form. 0/2608 useless extension candidates. Maximal degree in co-relation 6432. Up to 1282 conditions per place. [2024-06-27 18:05:46,022 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 48 selfloop transitions, 5 changer transitions 1/66 dead transitions. [2024-06-27 18:05:46,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 349 flow [2024-06-27 18:05:46,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:05:46,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:05:46,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-27 18:05:46,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6274509803921569 [2024-06-27 18:05:46,023 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 222 flow. Second operand 3 states and 96 transitions. [2024-06-27 18:05:46,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 349 flow [2024-06-27 18:05:46,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 66 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:05:46,027 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 199 flow [2024-06-27 18:05:46,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2024-06-27 18:05:46,028 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2024-06-27 18:05:46,028 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 199 flow [2024-06-27 18:05:46,028 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 18:05:46,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:46,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:46,042 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 18:05:46,239 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 18:05:46,240 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-06-27 18:05:46,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:46,240 INFO L85 PathProgramCache]: Analyzing trace with hash 458481333, now seen corresponding path program 1 times [2024-06-27 18:05:46,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:46,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593346570] [2024-06-27 18:05:46,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:46,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:46,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:46,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593346570] [2024-06-27 18:05:46,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2024-06-27 18:05:46,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551406933] [2024-06-27 18:05:46,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:46,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:46,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:46,263 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 18:05:46,280 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 18:05:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:46,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-27 18:05:46,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:46,375 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 18:05:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:46,393 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 18:05:46,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551406933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:46,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:46,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:05:46,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640887764] [2024-06-27 18:05:46,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:46,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:05:46,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:46,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:05:46,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:05:46,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 18:05:46,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:46,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:46,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 18:05:46,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:46,529 INFO L124 PetriNetUnfolderBase]: 791/1704 cut-off events. [2024-06-27 18:05:46,529 INFO L125 PetriNetUnfolderBase]: For 1014/1032 co-relation queries the response was YES. [2024-06-27 18:05:46,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4121 conditions, 1704 events. 791/1704 cut-off events. For 1014/1032 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 8043 event pairs, 240 based on Foata normal form. 103/1727 useless extension candidates. Maximal degree in co-relation 4104. Up to 801 conditions per place. [2024-06-27 18:05:46,536 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 44 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2024-06-27 18:05:46,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 62 transitions, 344 flow [2024-06-27 18:05:46,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:05:46,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:05:46,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-06-27 18:05:46,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6209150326797386 [2024-06-27 18:05:46,537 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 199 flow. Second operand 3 states and 95 transitions. [2024-06-27 18:05:46,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 62 transitions, 344 flow [2024-06-27 18:05:46,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 62 transitions, 334 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:05:46,540 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 197 flow [2024-06-27 18:05:46,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2024-06-27 18:05:46,540 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2024-06-27 18:05:46,540 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 197 flow [2024-06-27 18:05:46,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:46,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:46,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:46,554 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 18:05:46,752 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 18:05:46,752 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-06-27 18:05:46,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:46,752 INFO L85 PathProgramCache]: Analyzing trace with hash -573485969, now seen corresponding path program 1 times [2024-06-27 18:05:46,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:46,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329825797] [2024-06-27 18:05:46,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:46,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:46,761 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-27 18:05:46,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915455794] [2024-06-27 18:05:46,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:46,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:46,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:46,762 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 18:05:46,786 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 18:05:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:46,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 18:05:46,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:46,872 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 18:05:46,965 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 18:05:47,108 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 18:05:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:47,118 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 18:05:47,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:47,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329825797] [2024-06-27 18:05:47,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-27 18:05:47,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915455794] [2024-06-27 18:05:47,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915455794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:47,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:47,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:05:47,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263136925] [2024-06-27 18:05:47,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:47,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:05:47,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:47,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:05:47,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:05:47,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-06-27 18:05:47,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 197 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:47,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:47,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-06-27 18:05:47,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:47,450 INFO L124 PetriNetUnfolderBase]: 908/1854 cut-off events. [2024-06-27 18:05:47,450 INFO L125 PetriNetUnfolderBase]: For 1421/1421 co-relation queries the response was YES. [2024-06-27 18:05:47,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4885 conditions, 1854 events. 908/1854 cut-off events. For 1421/1421 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 8761 event pairs, 350 based on Foata normal form. 0/1797 useless extension candidates. Maximal degree in co-relation 4868. Up to 1098 conditions per place. [2024-06-27 18:05:47,458 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 82 selfloop transitions, 9 changer transitions 11/115 dead transitions. [2024-06-27 18:05:47,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 115 transitions, 609 flow [2024-06-27 18:05:47,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:05:47,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:05:47,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 18:05:47,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054466230936819 [2024-06-27 18:05:47,460 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 197 flow. Second operand 9 states and 232 transitions. [2024-06-27 18:05:47,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 115 transitions, 609 flow [2024-06-27 18:05:47,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 115 transitions, 592 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:05:47,464 INFO L231 Difference]: Finished difference. Result has 70 places, 54 transitions, 252 flow [2024-06-27 18:05:47,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=252, PETRI_PLACES=70, PETRI_TRANSITIONS=54} [2024-06-27 18:05:47,464 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 24 predicate places. [2024-06-27 18:05:47,464 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 54 transitions, 252 flow [2024-06-27 18:05:47,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:47,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:47,465 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:47,479 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 18:05:47,677 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 18:05:47,678 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-06-27 18:05:47,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:47,678 INFO L85 PathProgramCache]: Analyzing trace with hash 2086613974, now seen corresponding path program 1 times [2024-06-27 18:05:47,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:47,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222037299] [2024-06-27 18:05:47,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:47,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:47,688 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-27 18:05:47,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [642817802] [2024-06-27 18:05:47,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:47,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:47,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:47,690 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 18:05:47,692 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 18:05:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:47,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-27 18:05:47,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:47,863 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 18:05:47,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:47,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222037299] [2024-06-27 18:05:47,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-27 18:05:47,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642817802] [2024-06-27 18:05:47,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642817802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:47,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:47,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:05:47,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420229868] [2024-06-27 18:05:47,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:47,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:05:47,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:47,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:05:47,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:05:47,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-27 18:05:47,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 54 transitions, 252 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:47,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:47,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-27 18:05:47,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:48,003 INFO L124 PetriNetUnfolderBase]: 748/1573 cut-off events. [2024-06-27 18:05:48,003 INFO L125 PetriNetUnfolderBase]: For 1268/1277 co-relation queries the response was YES. [2024-06-27 18:05:48,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4069 conditions, 1573 events. 748/1573 cut-off events. For 1268/1277 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 7363 event pairs, 573 based on Foata normal form. 0/1513 useless extension candidates. Maximal degree in co-relation 4047. Up to 1269 conditions per place. [2024-06-27 18:05:48,008 INFO L140 encePairwiseOnDemand]: 49/51 looper letters, 36 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2024-06-27 18:05:48,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 49 transitions, 309 flow [2024-06-27 18:05:48,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:05:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:05:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-27 18:05:48,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49673202614379086 [2024-06-27 18:05:48,010 INFO L175 Difference]: Start difference. First operand has 70 places, 54 transitions, 252 flow. Second operand 3 states and 76 transitions. [2024-06-27 18:05:48,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 49 transitions, 309 flow [2024-06-27 18:05:48,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 49 transitions, 288 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 18:05:48,012 INFO L231 Difference]: Finished difference. Result has 63 places, 49 transitions, 216 flow [2024-06-27 18:05:48,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=63, PETRI_TRANSITIONS=49} [2024-06-27 18:05:48,013 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 17 predicate places. [2024-06-27 18:05:48,013 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 49 transitions, 216 flow [2024-06-27 18:05:48,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:48,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:48,014 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:48,030 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 18:05:48,226 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 18:05:48,226 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-06-27 18:05:48,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:48,226 INFO L85 PathProgramCache]: Analyzing trace with hash -871934504, now seen corresponding path program 1 times [2024-06-27 18:05:48,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:48,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760074320] [2024-06-27 18:05:48,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:48,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:48,237 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-27 18:05:48,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305123425] [2024-06-27 18:05:48,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:48,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:48,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:48,239 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 18:05:48,242 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 18:05:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:48,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 7 conjunts are in the unsatisfiable core [2024-06-27 18:05:48,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:48,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:48,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:48,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760074320] [2024-06-27 18:05:48,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-27 18:05:48,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305123425] [2024-06-27 18:05:48,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305123425] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:48,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-06-27 18:05:48,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2024-06-27 18:05:48,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921881345] [2024-06-27 18:05:48,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:48,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:05:48,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:48,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:05:48,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:05:48,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-27 18:05:48,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 49 transitions, 216 flow. Second operand has 8 states, 8 states have (on average 22.75) internal successors, (182), 8 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:48,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:48,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-27 18:05:48,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:49,116 INFO L124 PetriNetUnfolderBase]: 2171/4782 cut-off events. [2024-06-27 18:05:49,116 INFO L125 PetriNetUnfolderBase]: For 4657/4657 co-relation queries the response was YES. [2024-06-27 18:05:49,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11487 conditions, 4782 events. 2171/4782 cut-off events. For 4657/4657 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 29559 event pairs, 526 based on Foata normal form. 505/5223 useless extension candidates. Maximal degree in co-relation 11467. Up to 828 conditions per place. [2024-06-27 18:05:49,135 INFO L140 encePairwiseOnDemand]: 45/51 looper letters, 184 selfloop transitions, 18 changer transitions 2/216 dead transitions. [2024-06-27 18:05:49,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 216 transitions, 1265 flow [2024-06-27 18:05:49,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:05:49,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:05:49,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 380 transitions. [2024-06-27 18:05:49,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6773618538324421 [2024-06-27 18:05:49,138 INFO L175 Difference]: Start difference. First operand has 63 places, 49 transitions, 216 flow. Second operand 11 states and 380 transitions. [2024-06-27 18:05:49,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 216 transitions, 1265 flow [2024-06-27 18:05:49,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 216 transitions, 1264 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:05:49,143 INFO L231 Difference]: Finished difference. Result has 80 places, 66 transitions, 443 flow [2024-06-27 18:05:49,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=443, PETRI_PLACES=80, PETRI_TRANSITIONS=66} [2024-06-27 18:05:49,145 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 34 predicate places. [2024-06-27 18:05:49,145 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 66 transitions, 443 flow [2024-06-27 18:05:49,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.75) internal successors, (182), 8 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:49,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:49,145 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:49,162 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 18:05:49,357 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 18:05:49,357 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-06-27 18:05:49,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:49,358 INFO L85 PathProgramCache]: Analyzing trace with hash 879175267, now seen corresponding path program 1 times [2024-06-27 18:05:49,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:49,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145225151] [2024-06-27 18:05:49,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:49,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:49,370 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-27 18:05:49,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978711334] [2024-06-27 18:05:49,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:49,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:49,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:49,372 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:05:49,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 18:05:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:49,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 47 conjunts are in the unsatisfiable core [2024-06-27 18:05:49,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:49,598 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 18:05:49,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2024-06-27 18:05:50,071 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 32 treesize of output 23 [2024-06-27 18:05:50,219 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 31 treesize of output 23 [2024-06-27 18:05:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:50,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:06:40,854 WARN L293 SmtUtils]: Spent 19.44s on a formula simplification. DAG size of input: 252 DAG size of output: 243 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 18:06:58,705 WARN L293 SmtUtils]: Spent 11.25s on a formula simplification that was a NOOP. DAG size: 242 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 18:07:38,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:07:38,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:07:38,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145225151] [2024-06-27 18:07:38,046 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-27 18:07:38,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978711334] [2024-06-27 18:07:38,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978711334] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:07:38,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-06-27 18:07:38,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2024-06-27 18:07:38,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664081873] [2024-06-27 18:07:38,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-06-27 18:07:38,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 18:07:38,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:07:38,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 18:07:38,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2024-06-27 18:07:40,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 18:07:40,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 66 transitions, 443 flow. Second operand has 27 states, 27 states have (on average 15.444444444444445) internal successors, (417), 27 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:07:40,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:07:40,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 18:07:40,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:08:28,922 WARN L293 SmtUtils]: Spent 46.75s on a formula simplification. DAG size of input: 381 DAG size of output: 326 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 18:08:44,570 WARN L293 SmtUtils]: Spent 7.78s on a formula simplification that was a NOOP. DAG size: 311 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 18:09:33,894 WARN L293 SmtUtils]: Spent 45.77s on a formula simplification. DAG size of input: 335 DAG size of output: 285 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 18:09:43,874 WARN L293 SmtUtils]: Spent 7.96s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 18:10:17,558 WARN L293 SmtUtils]: Spent 31.34s on a formula simplification. DAG size of input: 437 DAG size of output: 138 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 18:10:29,621 WARN L293 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 298 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 18:11:21,468 WARN L293 SmtUtils]: Spent 50.08s on a formula simplification. DAG size of input: 340 DAG size of output: 302 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 18:11:28,780 WARN L293 SmtUtils]: Spent 5.09s on a formula simplification that was a NOOP. DAG size: 181 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 18:12:20,802 WARN L293 SmtUtils]: Spent 46.52s on a formula simplification. DAG size of input: 353 DAG size of output: 315 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 18:12:58,097 WARN L293 SmtUtils]: Spent 37.00s on a formula simplification. DAG size of input: 319 DAG size of output: 310 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 18:13:26,569 WARN L293 SmtUtils]: Spent 25.78s on a formula simplification. DAG size of input: 440 DAG size of output: 137 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 18:13:39,243 WARN L293 SmtUtils]: Spent 10.37s on a formula simplification that was a NOOP. DAG size: 172 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 18:14:04,761 WARN L293 SmtUtils]: Spent 23.32s on a formula simplification. DAG size of input: 437 DAG size of output: 134 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 18:14:36,684 WARN L293 SmtUtils]: Spent 24.28s on a formula simplification. DAG size of input: 379 DAG size of output: 120 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 18:15:03,635 WARN L293 SmtUtils]: Spent 24.22s on a formula simplification. DAG size of input: 369 DAG size of output: 348 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 18:15:06,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-06-27 18:15:30,521 WARN L293 SmtUtils]: Spent 23.27s on a formula simplification. DAG size of input: 372 DAG size of output: 348 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 18:15:53,582 WARN L293 SmtUtils]: Spent 21.21s on a formula simplification. DAG size of input: 384 DAG size of output: 121 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 18:16:31,374 WARN L293 SmtUtils]: Spent 36.59s on a formula simplification. DAG size of input: 369 DAG size of output: 353 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 18:17:27,747 WARN L293 SmtUtils]: Spent 43.74s on a formula simplification. DAG size of input: 385 DAG size of output: 312 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 18:17:29,682 INFO L124 PetriNetUnfolderBase]: 3686/7590 cut-off events. [2024-06-27 18:17:29,682 INFO L125 PetriNetUnfolderBase]: For 14586/14586 co-relation queries the response was YES. [2024-06-27 18:17:29,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21435 conditions, 7590 events. 3686/7590 cut-off events. For 14586/14586 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 50059 event pairs, 461 based on Foata normal form. 11/7546 useless extension candidates. Maximal degree in co-relation 21406. Up to 1841 conditions per place. [2024-06-27 18:17:29,713 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 232 selfloop transitions, 104 changer transitions 103/448 dead transitions. [2024-06-27 18:17:29,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 448 transitions, 2974 flow [2024-06-27 18:17:29,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-06-27 18:17:29,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-06-27 18:17:29,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 1028 transitions. [2024-06-27 18:17:29,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4113645458183273 [2024-06-27 18:17:29,723 INFO L175 Difference]: Start difference. First operand has 80 places, 66 transitions, 443 flow. Second operand 49 states and 1028 transitions. [2024-06-27 18:17:29,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 448 transitions, 2974 flow [2024-06-27 18:17:29,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 448 transitions, 2842 flow, removed 64 selfloop flow, removed 1 redundant places. [2024-06-27 18:17:29,762 INFO L231 Difference]: Finished difference. Result has 149 places, 152 transitions, 1414 flow [2024-06-27 18:17:29,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=1414, PETRI_PLACES=149, PETRI_TRANSITIONS=152} [2024-06-27 18:17:29,763 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 103 predicate places. [2024-06-27 18:17:29,764 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 152 transitions, 1414 flow [2024-06-27 18:17:29,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 15.444444444444445) internal successors, (417), 27 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:29,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:29,764 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:29,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-27 18:17:29,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:17:29,980 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-06-27 18:17:29,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:29,980 INFO L85 PathProgramCache]: Analyzing trace with hash 91214535, now seen corresponding path program 2 times [2024-06-27 18:17:29,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:29,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582790219] [2024-06-27 18:17:29,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:29,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:29,998 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-27 18:17:29,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043906903] [2024-06-27 18:17:29,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:17:29,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:17:29,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:17:30,000 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:17:30,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 18:17:30,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:17:30,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:17:30,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 45 conjunts are in the unsatisfiable core [2024-06-27 18:17:30,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:17:30,378 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 18:17:30,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2024-06-27 18:17:30,890 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 34 treesize of output 25 [2024-06-27 18:17:31,053 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 35 treesize of output 27 [2024-06-27 18:17:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:31,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:18:11,792 WARN L293 SmtUtils]: Spent 5.32s on a formula simplification that was a NOOP. DAG size: 259 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 18:18:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:18:48,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:18:48,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582790219] [2024-06-27 18:18:48,004 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-27 18:18:48,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043906903] [2024-06-27 18:18:48,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043906903] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:18:48,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-06-27 18:18:48,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2024-06-27 18:18:48,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183872423] [2024-06-27 18:18:48,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-06-27 18:18:48,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 18:18:48,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:18:48,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 18:18:48,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2024-06-27 18:18:53,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-06-27 18:18:57,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-06-27 18:19:01,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-06-27 18:19:01,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 18:19:01,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 152 transitions, 1414 flow. Second operand has 26 states, 26 states have (on average 14.538461538461538) internal successors, (378), 26 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:19:01,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:19:01,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 18:19:01,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:19:35,283 WARN L293 SmtUtils]: Spent 23.12s on a formula simplification. DAG size of input: 433 DAG size of output: 281 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15