./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack_longest-1.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/stack_longest-1.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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_longest-1.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/stack_longest-1.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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 16:29:47,258 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 16:29:47,353 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 16:29:47,359 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 16:29:47,359 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 16:29:47,381 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 16:29:47,384 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 16:29:47,384 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 16:29:47,385 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 16:29:47,385 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 16:29:47,385 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 16:29:47,385 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 16:29:47,386 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 16:29:47,389 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 16:29:47,389 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 16:29:47,390 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 16:29:47,390 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 16:29:47,391 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 16:29:47,391 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 16:29:47,391 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 16:29:47,392 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 16:29:47,392 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 16:29:47,392 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 16:29:47,393 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 16:29:47,393 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 16:29:47,393 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 16:29:47,393 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 16:29:47,393 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 16:29:47,394 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 16:29:47,394 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 16:29:47,395 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 16:29:47,395 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 16:29:47,395 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:29:47,395 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 16:29:47,395 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 16:29:47,396 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 16:29:47,396 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 16:29:47,396 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 16:29:47,396 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 16:29:47,396 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 16:29:47,396 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 16:29:47,397 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 16:29:47,397 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 16:29:47,397 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 16:29:47,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 16:29:47,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 16:29:47,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 16:29:47,615 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 16:29:47,616 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 16:29:47,617 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/stack_longest-1.yml/witness.yml [2024-06-04 16:29:47,729 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 16:29:47,730 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 16:29:47,731 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-1.i [2024-06-04 16:29:48,717 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 16:29:48,947 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 16:29:48,948 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i [2024-06-04 16:29:48,962 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/122b29008/83263ec32fe4453d80023d7ae5956e62/FLAGe97c07922 [2024-06-04 16:29:48,972 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/122b29008/83263ec32fe4453d80023d7ae5956e62 [2024-06-04 16:29:48,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 16:29:48,973 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 16:29:48,974 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 16:29:48,974 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 16:29:48,978 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 16:29:48,978 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:29:47" (1/2) ... [2024-06-04 16:29:48,979 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62155dbc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:29:48, skipping insertion in model container [2024-06-04 16:29:48,979 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:29:47" (1/2) ... [2024-06-04 16:29:48,980 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@d4f2bca and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:29:48, skipping insertion in model container [2024-06-04 16:29:48,980 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:29:48" (2/2) ... [2024-06-04 16:29:48,981 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62155dbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:29:48, skipping insertion in model container [2024-06-04 16:29:48,981 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:29:48" (2/2) ... [2024-06-04 16:29:48,981 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 16:29:49,000 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 16:29:49,001 INFO L97 edCorrectnessWitness]: Location invariant before [L1024-L1024] ! multithreaded || (m_locked || (long long )flag + (long long )top >= 0LL) [2024-06-04 16:29:49,001 INFO L97 edCorrectnessWitness]: Location invariant before [L1023-L1023] ! multithreaded || (m_locked || (long long )flag + (long long )top >= 0LL) [2024-06-04 16:29:49,001 INFO L103 edCorrectnessWitness]: ghost_variable m_locked = 0 [2024-06-04 16:29:49,001 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 16:29:49,001 INFO L106 edCorrectnessWitness]: ghost_update [L999-L999] m_locked = 0; [2024-06-04 16:29:49,001 INFO L106 edCorrectnessWitness]: ghost_update [L1014-L1014] m_locked = 0; [2024-06-04 16:29:49,002 INFO L106 edCorrectnessWitness]: ghost_update [L993-L993] m_locked = 1; [2024-06-04 16:29:49,002 INFO L106 edCorrectnessWitness]: ghost_update [L1022-L1022] multithreaded = 1; [2024-06-04 16:29:49,002 INFO L106 edCorrectnessWitness]: ghost_update [L1008-L1008] m_locked = 1; [2024-06-04 16:29:49,025 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 16:29:49,453 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:29:49,464 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 16:29:49,551 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:29:49,598 INFO L206 MainTranslator]: Completed translation [2024-06-04 16:29:49,599 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:29:49 WrapperNode [2024-06-04 16:29:49,599 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 16:29:49,600 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 16:29:49,600 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 16:29:49,600 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 16:29:49,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:29:49" (1/1) ... [2024-06-04 16:29:49,633 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:29:49" (1/1) ... [2024-06-04 16:29:49,662 INFO L138 Inliner]: procedures = 277, calls = 32, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 167 [2024-06-04 16:29:49,663 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 16:29:49,663 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 16:29:49,663 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 16:29:49,664 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 16:29:49,672 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:29:49" (1/1) ... [2024-06-04 16:29:49,672 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:29:49" (1/1) ... [2024-06-04 16:29:49,697 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:29:49" (1/1) ... [2024-06-04 16:29:49,718 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 5, 3]. 50 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 2 writes are split as follows [0, 0, 2]. [2024-06-04 16:29:49,718 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:29:49" (1/1) ... [2024-06-04 16:29:49,718 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:29:49" (1/1) ... [2024-06-04 16:29:49,734 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:29:49" (1/1) ... [2024-06-04 16:29:49,737 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:29:49" (1/1) ... [2024-06-04 16:29:49,740 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:29:49" (1/1) ... [2024-06-04 16:29:49,744 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:29:49" (1/1) ... [2024-06-04 16:29:49,746 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 16:29:49,748 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 16:29:49,748 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 16:29:49,748 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 16:29:49,750 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:29:49" (1/1) ... [2024-06-04 16:29:49,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:29:49,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:29:49,773 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-04 16:29:49,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-04 16:29:49,831 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-04 16:29:49,831 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-04 16:29:49,832 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-04 16:29:49,832 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-04 16:29:49,832 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-06-04 16:29:49,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-04 16:29:49,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-04 16:29:49,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-06-04 16:29:49,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-04 16:29:49,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-04 16:29:49,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-06-04 16:29:49,834 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-06-04 16:29:49,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 16:29:49,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 16:29:49,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-04 16:29:49,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-04 16:29:49,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 16:29:49,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 16:29:49,836 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 16:29:49,978 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 16:29:49,980 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 16:29:50,216 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 16:29:50,216 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 16:29:50,337 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 16:29:50,337 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-04 16:29:50,338 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:29:50 BoogieIcfgContainer [2024-06-04 16:29:50,338 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 16:29:50,339 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 16:29:50,340 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 16:29:50,342 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 16:29:50,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:29:47" (1/4) ... [2024-06-04 16:29:50,342 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f58a171 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:29:50, skipping insertion in model container [2024-06-04 16:29:50,343 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 04:29:48" (2/4) ... [2024-06-04 16:29:50,343 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f58a171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:29:50, skipping insertion in model container [2024-06-04 16:29:50,343 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:29:49" (3/4) ... [2024-06-04 16:29:50,343 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f58a171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:29:50, skipping insertion in model container [2024-06-04 16:29:50,343 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:29:50" (4/4) ... [2024-06-04 16:29:50,344 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2024-06-04 16:29:50,356 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 16:29:50,357 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-04 16:29:50,357 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 16:29:50,420 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-04 16:29:50,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 30 transitions, 74 flow [2024-06-04 16:29:50,457 INFO L124 PetriNetUnfolderBase]: 2/28 cut-off events. [2024-06-04 16:29:50,457 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-04 16:29:50,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 28 events. 2/28 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 43 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-06-04 16:29:50,459 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 30 transitions, 74 flow [2024-06-04 16:29:50,461 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 26 transitions, 61 flow [2024-06-04 16:29:50,467 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 16:29:50,472 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;@560cd4de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 16:29:50,472 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-04 16:29:50,474 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 16:29:50,474 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 16:29:50,475 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:29:50,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:29:50,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 16:29:50,475 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:29:50,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:29:50,479 INFO L85 PathProgramCache]: Analyzing trace with hash 452040919, now seen corresponding path program 1 times [2024-06-04 16:29:50,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:29:50,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001612719] [2024-06-04 16:29:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:29:50,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:29:50,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:29:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:29:50,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:29:50,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001612719] [2024-06-04 16:29:50,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001612719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:29:50,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:29:50,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 16:29:50,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149460339] [2024-06-04 16:29:50,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:29:50,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 16:29:50,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:29:50,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 16:29:50,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 16:29:50,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-04 16:29:50,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:29:50,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:29:50,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-04 16:29:50,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:29:50,792 INFO L124 PetriNetUnfolderBase]: 267/483 cut-off events. [2024-06-04 16:29:50,792 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-06-04 16:29:50,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 483 events. 267/483 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1949 event pairs, 95 based on Foata normal form. 24/500 useless extension candidates. Maximal degree in co-relation 896. Up to 308 conditions per place. [2024-06-04 16:29:50,798 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 32 selfloop transitions, 2 changer transitions 3/40 dead transitions. [2024-06-04 16:29:50,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 169 flow [2024-06-04 16:29:50,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 16:29:50,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 16:29:50,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-06-04 16:29:50,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 16:29:50,809 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 61 flow. Second operand 3 states and 54 transitions. [2024-06-04 16:29:50,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 40 transitions, 169 flow [2024-06-04 16:29:50,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 40 transitions, 161 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:29:50,813 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 67 flow [2024-06-04 16:29:50,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2024-06-04 16:29:50,817 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2024-06-04 16:29:50,817 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 67 flow [2024-06-04 16:29:50,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:29:50,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:29:50,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:29:50,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 16:29:50,818 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:29:50,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:29:50,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1522866891, now seen corresponding path program 1 times [2024-06-04 16:29:50,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:29:50,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522289812] [2024-06-04 16:29:50,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:29:50,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:29:50,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:29:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:29:50,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:29:50,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522289812] [2024-06-04 16:29:50,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522289812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:29:50,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:29:50,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:29:50,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883431629] [2024-06-04 16:29:50,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:29:50,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:29:50,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:29:50,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:29:50,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:29:50,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-04 16:29:50,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 67 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:29:50,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:29:50,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-04 16:29:50,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:29:51,130 INFO L124 PetriNetUnfolderBase]: 304/554 cut-off events. [2024-06-04 16:29:51,131 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-06-04 16:29:51,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 554 events. 304/554 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2227 event pairs, 123 based on Foata normal form. 20/573 useless extension candidates. Maximal degree in co-relation 555. Up to 301 conditions per place. [2024-06-04 16:29:51,137 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 34 selfloop transitions, 6 changer transitions 0/43 dead transitions. [2024-06-04 16:29:51,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 43 transitions, 188 flow [2024-06-04 16:29:51,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:29:51,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:29:51,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-06-04 16:29:51,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-04 16:29:51,143 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 67 flow. Second operand 5 states and 65 transitions. [2024-06-04 16:29:51,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 43 transitions, 188 flow [2024-06-04 16:29:51,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 43 transitions, 185 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 16:29:51,149 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 106 flow [2024-06-04 16:29:51,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2024-06-04 16:29:51,152 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2024-06-04 16:29:51,153 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 106 flow [2024-06-04 16:29:51,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:29:51,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:29:51,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:29:51,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 16:29:51,154 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:29:51,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:29:51,154 INFO L85 PathProgramCache]: Analyzing trace with hash 35767333, now seen corresponding path program 1 times [2024-06-04 16:29:51,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:29:51,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759157582] [2024-06-04 16:29:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:29:51,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:29:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:29:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:29:51,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:29:51,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759157582] [2024-06-04 16:29:51,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759157582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:29:51,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:29:51,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:29:51,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715604237] [2024-06-04 16:29:51,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:29:51,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:29:51,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:29:51,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:29:51,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:29:51,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-04 16:29:51,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 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) [2024-06-04 16:29:51,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:29:51,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-04 16:29:51,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:29:51,372 INFO L124 PetriNetUnfolderBase]: 395/713 cut-off events. [2024-06-04 16:29:51,372 INFO L125 PetriNetUnfolderBase]: For 420/420 co-relation queries the response was YES. [2024-06-04 16:29:51,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1833 conditions, 713 events. 395/713 cut-off events. For 420/420 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2894 event pairs, 93 based on Foata normal form. 27/739 useless extension candidates. Maximal degree in co-relation 1353. Up to 297 conditions per place. [2024-06-04 16:29:51,375 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 49 selfloop transitions, 3 changer transitions 3/58 dead transitions. [2024-06-04 16:29:51,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 58 transitions, 312 flow [2024-06-04 16:29:51,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:29:51,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:29:51,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-06-04 16:29:51,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-04 16:29:51,377 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 106 flow. Second operand 4 states and 67 transitions. [2024-06-04 16:29:51,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 58 transitions, 312 flow [2024-06-04 16:29:51,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 58 transitions, 309 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-04 16:29:51,379 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 111 flow [2024-06-04 16:29:51,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=111, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2024-06-04 16:29:51,380 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2024-06-04 16:29:51,380 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 111 flow [2024-06-04 16:29:51,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 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) [2024-06-04 16:29:51,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:29:51,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:29:51,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 16:29:51,381 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:29:51,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:29:51,381 INFO L85 PathProgramCache]: Analyzing trace with hash -2081019280, now seen corresponding path program 1 times [2024-06-04 16:29:51,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:29:51,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082104345] [2024-06-04 16:29:51,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:29:51,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:29:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:29:51,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:29:51,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:29:51,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082104345] [2024-06-04 16:29:51,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082104345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:29:51,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:29:51,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:29:51,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802761991] [2024-06-04 16:29:51,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:29:51,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:29:51,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:29:51,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:29:51,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:29:51,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-04 16:29:51,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 111 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:29:51,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:29:51,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-04 16:29:51,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:29:51,582 INFO L124 PetriNetUnfolderBase]: 232/448 cut-off events. [2024-06-04 16:29:51,582 INFO L125 PetriNetUnfolderBase]: For 267/267 co-relation queries the response was YES. [2024-06-04 16:29:51,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1162 conditions, 448 events. 232/448 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1653 event pairs, 95 based on Foata normal form. 24/471 useless extension candidates. Maximal degree in co-relation 606. Up to 214 conditions per place. [2024-06-04 16:29:51,584 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 27 selfloop transitions, 6 changer transitions 0/36 dead transitions. [2024-06-04 16:29:51,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 183 flow [2024-06-04 16:29:51,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:29:51,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:29:51,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2024-06-04 16:29:51,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38666666666666666 [2024-06-04 16:29:51,586 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 111 flow. Second operand 5 states and 58 transitions. [2024-06-04 16:29:51,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 183 flow [2024-06-04 16:29:51,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 36 transitions, 170 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 16:29:51,588 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 94 flow [2024-06-04 16:29:51,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2024-06-04 16:29:51,589 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2024-06-04 16:29:51,589 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 94 flow [2024-06-04 16:29:51,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:29:51,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:29:51,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:29:51,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 16:29:51,590 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:29:51,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:29:51,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1039499677, now seen corresponding path program 1 times [2024-06-04 16:29:51,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:29:51,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584296996] [2024-06-04 16:29:51,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:29:51,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:29:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:29:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:29:51,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:29:51,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584296996] [2024-06-04 16:29:51,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584296996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:29:51,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:29:51,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:29:51,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332502081] [2024-06-04 16:29:51,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:29:51,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:29:51,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:29:51,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:29:51,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:29:51,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-04 16:29:51,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:29:51,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:29:51,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-04 16:29:51,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:29:51,861 INFO L124 PetriNetUnfolderBase]: 280/536 cut-off events. [2024-06-04 16:29:51,861 INFO L125 PetriNetUnfolderBase]: For 435/435 co-relation queries the response was YES. [2024-06-04 16:29:51,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1353 conditions, 536 events. 280/536 cut-off events. For 435/435 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1908 event pairs, 76 based on Foata normal form. 9/544 useless extension candidates. Maximal degree in co-relation 884. Up to 157 conditions per place. [2024-06-04 16:29:51,863 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 46 selfloop transitions, 5 changer transitions 3/57 dead transitions. [2024-06-04 16:29:51,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 57 transitions, 310 flow [2024-06-04 16:29:51,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:29:51,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:29:51,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-06-04 16:29:51,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-04 16:29:51,865 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 94 flow. Second operand 5 states and 80 transitions. [2024-06-04 16:29:51,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 57 transitions, 310 flow [2024-06-04 16:29:51,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 280 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 16:29:51,867 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 109 flow [2024-06-04 16:29:51,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=109, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2024-06-04 16:29:51,868 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-06-04 16:29:51,868 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 109 flow [2024-06-04 16:29:51,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:29:51,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:29:51,868 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:29:51,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 16:29:51,869 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:29:51,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:29:51,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1044211821, now seen corresponding path program 1 times [2024-06-04 16:29:51,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:29:51,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545690150] [2024-06-04 16:29:51,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:29:51,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:29:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:29:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-04 16:29:52,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:29:52,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545690150] [2024-06-04 16:29:52,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545690150] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-04 16:29:52,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315096147] [2024-06-04 16:29:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:29:52,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 16:29:52,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:29:52,076 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-04 16:29:52,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-04 16:29:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:29:52,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 7 conjunts are in the unsatisfiable core [2024-06-04 16:29:52,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-04 16:29:52,264 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 [2024-06-04 16:29:52,577 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 69 treesize of output 54 [2024-06-04 16:29:52,588 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-04 16:29:52,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 42 [2024-06-04 16:29:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:29:52,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-04 16:29:52,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 5 [2024-06-04 16:29:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-04 16:29:52,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315096147] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-04 16:29:52,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-04 16:29:52,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 4] total 8 [2024-06-04 16:29:52,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128756961] [2024-06-04 16:29:52,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:29:52,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:29:52,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:29:52,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:29:52,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:29:52,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-04 16:29:52,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 109 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:29:52,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:29:52,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-04 16:29:52,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:29:53,098 INFO L124 PetriNetUnfolderBase]: 254/495 cut-off events. [2024-06-04 16:29:53,098 INFO L125 PetriNetUnfolderBase]: For 369/369 co-relation queries the response was YES. [2024-06-04 16:29:53,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1185 conditions, 495 events. 254/495 cut-off events. For 369/369 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1864 event pairs, 207 based on Foata normal form. 9/503 useless extension candidates. Maximal degree in co-relation 733. Up to 452 conditions per place. [2024-06-04 16:29:53,100 INFO L140 encePairwiseOnDemand]: 28/30 looper letters, 0 selfloop transitions, 0 changer transitions 27/27 dead transitions. [2024-06-04 16:29:53,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 27 transitions, 147 flow [2024-06-04 16:29:53,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 16:29:53,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 16:29:53,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 36 transitions. [2024-06-04 16:29:53,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-04 16:29:53,101 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 109 flow. Second operand 3 states and 36 transitions. [2024-06-04 16:29:53,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 27 transitions, 147 flow [2024-06-04 16:29:53,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 27 transitions, 132 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-04 16:29:53,103 INFO L231 Difference]: Finished difference. Result has 34 places, 0 transitions, 0 flow [2024-06-04 16:29:53,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=34, PETRI_TRANSITIONS=0} [2024-06-04 16:29:53,105 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2024-06-04 16:29:53,105 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 0 transitions, 0 flow [2024-06-04 16:29:53,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:29:53,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-04 16:29:53,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-04 16:29:53,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-04 16:29:53,108 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-04 16:29:53,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-06-04 16:29:53,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-06-04 16:29:53,319 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-06-04 16:29:53,322 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-04 16:29:53,322 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-04 16:29:53,329 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-04 16:29:53,329 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-04 16:29:53,330 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.06 04:29:53 BasicIcfg [2024-06-04 16:29:53,330 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-04 16:29:53,332 INFO L158 Benchmark]: Toolchain (without parser) took 4357.28ms. Allocated memory was 203.4MB in the beginning and 314.6MB in the end (delta: 111.1MB). Free memory was 130.2MB in the beginning and 252.0MB in the end (delta: -121.8MB). Peak memory consumption was 146.1MB. Max. memory is 16.1GB. [2024-06-04 16:29:53,333 INFO L158 Benchmark]: Witness Parser took 0.14ms. Allocated memory is still 107.0MB. Free memory is still 71.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-04 16:29:53,333 INFO L158 Benchmark]: CDTParser took 1.52ms. Allocated memory is still 203.4MB. Free memory is still 177.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-04 16:29:53,333 INFO L158 Benchmark]: CACSL2BoogieTranslator took 624.91ms. Allocated memory is still 203.4MB. Free memory was 130.0MB in the beginning and 152.4MB in the end (delta: -22.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-06-04 16:29:53,334 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.11ms. Allocated memory is still 203.4MB. Free memory was 152.4MB in the beginning and 149.5MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-04 16:29:53,334 INFO L158 Benchmark]: Boogie Preprocessor took 83.98ms. Allocated memory is still 203.4MB. Free memory was 149.5MB in the beginning and 146.7MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-04 16:29:53,334 INFO L158 Benchmark]: RCFGBuilder took 590.17ms. Allocated memory is still 203.4MB. Free memory was 146.7MB in the beginning and 97.9MB in the end (delta: 48.8MB). Peak memory consumption was 48.2MB. Max. memory is 16.1GB. [2024-06-04 16:29:53,336 INFO L158 Benchmark]: TraceAbstraction took 2990.67ms. Allocated memory was 203.4MB in the beginning and 314.6MB in the end (delta: 111.1MB). Free memory was 97.1MB in the beginning and 252.0MB in the end (delta: -154.9MB). Peak memory consumption was 112.3MB. Max. memory is 16.1GB. [2024-06-04 16:29:53,337 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.14ms. Allocated memory is still 107.0MB. Free memory is still 71.6MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 1.52ms. Allocated memory is still 203.4MB. Free memory is still 177.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 624.91ms. Allocated memory is still 203.4MB. Free memory was 130.0MB in the beginning and 152.4MB in the end (delta: -22.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 63.11ms. Allocated memory is still 203.4MB. Free memory was 152.4MB in the beginning and 149.5MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 83.98ms. Allocated memory is still 203.4MB. Free memory was 149.5MB in the beginning and 146.7MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 590.17ms. Allocated memory is still 203.4MB. Free memory was 146.7MB in the beginning and 97.9MB in the end (delta: 48.8MB). Peak memory consumption was 48.2MB. Max. memory is 16.1GB. * TraceAbstraction took 2990.67ms. Allocated memory was 203.4MB in the beginning and 314.6MB in the end (delta: 111.1MB). Free memory was 97.1MB in the beginning and 252.0MB in the end (delta: -154.9MB). Peak memory consumption was 112.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 1023]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1024]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.9s, OverallIterations: 6, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 170 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 150 mSDsluCounter, 4 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 384 IncrementalHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 4 mSDtfsCounter, 384 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=3, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 112 NumberOfCodeBlocks, 112 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 128 ConstructedInterpolants, 9 QuantifiedInterpolants, 1257 SizeOfPredicates, 26 NumberOfNonLiveVariables, 196 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 8 InterpolantComputations, 6 PerfectInterpolantSequences, 8/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-04 16:29:53,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE