./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack_longer-2.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/mutex-meet/stack_longer-2.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 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/stack_longer-2.i ./goblint.2024-05-07_14-17-48.files/mutex-meet/stack_longer-2.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-wip.fs.witness-ghost-b44c828-m [2024-05-12 10:32:29,277 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 10:32:29,338 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 10:32:29,343 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 10:32:29,344 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 10:32:29,371 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 10:32:29,372 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 10:32:29,373 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 10:32:29,373 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 10:32:29,376 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 10:32:29,377 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 10:32:29,377 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 10:32:29,377 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 10:32:29,378 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 10:32:29,379 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 10:32:29,379 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 10:32:29,379 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 10:32:29,379 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 10:32:29,380 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 10:32:29,380 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 10:32:29,380 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 10:32:29,380 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 10:32:29,381 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 10:32:29,381 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 10:32:29,381 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 10:32:29,381 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 10:32:29,381 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 10:32:29,382 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 10:32:29,382 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 10:32:29,382 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 10:32:29,383 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 10:32:29,383 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 10:32:29,384 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:32:29,384 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 10:32:29,384 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 10:32:29,384 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 10:32:29,384 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 10:32:29,385 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 10:32:29,385 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 10:32:29,385 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 10:32:29,385 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 10:32:29,386 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 10:32:29,386 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 10:32:29,386 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 10:32:29,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 10:32:29,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 10:32:29,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 10:32:29,644 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 10:32:29,645 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 10:32:29,646 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-2.i [2024-05-12 10:32:30,701 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 10:32:30,913 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 10:32:30,914 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i [2024-05-12 10:32:30,930 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b34c627c/0857ee266d57432e95f8b803fc28adbd/FLAG3f93761fa [2024-05-12 10:32:30,940 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b34c627c/0857ee266d57432e95f8b803fc28adbd [2024-05-12 10:32:30,942 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 10:32:30,942 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 10:32:30,943 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/mutex-meet/stack_longer-2.yml/witness.yml [2024-05-12 10:32:31,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 10:32:31,038 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 10:32:31,038 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 10:32:31,038 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 10:32:31,045 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 10:32:31,046 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:32:30" (1/2) ... [2024-05-12 10:32:31,047 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d39c616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:32:31, skipping insertion in model container [2024-05-12 10:32:31,047 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:32:30" (1/2) ... [2024-05-12 10:32:31,048 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@222bd8f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:32:31, skipping insertion in model container [2024-05-12 10:32:31,048 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:32:31" (2/2) ... [2024-05-12 10:32:31,051 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d39c616 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:32:31, skipping insertion in model container [2024-05-12 10:32:31,051 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:32:31" (2/2) ... [2024-05-12 10:32:31,051 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 10:32:31,083 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 10:32:31,084 INFO L97 edCorrectnessWitness]: Location invariant before [L1023-L1023] ((! multithreaded || (m_locked || flag == (_Bool)0)) && (! multithreaded || (m_locked || ((0LL - (long long )flag) + (long long )top >= 0LL && (long long )flag + (long long )top >= 0LL)))) && (! multithreaded || flag == (_Bool)0) [2024-05-12 10:32:31,084 INFO L97 edCorrectnessWitness]: Location invariant before [L1022-L1022] ((! multithreaded || (m_locked || flag == (_Bool)0)) && (! multithreaded || (m_locked || ((0LL - (long long )flag) + (long long )top >= 0LL && (long long )flag + (long long )top >= 0LL)))) && (! multithreaded || flag == (_Bool)0) [2024-05-12 10:32:31,084 INFO L103 edCorrectnessWitness]: ghost_variable m_locked = 0 [2024-05-12 10:32:31,084 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 10:32:31,085 INFO L106 edCorrectnessWitness]: ghost_update [L993-L993] m_locked = 1; [2024-05-12 10:32:31,085 INFO L106 edCorrectnessWitness]: ghost_update [L998-L998] m_locked = 0; [2024-05-12 10:32:31,085 INFO L106 edCorrectnessWitness]: ghost_update [L1021-L1021] multithreaded = 1; [2024-05-12 10:32:31,086 INFO L106 edCorrectnessWitness]: ghost_update [L1007-L1007] m_locked = 1; [2024-05-12 10:32:31,086 INFO L106 edCorrectnessWitness]: ghost_update [L1013-L1013] m_locked = 0; [2024-05-12 10:32:31,126 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 10:32:31,451 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i[41529,41542] [2024-05-12 10:32:31,485 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:32:31,494 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local [2024-05-12 10:32:31,548 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i[41529,41542] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 10:32:31,562 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:32:31,665 INFO L206 MainTranslator]: Completed translation [2024-05-12 10:32:31,666 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:32:31 WrapperNode [2024-05-12 10:32:31,666 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 10:32:31,667 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 10:32:31,667 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 10:32:31,667 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 10:32:31,672 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 12.05 10:32:31" (1/1) ... [2024-05-12 10:32:31,686 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 12.05 10:32:31" (1/1) ... [2024-05-12 10:32:31,708 INFO L138 Inliner]: procedures = 278, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 168 [2024-05-12 10:32:31,711 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 10:32:31,712 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 10:32:31,712 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 10:32:31,712 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 10:32:31,722 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:32:31" (1/1) ... [2024-05-12 10:32:31,722 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:32:31" (1/1) ... [2024-05-12 10:32:31,727 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:32:31" (1/1) ... [2024-05-12 10:32:31,746 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 3, 5, 2, 2]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0, 0]. The 4 writes are split as follows [0, 2, 0, 1, 1]. [2024-05-12 10:32:31,746 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:32:31" (1/1) ... [2024-05-12 10:32:31,747 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:32:31" (1/1) ... [2024-05-12 10:32:31,752 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:32:31" (1/1) ... [2024-05-12 10:32:31,755 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:32:31" (1/1) ... [2024-05-12 10:32:31,757 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:32:31" (1/1) ... [2024-05-12 10:32:31,758 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:32:31" (1/1) ... [2024-05-12 10:32:31,760 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 10:32:31,761 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 10:32:31,761 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 10:32:31,761 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 10:32:31,762 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:32:31" (1/1) ... [2024-05-12 10:32:31,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:32:31,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:32:31,785 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) [2024-05-12 10:32:31,786 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 [2024-05-12 10:32:31,809 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-05-12 10:32:31,809 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-05-12 10:32:31,810 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-05-12 10:32:31,810 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-05-12 10:32:31,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 10:32:31,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 10:32:31,810 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-05-12 10:32:31,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-05-12 10:32:31,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-05-12 10:32:31,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-05-12 10:32:31,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-05-12 10:32:31,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-05-12 10:32:31,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 10:32:31,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 10:32:31,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 10:32:31,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 10:32:31,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-05-12 10:32:31,812 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-05-12 10:32:31,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 10:32:31,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 10:32:31,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 10:32:31,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 10:32:31,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 10:32:31,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-05-12 10:32:31,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 10:32:31,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 10:32:31,814 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 10:32:31,924 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 10:32:31,926 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 10:32:32,160 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 10:32:32,160 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 10:32:32,291 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 10:32:32,291 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-05-12 10:32:32,291 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:32:32 BoogieIcfgContainer [2024-05-12 10:32:32,291 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 10:32:32,293 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 10:32:32,293 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 10:32:32,295 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 10:32:32,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 10:32:30" (1/4) ... [2024-05-12 10:32:32,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ad5e59a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 10:32:32, skipping insertion in model container [2024-05-12 10:32:32,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:32:31" (2/4) ... [2024-05-12 10:32:32,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ad5e59a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:32:32, skipping insertion in model container [2024-05-12 10:32:32,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:32:31" (3/4) ... [2024-05-12 10:32:32,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ad5e59a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:32:32, skipping insertion in model container [2024-05-12 10:32:32,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:32:32" (4/4) ... [2024-05-12 10:32:32,297 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2024-05-12 10:32:32,336 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 10:32:32,336 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-05-12 10:32:32,336 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 10:32:32,396 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-05-12 10:32:32,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 41 transitions, 96 flow [2024-05-12 10:32:32,456 INFO L124 PetriNetUnfolderBase]: 5/39 cut-off events. [2024-05-12 10:32:32,457 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-05-12 10:32:32,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 39 events. 5/39 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 72 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2024-05-12 10:32:32,462 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 41 transitions, 96 flow [2024-05-12 10:32:32,465 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 37 transitions, 83 flow [2024-05-12 10:32:32,476 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 10:32:32,484 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;@8cd37b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 10:32:32,484 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-05-12 10:32:32,490 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 10:32:32,491 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-05-12 10:32:32,492 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:32:32,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:32,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 10:32:32,493 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-05-12 10:32:32,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:32,497 INFO L85 PathProgramCache]: Analyzing trace with hash -182247812, now seen corresponding path program 1 times [2024-05-12 10:32:32,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:32,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630940982] [2024-05-12 10:32:32,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:32,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:32,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:32,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:32,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630940982] [2024-05-12 10:32:32,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630940982] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:32:32,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:32:32,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 10:32:32,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635167366] [2024-05-12 10:32:32,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:32:32,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 10:32:32,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:32,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 10:32:32,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 10:32:32,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-05-12 10:32:32,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-05-12 10:32:32,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:32,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-05-12 10:32:32,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:33,178 INFO L124 PetriNetUnfolderBase]: 589/1021 cut-off events. [2024-05-12 10:32:33,179 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-05-12 10:32:33,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2004 conditions, 1021 events. 589/1021 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4856 event pairs, 226 based on Foata normal form. 76/952 useless extension candidates. Maximal degree in co-relation 1869. Up to 753 conditions per place. [2024-05-12 10:32:33,190 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 39 selfloop transitions, 2 changer transitions 3/50 dead transitions. [2024-05-12 10:32:33,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 203 flow [2024-05-12 10:32:33,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 10:32:33,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 10:32:33,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-05-12 10:32:33,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-05-12 10:32:33,203 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 83 flow. Second operand 3 states and 73 transitions. [2024-05-12 10:32:33,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 203 flow [2024-05-12 10:32:33,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 50 transitions, 195 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 10:32:33,213 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 90 flow [2024-05-12 10:32:33,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2024-05-12 10:32:33,218 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2024-05-12 10:32:33,218 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 90 flow [2024-05-12 10:32:33,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-05-12 10:32:33,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:33,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:33,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 10:32:33,219 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-05-12 10:32:33,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:33,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1518514330, now seen corresponding path program 1 times [2024-05-12 10:32:33,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:33,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016245734] [2024-05-12 10:32:33,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:33,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:33,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:33,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016245734] [2024-05-12 10:32:33,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016245734] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:32:33,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:32:33,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:32:33,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609949480] [2024-05-12 10:32:33,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:32:33,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:32:33,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:33,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:32:33,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:32:33,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-05-12 10:32:33,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:33,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:33,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-05-12 10:32:33,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:33,583 INFO L124 PetriNetUnfolderBase]: 705/1323 cut-off events. [2024-05-12 10:32:33,584 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2024-05-12 10:32:33,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2676 conditions, 1323 events. 705/1323 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7155 event pairs, 263 based on Foata normal form. 41/1265 useless extension candidates. Maximal degree in co-relation 1280. Up to 608 conditions per place. [2024-05-12 10:32:33,590 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 48 selfloop transitions, 6 changer transitions 0/60 dead transitions. [2024-05-12 10:32:33,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 60 transitions, 256 flow [2024-05-12 10:32:33,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:32:33,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:32:33,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-05-12 10:32:33,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-05-12 10:32:33,596 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 90 flow. Second operand 5 states and 94 transitions. [2024-05-12 10:32:33,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 60 transitions, 256 flow [2024-05-12 10:32:33,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 60 transitions, 253 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 10:32:33,599 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 129 flow [2024-05-12 10:32:33,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2024-05-12 10:32:33,600 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2024-05-12 10:32:33,600 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 129 flow [2024-05-12 10:32:33,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:33,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:33,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:33,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 10:32:33,601 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-05-12 10:32:33,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:33,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1548127593, now seen corresponding path program 1 times [2024-05-12 10:32:33,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:33,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648796139] [2024-05-12 10:32:33,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:33,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:33,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:33,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648796139] [2024-05-12 10:32:33,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648796139] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:32:33,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:32:33,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:32:33,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286859126] [2024-05-12 10:32:33,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:32:33,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:32:33,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:33,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:32:33,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:32:33,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-05-12 10:32:33,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2024-05-12 10:32:33,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:33,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-05-12 10:32:33,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:33,899 INFO L124 PetriNetUnfolderBase]: 767/1392 cut-off events. [2024-05-12 10:32:33,900 INFO L125 PetriNetUnfolderBase]: For 680/685 co-relation queries the response was YES. [2024-05-12 10:32:33,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3338 conditions, 1392 events. 767/1392 cut-off events. For 680/685 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7449 event pairs, 155 based on Foata normal form. 4/1264 useless extension candidates. Maximal degree in co-relation 2538. Up to 945 conditions per place. [2024-05-12 10:32:33,907 INFO L140 encePairwiseOnDemand]: 37/41 looper letters, 57 selfloop transitions, 3 changer transitions 3/71 dead transitions. [2024-05-12 10:32:33,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 71 transitions, 350 flow [2024-05-12 10:32:33,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:32:33,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:32:33,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-05-12 10:32:33,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-05-12 10:32:33,912 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 129 flow. Second operand 4 states and 97 transitions. [2024-05-12 10:32:33,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 71 transitions, 350 flow [2024-05-12 10:32:33,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 71 transitions, 347 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 10:32:33,916 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 140 flow [2024-05-12 10:32:33,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-05-12 10:32:33,917 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 7 predicate places. [2024-05-12 10:32:33,917 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 140 flow [2024-05-12 10:32:33,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2024-05-12 10:32:33,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:33,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:33,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 10:32:33,919 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-05-12 10:32:33,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:33,920 INFO L85 PathProgramCache]: Analyzing trace with hash -996580937, now seen corresponding path program 1 times [2024-05-12 10:32:33,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:33,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919244236] [2024-05-12 10:32:33,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:33,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:34,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:34,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919244236] [2024-05-12 10:32:34,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919244236] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:32:34,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:32:34,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:32:34,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260263691] [2024-05-12 10:32:34,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:32:34,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:32:34,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:34,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:32:34,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:32:34,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-05-12 10:32:34,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2024-05-12 10:32:34,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:34,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-05-12 10:32:34,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:34,275 INFO L124 PetriNetUnfolderBase]: 959/1731 cut-off events. [2024-05-12 10:32:34,276 INFO L125 PetriNetUnfolderBase]: For 1072/1072 co-relation queries the response was YES. [2024-05-12 10:32:34,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4205 conditions, 1731 events. 959/1731 cut-off events. For 1072/1072 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9165 event pairs, 321 based on Foata normal form. 109/1737 useless extension candidates. Maximal degree in co-relation 3405. Up to 878 conditions per place. [2024-05-12 10:32:34,282 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 52 selfloop transitions, 4 changer transitions 3/64 dead transitions. [2024-05-12 10:32:34,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 64 transitions, 332 flow [2024-05-12 10:32:34,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:32:34,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:32:34,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2024-05-12 10:32:34,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-05-12 10:32:34,284 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 140 flow. Second operand 4 states and 80 transitions. [2024-05-12 10:32:34,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 64 transitions, 332 flow [2024-05-12 10:32:34,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 64 transitions, 327 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 10:32:34,286 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 151 flow [2024-05-12 10:32:34,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2024-05-12 10:32:34,287 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 8 predicate places. [2024-05-12 10:32:34,287 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 151 flow [2024-05-12 10:32:34,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2024-05-12 10:32:34,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:34,287 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:34,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 10:32:34,288 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-05-12 10:32:34,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:34,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1140494332, now seen corresponding path program 1 times [2024-05-12 10:32:34,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:34,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440586520] [2024-05-12 10:32:34,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:34,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:34,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:34,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440586520] [2024-05-12 10:32:34,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440586520] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:32:34,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204536253] [2024-05-12 10:32:34,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:34,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:32:34,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:32:34,356 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) [2024-05-12 10:32:34,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-05-12 10:32:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:34,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjunts are in the unsatisfiable core [2024-05-12 10:32:34,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:32:34,523 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 8 treesize of output 1 [2024-05-12 10:32:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:34,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:32:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:34,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204536253] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:32:34,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:32:34,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-05-12 10:32:34,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971840430] [2024-05-12 10:32:34,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:32:34,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:32:34,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:34,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:32:34,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:32:34,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-05-12 10:32:34,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 151 flow. Second operand has 9 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:34,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:34,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-05-12 10:32:34,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:35,337 INFO L124 PetriNetUnfolderBase]: 2913/5184 cut-off events. [2024-05-12 10:32:35,338 INFO L125 PetriNetUnfolderBase]: For 3853/3858 co-relation queries the response was YES. [2024-05-12 10:32:35,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13385 conditions, 5184 events. 2913/5184 cut-off events. For 3853/3858 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 31487 event pairs, 459 based on Foata normal form. 37/5030 useless extension candidates. Maximal degree in co-relation 11961. Up to 1028 conditions per place. [2024-05-12 10:32:35,362 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 227 selfloop transitions, 33 changer transitions 6/271 dead transitions. [2024-05-12 10:32:35,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 271 transitions, 1497 flow [2024-05-12 10:32:35,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-05-12 10:32:35,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-05-12 10:32:35,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 371 transitions. [2024-05-12 10:32:35,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6032520325203252 [2024-05-12 10:32:35,364 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 151 flow. Second operand 15 states and 371 transitions. [2024-05-12 10:32:35,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 271 transitions, 1497 flow [2024-05-12 10:32:35,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 271 transitions, 1470 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-05-12 10:32:35,370 INFO L231 Difference]: Finished difference. Result has 67 places, 73 transitions, 426 flow [2024-05-12 10:32:35,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=426, PETRI_PLACES=67, PETRI_TRANSITIONS=73} [2024-05-12 10:32:35,371 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 28 predicate places. [2024-05-12 10:32:35,371 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 73 transitions, 426 flow [2024-05-12 10:32:35,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:35,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:35,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:35,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-05-12 10:32:35,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:32:35,591 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-05-12 10:32:35,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:35,592 INFO L85 PathProgramCache]: Analyzing trace with hash 283111612, now seen corresponding path program 1 times [2024-05-12 10:32:35,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:35,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107706747] [2024-05-12 10:32:35,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:35,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:35,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:35,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107706747] [2024-05-12 10:32:35,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107706747] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:32:35,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:32:35,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:32:35,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346728592] [2024-05-12 10:32:35,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:32:35,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 10:32:35,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:35,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 10:32:35,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 10:32:35,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-05-12 10:32:35,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 73 transitions, 426 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2024-05-12 10:32:35,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:35,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-05-12 10:32:35,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:35,835 INFO L124 PetriNetUnfolderBase]: 1204/2343 cut-off events. [2024-05-12 10:32:35,835 INFO L125 PetriNetUnfolderBase]: For 2280/2280 co-relation queries the response was YES. [2024-05-12 10:32:35,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6055 conditions, 2343 events. 1204/2343 cut-off events. For 2280/2280 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 13201 event pairs, 442 based on Foata normal form. 105/2421 useless extension candidates. Maximal degree in co-relation 5832. Up to 1078 conditions per place. [2024-05-12 10:32:35,879 INFO L140 encePairwiseOnDemand]: 37/41 looper letters, 52 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2024-05-12 10:32:35,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 67 transitions, 432 flow [2024-05-12 10:32:35,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 10:32:35,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 10:32:35,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-05-12 10:32:35,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-05-12 10:32:35,881 INFO L175 Difference]: Start difference. First operand has 67 places, 73 transitions, 426 flow. Second operand 3 states and 72 transitions. [2024-05-12 10:32:35,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 67 transitions, 432 flow [2024-05-12 10:32:35,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 67 transitions, 387 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-05-12 10:32:35,891 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 254 flow [2024-05-12 10:32:35,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-05-12 10:32:35,893 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 21 predicate places. [2024-05-12 10:32:35,893 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 254 flow [2024-05-12 10:32:35,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2024-05-12 10:32:35,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:35,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:35,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 10:32:35,894 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-05-12 10:32:35,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:35,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1309779345, now seen corresponding path program 1 times [2024-05-12 10:32:35,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:35,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999463342] [2024-05-12 10:32:35,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:35,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:36,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:36,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999463342] [2024-05-12 10:32:36,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999463342] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:32:36,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:32:36,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:32:36,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648089430] [2024-05-12 10:32:36,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:32:36,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:32:36,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:36,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:32:36,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:32:36,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-05-12 10:32:36,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:36,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:36,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-05-12 10:32:36,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:36,599 INFO L124 PetriNetUnfolderBase]: 1465/2766 cut-off events. [2024-05-12 10:32:36,599 INFO L125 PetriNetUnfolderBase]: For 2135/2135 co-relation queries the response was YES. [2024-05-12 10:32:36,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6733 conditions, 2766 events. 1465/2766 cut-off events. For 2135/2135 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 15371 event pairs, 441 based on Foata normal form. 0/2737 useless extension candidates. Maximal degree in co-relation 6144. Up to 1343 conditions per place. [2024-05-12 10:32:36,611 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 69 selfloop transitions, 14 changer transitions 9/97 dead transitions. [2024-05-12 10:32:36,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 97 transitions, 576 flow [2024-05-12 10:32:36,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:32:36,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:32:36,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-05-12 10:32:36,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707317073170731 [2024-05-12 10:32:36,613 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 254 flow. Second operand 5 states and 117 transitions. [2024-05-12 10:32:36,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 97 transitions, 576 flow [2024-05-12 10:32:36,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 97 transitions, 554 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 10:32:36,618 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 348 flow [2024-05-12 10:32:36,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=348, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2024-05-12 10:32:36,618 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 26 predicate places. [2024-05-12 10:32:36,618 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 348 flow [2024-05-12 10:32:36,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:36,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:36,619 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] [2024-05-12 10:32:36,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 10:32:36,619 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-05-12 10:32:36,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:36,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1660380228, now seen corresponding path program 1 times [2024-05-12 10:32:36,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:36,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777232233] [2024-05-12 10:32:36,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:36,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:36,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:36,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777232233] [2024-05-12 10:32:36,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777232233] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:32:36,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333575118] [2024-05-12 10:32:36,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:36,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:32:36,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:32:36,949 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) [2024-05-12 10:32:36,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-05-12 10:32:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:37,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 13 conjunts are in the unsatisfiable core [2024-05-12 10:32:37,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:32:37,088 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 8 treesize of output 1 [2024-05-12 10:32:37,147 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 25 treesize of output 1 [2024-05-12 10:32:37,212 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 80 treesize of output 32 [2024-05-12 10:32:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:37,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:32:37,512 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 9 treesize of output 1 [2024-05-12 10:32:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:37,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333575118] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:32:37,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:32:37,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-05-12 10:32:37,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066237305] [2024-05-12 10:32:37,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:32:37,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-05-12 10:32:37,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:37,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-05-12 10:32:37,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2024-05-12 10:32:37,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-05-12 10:32:37,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 348 flow. Second operand has 14 states, 14 states have (on average 13.5) internal successors, (189), 14 states have internal predecessors, (189), 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) [2024-05-12 10:32:37,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:37,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-05-12 10:32:37,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:38,470 INFO L124 PetriNetUnfolderBase]: 2943/5544 cut-off events. [2024-05-12 10:32:38,471 INFO L125 PetriNetUnfolderBase]: For 6059/6059 co-relation queries the response was YES. [2024-05-12 10:32:38,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13386 conditions, 5544 events. 2943/5544 cut-off events. For 6059/6059 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 33354 event pairs, 367 based on Foata normal form. 11/5526 useless extension candidates. Maximal degree in co-relation 11721. Up to 824 conditions per place. [2024-05-12 10:32:38,498 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 219 selfloop transitions, 50 changer transitions 27/301 dead transitions. [2024-05-12 10:32:38,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 301 transitions, 1758 flow [2024-05-12 10:32:38,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-05-12 10:32:38,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-05-12 10:32:38,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 445 transitions. [2024-05-12 10:32:38,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5712451861360719 [2024-05-12 10:32:38,501 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 348 flow. Second operand 19 states and 445 transitions. [2024-05-12 10:32:38,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 301 transitions, 1758 flow [2024-05-12 10:32:38,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 301 transitions, 1752 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-05-12 10:32:38,518 INFO L231 Difference]: Finished difference. Result has 84 places, 92 transitions, 716 flow [2024-05-12 10:32:38,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=716, PETRI_PLACES=84, PETRI_TRANSITIONS=92} [2024-05-12 10:32:38,520 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 45 predicate places. [2024-05-12 10:32:38,521 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 92 transitions, 716 flow [2024-05-12 10:32:38,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 14 states have internal predecessors, (189), 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) [2024-05-12 10:32:38,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:38,521 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:38,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-05-12 10:32:38,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-05-12 10:32:38,734 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-05-12 10:32:38,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:38,734 INFO L85 PathProgramCache]: Analyzing trace with hash -754811655, now seen corresponding path program 1 times [2024-05-12 10:32:38,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:38,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625139110] [2024-05-12 10:32:38,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:38,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 10:32:38,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:38,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625139110] [2024-05-12 10:32:38,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625139110] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:32:38,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58959511] [2024-05-12 10:32:38,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:38,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:32:38,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:32:38,905 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) [2024-05-12 10:32:38,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-05-12 10:32:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:39,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 8 conjunts are in the unsatisfiable core [2024-05-12 10:32:39,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:32:39,037 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 8 treesize of output 1 [2024-05-12 10:32:39,070 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 8 treesize of output 1 [2024-05-12 10:32:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:39,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:32:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 10:32:39,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58959511] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:32:39,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:32:39,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2024-05-12 10:32:39,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432722212] [2024-05-12 10:32:39,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:32:39,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-05-12 10:32:39,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:39,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-05-12 10:32:39,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-05-12 10:32:39,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-05-12 10:32:39,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 92 transitions, 716 flow. Second operand has 12 states, 12 states have (on average 15.166666666666666) internal successors, (182), 12 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) [2024-05-12 10:32:39,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:39,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-05-12 10:32:39,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:40,421 INFO L124 PetriNetUnfolderBase]: 4828/9071 cut-off events. [2024-05-12 10:32:40,422 INFO L125 PetriNetUnfolderBase]: For 14750/14750 co-relation queries the response was YES. [2024-05-12 10:32:40,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22827 conditions, 9071 events. 4828/9071 cut-off events. For 14750/14750 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 58123 event pairs, 689 based on Foata normal form. 121/9185 useless extension candidates. Maximal degree in co-relation 21129. Up to 1235 conditions per place. [2024-05-12 10:32:40,465 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 224 selfloop transitions, 91 changer transitions 12/332 dead transitions. [2024-05-12 10:32:40,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 332 transitions, 2309 flow [2024-05-12 10:32:40,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-05-12 10:32:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-05-12 10:32:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 432 transitions. [2024-05-12 10:32:40,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5545571245186136 [2024-05-12 10:32:40,467 INFO L175 Difference]: Start difference. First operand has 84 places, 92 transitions, 716 flow. Second operand 19 states and 432 transitions. [2024-05-12 10:32:40,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 332 transitions, 2309 flow [2024-05-12 10:32:40,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 332 transitions, 2289 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-05-12 10:32:40,518 INFO L231 Difference]: Finished difference. Result has 106 places, 135 transitions, 1368 flow [2024-05-12 10:32:40,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1368, PETRI_PLACES=106, PETRI_TRANSITIONS=135} [2024-05-12 10:32:40,520 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 67 predicate places. [2024-05-12 10:32:40,520 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 135 transitions, 1368 flow [2024-05-12 10:32:40,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.166666666666666) internal successors, (182), 12 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) [2024-05-12 10:32:40,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:40,521 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:40,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-05-12 10:32:40,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:32:40,732 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-05-12 10:32:40,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:40,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1847545593, now seen corresponding path program 1 times [2024-05-12 10:32:40,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:40,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035821587] [2024-05-12 10:32:40,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:40,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:41,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:41,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:41,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035821587] [2024-05-12 10:32:41,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035821587] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:32:41,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930626237] [2024-05-12 10:32:41,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:41,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:32:41,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:32:41,181 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) [2024-05-12 10:32:41,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-05-12 10:32:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:41,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 16 conjunts are in the unsatisfiable core [2024-05-12 10:32:41,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:32:41,325 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 23 treesize of output 1 [2024-05-12 10:32:41,388 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 50 treesize of output 19 [2024-05-12 10:32:41,507 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 56 treesize of output 32 [2024-05-12 10:32:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:41,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:32:41,877 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-05-12 10:32:41,877 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 1 case distinctions, treesize of input 18 treesize of output 14 [2024-05-12 10:32:41,902 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2024-05-12 10:32:41,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 65 [2024-05-12 10:32:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:41,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930626237] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:32:41,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:32:41,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-05-12 10:32:41,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798512715] [2024-05-12 10:32:41,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:32:41,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-05-12 10:32:41,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:41,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-05-12 10:32:41,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2024-05-12 10:32:42,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-05-12 10:32:42,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 135 transitions, 1368 flow. Second operand has 17 states, 17 states have (on average 13.588235294117647) internal successors, (231), 17 states have internal predecessors, (231), 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) [2024-05-12 10:32:42,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:42,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-05-12 10:32:42,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:43,786 INFO L124 PetriNetUnfolderBase]: 5972/11196 cut-off events. [2024-05-12 10:32:43,786 INFO L125 PetriNetUnfolderBase]: For 25961/25961 co-relation queries the response was YES. [2024-05-12 10:32:43,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29862 conditions, 11196 events. 5972/11196 cut-off events. For 25961/25961 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 73739 event pairs, 843 based on Foata normal form. 77/11266 useless extension candidates. Maximal degree in co-relation 28044. Up to 1672 conditions per place. [2024-05-12 10:32:43,943 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 223 selfloop transitions, 106 changer transitions 42/376 dead transitions. [2024-05-12 10:32:43,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 376 transitions, 3011 flow [2024-05-12 10:32:43,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-05-12 10:32:43,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-05-12 10:32:43,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 469 transitions. [2024-05-12 10:32:43,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-05-12 10:32:43,946 INFO L175 Difference]: Start difference. First operand has 106 places, 135 transitions, 1368 flow. Second operand 21 states and 469 transitions. [2024-05-12 10:32:43,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 376 transitions, 3011 flow [2024-05-12 10:32:44,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 376 transitions, 2952 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-05-12 10:32:44,050 INFO L231 Difference]: Finished difference. Result has 128 places, 159 transitions, 1876 flow [2024-05-12 10:32:44,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1876, PETRI_PLACES=128, PETRI_TRANSITIONS=159} [2024-05-12 10:32:44,051 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 89 predicate places. [2024-05-12 10:32:44,051 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 159 transitions, 1876 flow [2024-05-12 10:32:44,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 13.588235294117647) internal successors, (231), 17 states have internal predecessors, (231), 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) [2024-05-12 10:32:44,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:44,052 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:44,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-05-12 10:32:44,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:32:44,265 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-05-12 10:32:44,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:44,265 INFO L85 PathProgramCache]: Analyzing trace with hash 24974933, now seen corresponding path program 2 times [2024-05-12 10:32:44,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:44,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974078008] [2024-05-12 10:32:44,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:44,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:44,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:44,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974078008] [2024-05-12 10:32:44,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974078008] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:32:44,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299797059] [2024-05-12 10:32:44,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 10:32:44,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:32:44,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:32:44,459 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) [2024-05-12 10:32:44,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-05-12 10:32:44,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 10:32:44,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:32:44,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 12 conjunts are in the unsatisfiable core [2024-05-12 10:32:44,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:32:44,595 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 8 treesize of output 1 [2024-05-12 10:32:44,613 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 8 treesize of output 1 [2024-05-12 10:32:44,628 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 8 treesize of output 1 [2024-05-12 10:32:44,650 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 8 treesize of output 1 [2024-05-12 10:32:44,675 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:44,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:32:44,751 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:44,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299797059] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:32:44,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:32:44,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2024-05-12 10:32:44,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770131443] [2024-05-12 10:32:44,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:32:44,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-05-12 10:32:44,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:44,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-05-12 10:32:44,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2024-05-12 10:32:44,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-05-12 10:32:44,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 159 transitions, 1876 flow. Second operand has 19 states, 19 states have (on average 13.0) internal successors, (247), 19 states have internal predecessors, (247), 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) [2024-05-12 10:32:44,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:44,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-05-12 10:32:44,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:49,168 INFO L124 PetriNetUnfolderBase]: 17722/33089 cut-off events. [2024-05-12 10:32:49,168 INFO L125 PetriNetUnfolderBase]: For 102603/102603 co-relation queries the response was YES. [2024-05-12 10:32:49,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93267 conditions, 33089 events. 17722/33089 cut-off events. For 102603/102603 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 251598 event pairs, 3728 based on Foata normal form. 544/33626 useless extension candidates. Maximal degree in co-relation 90259. Up to 5750 conditions per place. [2024-05-12 10:32:49,428 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 558 selfloop transitions, 360 changer transitions 0/923 dead transitions. [2024-05-12 10:32:49,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 923 transitions, 8638 flow [2024-05-12 10:32:49,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-05-12 10:32:49,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-05-12 10:32:49,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 980 transitions. [2024-05-12 10:32:49,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5558706749858197 [2024-05-12 10:32:49,431 INFO L175 Difference]: Start difference. First operand has 128 places, 159 transitions, 1876 flow. Second operand 43 states and 980 transitions. [2024-05-12 10:32:49,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 923 transitions, 8638 flow [2024-05-12 10:32:50,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 923 transitions, 8358 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-05-12 10:32:50,367 INFO L231 Difference]: Finished difference. Result has 181 places, 436 transitions, 5887 flow [2024-05-12 10:32:50,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1777, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=5887, PETRI_PLACES=181, PETRI_TRANSITIONS=436} [2024-05-12 10:32:50,368 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 142 predicate places. [2024-05-12 10:32:50,368 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 436 transitions, 5887 flow [2024-05-12 10:32:50,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.0) internal successors, (247), 19 states have internal predecessors, (247), 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) [2024-05-12 10:32:50,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:50,368 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:50,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-05-12 10:32:50,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-05-12 10:32:50,570 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-05-12 10:32:50,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:50,570 INFO L85 PathProgramCache]: Analyzing trace with hash -2084179485, now seen corresponding path program 2 times [2024-05-12 10:32:50,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:50,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436507719] [2024-05-12 10:32:50,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:50,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:52,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:52,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436507719] [2024-05-12 10:32:52,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436507719] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:32:52,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932697718] [2024-05-12 10:32:52,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 10:32:52,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:32:52,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:32:52,732 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) [2024-05-12 10:32:52,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-05-12 10:32:52,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 10:32:52,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:32:52,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 30 conjunts are in the unsatisfiable core [2024-05-12 10:32:52,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:32:52,924 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 15 treesize of output 1 [2024-05-12 10:32:53,047 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 14 [2024-05-12 10:32:53,119 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 14 [2024-05-12 10:32:53,296 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 56 treesize of output 32 [2024-05-12 10:32:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:53,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:32:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:53,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932697718] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:32:53,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:32:53,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2024-05-12 10:32:53,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44527768] [2024-05-12 10:32:53,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:32:53,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-05-12 10:32:53,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:53,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-05-12 10:32:53,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2024-05-12 10:32:54,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-05-12 10:32:54,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 436 transitions, 5887 flow. Second operand has 28 states, 28 states have (on average 12.857142857142858) internal successors, (360), 28 states have internal predecessors, (360), 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) [2024-05-12 10:32:54,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:54,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-05-12 10:32:54,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:33:10,425 INFO L124 PetriNetUnfolderBase]: 38019/70403 cut-off events. [2024-05-12 10:33:10,425 INFO L125 PetriNetUnfolderBase]: For 306773/306773 co-relation queries the response was YES. [2024-05-12 10:33:11,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213027 conditions, 70403 events. 38019/70403 cut-off events. For 306773/306773 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 552329 event pairs, 4880 based on Foata normal form. 605/71001 useless extension candidates. Maximal degree in co-relation 209726. Up to 9944 conditions per place. [2024-05-12 10:33:11,287 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 614 selfloop transitions, 731 changer transitions 75/1425 dead transitions. [2024-05-12 10:33:11,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 1425 transitions, 17246 flow [2024-05-12 10:33:11,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-05-12 10:33:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-05-12 10:33:11,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 1035 transitions. [2024-05-12 10:33:11,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4949784791965567 [2024-05-12 10:33:11,294 INFO L175 Difference]: Start difference. First operand has 181 places, 436 transitions, 5887 flow. Second operand 51 states and 1035 transitions. [2024-05-12 10:33:11,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 1425 transitions, 17246 flow [2024-05-12 10:33:15,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 1425 transitions, 16459 flow, removed 358 selfloop flow, removed 1 redundant places. [2024-05-12 10:33:15,963 INFO L231 Difference]: Finished difference. Result has 253 places, 887 transitions, 13862 flow [2024-05-12 10:33:15,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5588, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=13862, PETRI_PLACES=253, PETRI_TRANSITIONS=887} [2024-05-12 10:33:15,964 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 214 predicate places. [2024-05-12 10:33:15,964 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 887 transitions, 13862 flow [2024-05-12 10:33:15,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 12.857142857142858) internal successors, (360), 28 states have internal predecessors, (360), 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) [2024-05-12 10:33:15,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:33:15,964 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:33:15,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-05-12 10:33:16,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:33:16,165 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-05-12 10:33:16,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:33:16,165 INFO L85 PathProgramCache]: Analyzing trace with hash -437958217, now seen corresponding path program 1 times [2024-05-12 10:33:16,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:33:16,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428311411] [2024-05-12 10:33:16,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:33:16,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:33:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:33:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 9 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 10:33:16,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:33:16,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428311411] [2024-05-12 10:33:16,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428311411] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:33:16,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604366803] [2024-05-12 10:33:16,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:33:16,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:33:16,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:33:16,548 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) [2024-05-12 10:33:16,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-05-12 10:33:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:33:16,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 15 conjunts are in the unsatisfiable core [2024-05-12 10:33:16,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:33:16,759 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 8 treesize of output 1 [2024-05-12 10:33:16,794 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 8 treesize of output 1 [2024-05-12 10:33:16,826 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 8 treesize of output 1 [2024-05-12 10:33:16,861 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 8 treesize of output 1 [2024-05-12 10:33:16,898 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 8 treesize of output 1 [2024-05-12 10:33:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:33:17,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:33:17,133 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 45 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-05-12 10:33:17,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604366803] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:33:17,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:33:17,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 22 [2024-05-12 10:33:17,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395551828] [2024-05-12 10:33:17,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:33:17,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-05-12 10:33:17,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:33:17,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-05-12 10:33:17,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2024-05-12 10:33:17,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-05-12 10:33:17,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 887 transitions, 13862 flow. Second operand has 22 states, 22 states have (on average 14.727272727272727) internal successors, (324), 22 states have internal predecessors, (324), 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) [2024-05-12 10:33:17,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:33:17,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-05-12 10:33:17,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand