./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack-1.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/stack-1.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/stack-1.i ./goblint.2024-06-19_11-23-25.files/protection/stack-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 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:47:07,960 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:47:08,026 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:47:08,033 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:47:08,033 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:47:08,058 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:47:08,060 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:47:08,060 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:47:08,060 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:47:08,064 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:47:08,064 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:47:08,064 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:47:08,065 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:47:08,066 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:47:08,066 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:47:08,067 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:47:08,067 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:47:08,067 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:47:08,067 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:47:08,067 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:47:08,068 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:47:08,068 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:47:08,068 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:47:08,068 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:47:08,069 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:47:08,069 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:47:08,069 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:47:08,069 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:47:08,070 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:47:08,070 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:47:08,071 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:47:08,071 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:47:08,071 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:47:08,071 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:47:08,072 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:47:08,072 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:47:08,072 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:47:08,072 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:47:08,072 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:47:08,073 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:47:08,073 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:47:08,073 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:47:08,073 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:47:08,073 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:47:08,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:47:08,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:47:08,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:47:08,291 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:47:08,291 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:47:08,292 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-1.i [2024-06-27 17:47:09,368 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:47:09,647 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:47:09,648 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i [2024-06-27 17:47:09,670 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37310f45a/5cb5c672da8542ad8fcad7bccd58555c/FLAGe1f0b9549 [2024-06-27 17:47:09,682 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37310f45a/5cb5c672da8542ad8fcad7bccd58555c [2024-06-27 17:47:09,684 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:47:09,687 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:47:09,689 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/stack-1.yml/witness.yml [2024-06-27 17:47:09,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:47:09,767 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:47:09,768 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:47:09,768 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:47:09,772 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:47:09,773 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:47:09" (1/2) ... [2024-06-27 17:47:09,774 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e3bef5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:47:09, skipping insertion in model container [2024-06-27 17:47:09,774 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:47:09" (1/2) ... [2024-06-27 17:47:09,775 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7a14eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:47:09, skipping insertion in model container [2024-06-27 17:47:09,776 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:47:09" (2/2) ... [2024-06-27 17:47:09,776 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e3bef5d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:09, skipping insertion in model container [2024-06-27 17:47:09,776 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:47:09" (2/2) ... [2024-06-27 17:47:09,776 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:47:09,807 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:47:09,808 INFO L97 edCorrectnessWitness]: Location invariant before [L1023-L1023] ! multithreaded || flag == (_Bool)0 [2024-06-27 17:47:09,808 INFO L97 edCorrectnessWitness]: Location invariant before [L1024-L1024] ! multithreaded || flag == (_Bool)0 [2024-06-27 17:47:09,809 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:47:09,809 INFO L103 edCorrectnessWitness]: ghost_variable m_locked = 0 [2024-06-27 17:47:09,809 INFO L106 edCorrectnessWitness]: ghost_update [L1014-L1014] m_locked = 0; [2024-06-27 17:47:09,810 INFO L106 edCorrectnessWitness]: ghost_update [L1008-L1008] m_locked = 1; [2024-06-27 17:47:09,810 INFO L106 edCorrectnessWitness]: ghost_update [L1022-L1022] multithreaded = 1; [2024-06-27 17:47:09,810 INFO L106 edCorrectnessWitness]: ghost_update [L994-L994] m_locked = 1; [2024-06-27 17:47:09,810 INFO L106 edCorrectnessWitness]: ghost_update [L999-L999] m_locked = 0; [2024-06-27 17:47:09,850 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:47:10,180 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i[41520,41533] [2024-06-27 17:47:10,214 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:47:10,223 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local [2024-06-27 17:47:10,290 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i[41520,41533] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:47:10,309 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:47:10,365 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:47:10,365 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:10 WrapperNode [2024-06-27 17:47:10,366 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:47:10,367 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:47:10,367 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:47:10,367 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:47:10,373 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,388 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,406 INFO L138 Inliner]: procedures = 277, calls = 35, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 160 [2024-06-27 17:47:10,409 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:47:10,409 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:47:10,410 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:47:10,410 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:47:10,418 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,419 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,421 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,433 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 5, 7]. 50 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5]. The 1 writes are split as follows [0, 0, 1]. [2024-06-27 17:47:10,433 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,433 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,438 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,440 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,442 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,443 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,445 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:47:10,445 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:47:10,445 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:47:10,446 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:47:10,446 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:47:10,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:47:10,481 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 17:47:10,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 17:47:10,511 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-27 17:47:10,511 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-27 17:47:10,511 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-27 17:47:10,511 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-27 17:47:10,511 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-06-27 17:47:10,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 17:47:10,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 17:47:10,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-06-27 17:47:10,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 17:47:10,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 17:47:10,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-06-27 17:47:10,512 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-06-27 17:47:10,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:47:10,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:47:10,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 17:47:10,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-27 17:47:10,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:47:10,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:47:10,514 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:47:10,613 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:47:10,615 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:47:10,819 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:47:10,819 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:47:11,079 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:47:11,079 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-27 17:47:11,080 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:47:11 BoogieIcfgContainer [2024-06-27 17:47:11,080 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:47:11,081 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:47:11,081 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:47:11,084 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:47:11,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:47:09" (1/4) ... [2024-06-27 17:47:11,084 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ecabb18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:47:11, skipping insertion in model container [2024-06-27 17:47:11,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:47:09" (2/4) ... [2024-06-27 17:47:11,085 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ecabb18 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:47:11, skipping insertion in model container [2024-06-27 17:47:11,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:10" (3/4) ... [2024-06-27 17:47:11,085 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ecabb18 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:47:11, skipping insertion in model container [2024-06-27 17:47:11,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:47:11" (4/4) ... [2024-06-27 17:47:11,086 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-1.i [2024-06-27 17:47:11,100 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:47:11,100 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 17:47:11,100 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:47:11,152 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 17:47:11,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 39 transitions, 92 flow [2024-06-27 17:47:11,202 INFO L124 PetriNetUnfolderBase]: 5/37 cut-off events. [2024-06-27 17:47:11,203 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:47:11,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 37 events. 5/37 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 70 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2024-06-27 17:47:11,207 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 39 transitions, 92 flow [2024-06-27 17:47:11,211 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 35 transitions, 79 flow [2024-06-27 17:47:11,220 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:47:11,225 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;@23ff9c80, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:47:11,231 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 17:47:11,234 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:47:11,235 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 17:47:11,235 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:47:11,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:11,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:47:11,237 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 17:47:11,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:11,242 INFO L85 PathProgramCache]: Analyzing trace with hash 402773439, now seen corresponding path program 1 times [2024-06-27 17:47:11,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:11,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288356136] [2024-06-27 17:47:11,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:11,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:11,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:11,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:11,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288356136] [2024-06-27 17:47:11,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288356136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:11,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:11,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:47:11,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286651052] [2024-06-27 17:47:11,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:11,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:47:11,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:11,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:47:11,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:47:11,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-06-27 17:47:11,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:11,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:11,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-06-27 17:47:11,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:11,695 INFO L124 PetriNetUnfolderBase]: 231/459 cut-off events. [2024-06-27 17:47:11,695 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 17:47:11,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 876 conditions, 459 events. 231/459 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2129 event pairs, 178 based on Foata normal form. 100/498 useless extension candidates. Maximal degree in co-relation 822. Up to 387 conditions per place. [2024-06-27 17:47:11,702 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 22 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2024-06-27 17:47:11,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 117 flow [2024-06-27 17:47:11,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:47:11,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:47:11,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 57 transitions. [2024-06-27 17:47:11,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-27 17:47:11,713 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 79 flow. Second operand 3 states and 57 transitions. [2024-06-27 17:47:11,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 117 flow [2024-06-27 17:47:11,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 31 transitions, 112 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:47:11,720 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 68 flow [2024-06-27 17:47:11,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2024-06-27 17:47:11,724 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2024-06-27 17:47:11,724 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 68 flow [2024-06-27 17:47:11,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:11,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:11,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:11,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:47:11,725 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 17:47:11,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:11,726 INFO L85 PathProgramCache]: Analyzing trace with hash 783660967, now seen corresponding path program 1 times [2024-06-27 17:47:11,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:11,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186155059] [2024-06-27 17:47:11,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:11,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:11,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:11,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186155059] [2024-06-27 17:47:11,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186155059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:11,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:11,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:47:11,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260415589] [2024-06-27 17:47:11,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:11,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:47:11,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:11,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:47:11,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:47:11,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-27 17:47:11,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:11,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:11,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-27 17:47:11,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:12,036 INFO L124 PetriNetUnfolderBase]: 319/607 cut-off events. [2024-06-27 17:47:12,037 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-27 17:47:12,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 607 events. 319/607 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2806 event pairs, 56 based on Foata normal form. 5/565 useless extension candidates. Maximal degree in co-relation 1167. Up to 373 conditions per place. [2024-06-27 17:47:12,041 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 44 selfloop transitions, 3 changer transitions 2/57 dead transitions. [2024-06-27 17:47:12,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 57 transitions, 223 flow [2024-06-27 17:47:12,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:47:12,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:47:12,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-27 17:47:12,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-27 17:47:12,047 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 68 flow. Second operand 4 states and 99 transitions. [2024-06-27 17:47:12,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 57 transitions, 223 flow [2024-06-27 17:47:12,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:47:12,054 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 89 flow [2024-06-27 17:47:12,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2024-06-27 17:47:12,055 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2024-06-27 17:47:12,056 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 89 flow [2024-06-27 17:47:12,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:12,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:12,056 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:12,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:47:12,057 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)] === [2024-06-27 17:47:12,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:12,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1184116930, now seen corresponding path program 1 times [2024-06-27 17:47:12,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:12,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205166384] [2024-06-27 17:47:12,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:12,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:12,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:12,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205166384] [2024-06-27 17:47:12,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205166384] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:47:12,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124862980] [2024-06-27 17:47:12,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:12,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:12,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:47:12,228 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:47:12,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 17:47:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:12,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-27 17:47:12,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:47:12,383 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 [2024-06-27 17:47:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:12,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:47:12,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:12,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124862980] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:47:12,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:47:12,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-06-27 17:47:12,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613171210] [2024-06-27 17:47:12,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:47:12,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:47:12,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:12,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:47:12,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:47:12,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 17:47:12,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 89 flow. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:12,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:12,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 17:47:12,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:12,908 INFO L124 PetriNetUnfolderBase]: 1287/2419 cut-off events. [2024-06-27 17:47:12,908 INFO L125 PetriNetUnfolderBase]: For 306/308 co-relation queries the response was YES. [2024-06-27 17:47:12,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5081 conditions, 2419 events. 1287/2419 cut-off events. For 306/308 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 13254 event pairs, 156 based on Foata normal form. 48/2357 useless extension candidates. Maximal degree in co-relation 5072. Up to 380 conditions per place. [2024-06-27 17:47:12,920 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 172 selfloop transitions, 32 changer transitions 4/215 dead transitions. [2024-06-27 17:47:12,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 215 transitions, 941 flow [2024-06-27 17:47:12,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 17:47:12,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 17:47:12,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 382 transitions. [2024-06-27 17:47:12,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.652991452991453 [2024-06-27 17:47:12,923 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 89 flow. Second operand 15 states and 382 transitions. [2024-06-27 17:47:12,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 215 transitions, 941 flow [2024-06-27 17:47:12,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 215 transitions, 937 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:47:12,927 INFO L231 Difference]: Finished difference. Result has 58 places, 69 transitions, 336 flow [2024-06-27 17:47:12,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=336, PETRI_PLACES=58, PETRI_TRANSITIONS=69} [2024-06-27 17:47:12,927 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 21 predicate places. [2024-06-27 17:47:12,928 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 69 transitions, 336 flow [2024-06-27 17:47:12,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:12,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:12,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:12,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 17:47:13,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:13,141 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 17:47:13,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:13,142 INFO L85 PathProgramCache]: Analyzing trace with hash -2037359109, now seen corresponding path program 1 times [2024-06-27 17:47:13,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:13,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992687924] [2024-06-27 17:47:13,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:13,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:13,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:13,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992687924] [2024-06-27 17:47:13,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992687924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:13,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:13,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:47:13,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623068368] [2024-06-27 17:47:13,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:13,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:47:13,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:13,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:47:13,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:47:13,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-27 17:47:13,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 69 transitions, 336 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 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) [2024-06-27 17:47:13,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:13,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-27 17:47:13,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:13,395 INFO L124 PetriNetUnfolderBase]: 699/1431 cut-off events. [2024-06-27 17:47:13,395 INFO L125 PetriNetUnfolderBase]: For 648/648 co-relation queries the response was YES. [2024-06-27 17:47:13,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3236 conditions, 1431 events. 699/1431 cut-off events. For 648/648 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7599 event pairs, 245 based on Foata normal form. 66/1477 useless extension candidates. Maximal degree in co-relation 3219. Up to 665 conditions per place. [2024-06-27 17:47:13,402 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 45 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2024-06-27 17:47:13,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 352 flow [2024-06-27 17:47:13,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:47:13,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:47:13,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-27 17:47:13,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-27 17:47:13,404 INFO L175 Difference]: Start difference. First operand has 58 places, 69 transitions, 336 flow. Second operand 3 states and 72 transitions. [2024-06-27 17:47:13,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 352 flow [2024-06-27 17:47:13,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 63 transitions, 320 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 17:47:13,413 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 205 flow [2024-06-27 17:47:13,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2024-06-27 17:47:13,414 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 17 predicate places. [2024-06-27 17:47:13,414 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 205 flow [2024-06-27 17:47:13,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 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) [2024-06-27 17:47:13,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:13,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:13,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:47:13,415 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 17:47:13,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:13,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1374515132, now seen corresponding path program 1 times [2024-06-27 17:47:13,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:13,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035215504] [2024-06-27 17:47:13,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:13,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:13,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:13,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:13,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035215504] [2024-06-27 17:47:13,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035215504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:13,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:13,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:47:13,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750140425] [2024-06-27 17:47:13,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:13,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:47:13,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:13,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:47:13,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:47:13,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-27 17:47:13,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:13,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:13,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-27 17:47:13,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:13,904 INFO L124 PetriNetUnfolderBase]: 870/1774 cut-off events. [2024-06-27 17:47:13,904 INFO L125 PetriNetUnfolderBase]: For 616/616 co-relation queries the response was YES. [2024-06-27 17:47:13,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4048 conditions, 1774 events. 870/1774 cut-off events. For 616/616 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 9535 event pairs, 263 based on Foata normal form. 0/1749 useless extension candidates. Maximal degree in co-relation 4033. Up to 1012 conditions per place. [2024-06-27 17:47:13,912 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 64 selfloop transitions, 7 changer transitions 4/89 dead transitions. [2024-06-27 17:47:13,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 89 transitions, 468 flow [2024-06-27 17:47:13,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:47:13,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:47:13,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-27 17:47:13,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-27 17:47:13,913 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 205 flow. Second operand 5 states and 120 transitions. [2024-06-27 17:47:13,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 89 transitions, 468 flow [2024-06-27 17:47:13,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 89 transitions, 457 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:47:13,917 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 261 flow [2024-06-27 17:47:13,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=261, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-06-27 17:47:13,918 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 23 predicate places. [2024-06-27 17:47:13,918 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 261 flow [2024-06-27 17:47:13,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:13,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:13,919 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] [2024-06-27 17:47:13,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:47:13,919 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 17:47:13,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:13,919 INFO L85 PathProgramCache]: Analyzing trace with hash 260817475, now seen corresponding path program 1 times [2024-06-27 17:47:13,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:13,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045383409] [2024-06-27 17:47:13,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:13,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:14,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:14,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:14,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045383409] [2024-06-27 17:47:14,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045383409] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:47:14,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070556572] [2024-06-27 17:47:14,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:14,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:14,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:47:14,325 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:47:14,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 17:47:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:14,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-27 17:47:14,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:47:14,469 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 [2024-06-27 17:47:14,525 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 [2024-06-27 17:47:14,598 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 [2024-06-27 17:47:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:14,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:47:14,855 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 [2024-06-27 17:47:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:14,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070556572] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:47:14,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:47:14,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-06-27 17:47:14,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015293633] [2024-06-27 17:47:14,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:47:14,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 17:47:14,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:14,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 17:47:14,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-06-27 17:47:14,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 17:47:14,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 261 flow. Second operand has 14 states, 14 states have (on average 15.071428571428571) internal successors, (211), 14 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:14,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:14,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 17:47:14,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:15,760 INFO L124 PetriNetUnfolderBase]: 1782/3555 cut-off events. [2024-06-27 17:47:15,760 INFO L125 PetriNetUnfolderBase]: For 1628/1628 co-relation queries the response was YES. [2024-06-27 17:47:15,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8096 conditions, 3555 events. 1782/3555 cut-off events. For 1628/1628 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 19928 event pairs, 344 based on Foata normal form. 14/3498 useless extension candidates. Maximal degree in co-relation 8076. Up to 566 conditions per place. [2024-06-27 17:47:15,817 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 207 selfloop transitions, 52 changer transitions 18/284 dead transitions. [2024-06-27 17:47:15,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 284 transitions, 1517 flow [2024-06-27 17:47:15,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 17:47:15,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 17:47:15,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 507 transitions. [2024-06-27 17:47:15,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-27 17:47:15,819 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 261 flow. Second operand 22 states and 507 transitions. [2024-06-27 17:47:15,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 284 transitions, 1517 flow [2024-06-27 17:47:15,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 284 transitions, 1509 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 17:47:15,828 INFO L231 Difference]: Finished difference. Result has 85 places, 92 transitions, 549 flow [2024-06-27 17:47:15,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=549, PETRI_PLACES=85, PETRI_TRANSITIONS=92} [2024-06-27 17:47:15,829 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 48 predicate places. [2024-06-27 17:47:15,829 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 92 transitions, 549 flow [2024-06-27 17:47:15,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.071428571428571) internal successors, (211), 14 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:15,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:15,829 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] [2024-06-27 17:47:15,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 17:47:16,041 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,SelfDestructingSolverStorable5 [2024-06-27 17:47:16,042 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 17:47:16,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:16,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1799931214, now seen corresponding path program 1 times [2024-06-27 17:47:16,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:16,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527142666] [2024-06-27 17:47:16,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:16,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 17:47:16,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:16,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527142666] [2024-06-27 17:47:16,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527142666] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:47:16,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770605760] [2024-06-27 17:47:16,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:16,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:16,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:47:16,186 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:47:16,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 17:47:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:16,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:47:16,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:47:16,330 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 [2024-06-27 17:47:16,368 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 [2024-06-27 17:47:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:16,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:47:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:47:16,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770605760] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:47:16,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:47:16,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2024-06-27 17:47:16,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212881543] [2024-06-27 17:47:16,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:47:16,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:47:16,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:16,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:47:16,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:47:16,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 17:47:16,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 92 transitions, 549 flow. Second operand has 12 states, 12 states have (on average 16.666666666666668) internal successors, (200), 12 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:16,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:16,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 17:47:16,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:17,513 INFO L124 PetriNetUnfolderBase]: 2832/5619 cut-off events. [2024-06-27 17:47:17,513 INFO L125 PetriNetUnfolderBase]: For 4855/4855 co-relation queries the response was YES. [2024-06-27 17:47:17,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13368 conditions, 5619 events. 2832/5619 cut-off events. For 4855/4855 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 32531 event pairs, 418 based on Foata normal form. 66/5621 useless extension candidates. Maximal degree in co-relation 13342. Up to 908 conditions per place. [2024-06-27 17:47:17,540 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 198 selfloop transitions, 90 changer transitions 8/303 dead transitions. [2024-06-27 17:47:17,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 303 transitions, 1891 flow [2024-06-27 17:47:17,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 17:47:17,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 17:47:17,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 437 transitions. [2024-06-27 17:47:17,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-27 17:47:17,542 INFO L175 Difference]: Start difference. First operand has 85 places, 92 transitions, 549 flow. Second operand 19 states and 437 transitions. [2024-06-27 17:47:17,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 303 transitions, 1891 flow [2024-06-27 17:47:17,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 303 transitions, 1861 flow, removed 15 selfloop flow, removed 0 redundant places. [2024-06-27 17:47:17,569 INFO L231 Difference]: Finished difference. Result has 109 places, 134 transitions, 1063 flow [2024-06-27 17:47:17,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1063, PETRI_PLACES=109, PETRI_TRANSITIONS=134} [2024-06-27 17:47:17,569 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 72 predicate places. [2024-06-27 17:47:17,570 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 134 transitions, 1063 flow [2024-06-27 17:47:17,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.666666666666668) internal successors, (200), 12 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:17,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:17,570 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] [2024-06-27 17:47:17,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 17:47:17,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:17,782 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 17:47:17,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:17,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1464249392, now seen corresponding path program 1 times [2024-06-27 17:47:17,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:17,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248153370] [2024-06-27 17:47:17,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:17,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:18,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:18,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248153370] [2024-06-27 17:47:18,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248153370] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:47:18,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210701988] [2024-06-27 17:47:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:18,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:18,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:47:18,208 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:47:18,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 17:47:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:18,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 17:47:18,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:47:18,385 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 [2024-06-27 17:47:18,470 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 82 treesize of output 66 [2024-06-27 17:47:18,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 94 [2024-06-27 17:47:18,500 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:47:18,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 88 treesize of output 43 [2024-06-27 17:47:18,822 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:47:18,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 113 treesize of output 57 [2024-06-27 17:47:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:18,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:47:19,327 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:47:19,328 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 [2024-06-27 17:47:19,354 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2024-06-27 17:47:19,355 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 81 treesize of output 68 [2024-06-27 17:47:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:19,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210701988] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:47:19,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:47:19,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-06-27 17:47:19,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379060303] [2024-06-27 17:47:19,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:47:19,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 17:47:19,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:19,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 17:47:19,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-06-27 17:47:19,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 17:47:19,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 134 transitions, 1063 flow. Second operand has 17 states, 17 states have (on average 15.235294117647058) internal successors, (259), 17 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:19,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:19,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 17:47:19,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:21,809 INFO L124 PetriNetUnfolderBase]: 4102/8100 cut-off events. [2024-06-27 17:47:21,809 INFO L125 PetriNetUnfolderBase]: For 10671/10671 co-relation queries the response was YES. [2024-06-27 17:47:21,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20473 conditions, 8100 events. 4102/8100 cut-off events. For 10671/10671 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 49357 event pairs, 993 based on Foata normal form. 56/8078 useless extension candidates. Maximal degree in co-relation 20439. Up to 1340 conditions per place. [2024-06-27 17:47:21,888 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 219 selfloop transitions, 127 changer transitions 36/389 dead transitions. [2024-06-27 17:47:21,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 389 transitions, 2847 flow [2024-06-27 17:47:21,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 17:47:21,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 17:47:21,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 549 transitions. [2024-06-27 17:47:21,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.563076923076923 [2024-06-27 17:47:21,906 INFO L175 Difference]: Start difference. First operand has 109 places, 134 transitions, 1063 flow. Second operand 25 states and 549 transitions. [2024-06-27 17:47:21,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 389 transitions, 2847 flow [2024-06-27 17:47:21,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 389 transitions, 2774 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 17:47:21,950 INFO L231 Difference]: Finished difference. Result has 135 places, 178 transitions, 1709 flow [2024-06-27 17:47:21,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1709, PETRI_PLACES=135, PETRI_TRANSITIONS=178} [2024-06-27 17:47:21,953 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 98 predicate places. [2024-06-27 17:47:21,953 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 178 transitions, 1709 flow [2024-06-27 17:47:21,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.235294117647058) internal successors, (259), 17 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:21,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:21,954 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:21,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 17:47:22,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:22,167 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)] === [2024-06-27 17:47:22,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:22,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1937155437, now seen corresponding path program 2 times [2024-06-27 17:47:22,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:22,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431328132] [2024-06-27 17:47:22,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:22,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:22,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:22,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431328132] [2024-06-27 17:47:22,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431328132] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:47:22,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060434031] [2024-06-27 17:47:22,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:47:22,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:22,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:47:22,393 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:47:22,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 17:47:22,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:47:22,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:47:22,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-27 17:47:22,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:47:22,521 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 [2024-06-27 17:47:22,541 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 [2024-06-27 17:47:22,561 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 [2024-06-27 17:47:22,584 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 [2024-06-27 17:47:22,614 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:22,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:47:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:22,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060434031] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:47:22,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:47:22,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-06-27 17:47:22,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054018322] [2024-06-27 17:47:22,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:47:22,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 17:47:22,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:22,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 17:47:22,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2024-06-27 17:47:22,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 17:47:22,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 178 transitions, 1709 flow. Second operand has 19 states, 19 states have (on average 14.894736842105264) internal successors, (283), 19 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:22,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:22,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 17:47:22,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:24,586 INFO L124 PetriNetUnfolderBase]: 6206/12321 cut-off events. [2024-06-27 17:47:24,586 INFO L125 PetriNetUnfolderBase]: For 24298/24298 co-relation queries the response was YES. [2024-06-27 17:47:24,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32773 conditions, 12321 events. 6206/12321 cut-off events. For 24298/24298 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 82154 event pairs, 1653 based on Foata normal form. 161/12446 useless extension candidates. Maximal degree in co-relation 32735. Up to 2190 conditions per place. [2024-06-27 17:47:24,645 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 231 selfloop transitions, 203 changer transitions 2/443 dead transitions. [2024-06-27 17:47:24,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 443 transitions, 4001 flow [2024-06-27 17:47:24,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 17:47:24,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 17:47:24,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 469 transitions. [2024-06-27 17:47:24,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5726495726495726 [2024-06-27 17:47:24,647 INFO L175 Difference]: Start difference. First operand has 135 places, 178 transitions, 1709 flow. Second operand 21 states and 469 transitions. [2024-06-27 17:47:24,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 443 transitions, 4001 flow [2024-06-27 17:47:24,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 443 transitions, 3896 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 17:47:24,750 INFO L231 Difference]: Finished difference. Result has 161 places, 267 transitions, 3034 flow [2024-06-27 17:47:24,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1621, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3034, PETRI_PLACES=161, PETRI_TRANSITIONS=267} [2024-06-27 17:47:24,752 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 124 predicate places. [2024-06-27 17:47:24,752 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 267 transitions, 3034 flow [2024-06-27 17:47:24,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 14.894736842105264) internal successors, (283), 19 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:24,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:24,753 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:24,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 17:47:24,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:24,960 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 17:47:24,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:24,961 INFO L85 PathProgramCache]: Analyzing trace with hash 803533486, now seen corresponding path program 3 times [2024-06-27 17:47:24,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:24,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270785942] [2024-06-27 17:47:24,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:24,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 55 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:25,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:25,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270785942] [2024-06-27 17:47:25,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270785942] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:47:25,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098872783] [2024-06-27 17:47:25,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:47:25,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:25,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:47:25,059 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:47:25,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 17:47:25,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-06-27 17:47:25,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:47:25,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 7 conjunts are in the unsatisfiable core [2024-06-27 17:47:25,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:47:25,237 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:25,237 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 17:47:25,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098872783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:25,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 17:47:25,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2024-06-27 17:47:25,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209810993] [2024-06-27 17:47:25,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:25,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:47:25,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:25,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:47:25,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:47:25,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 17:47:25,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 267 transitions, 3034 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:25,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:25,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 17:47:25,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:26,744 INFO L124 PetriNetUnfolderBase]: 6581/12296 cut-off events. [2024-06-27 17:47:26,744 INFO L125 PetriNetUnfolderBase]: For 24477/24479 co-relation queries the response was YES. [2024-06-27 17:47:26,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33271 conditions, 12296 events. 6581/12296 cut-off events. For 24477/24479 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 82407 event pairs, 405 based on Foata normal form. 2/11667 useless extension candidates. Maximal degree in co-relation 33223. Up to 3831 conditions per place. [2024-06-27 17:47:26,797 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 242 selfloop transitions, 10 changer transitions 103/379 dead transitions. [2024-06-27 17:47:26,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 379 transitions, 4300 flow [2024-06-27 17:47:26,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:47:26,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:47:26,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-27 17:47:26,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:47:26,798 INFO L175 Difference]: Start difference. First operand has 161 places, 267 transitions, 3034 flow. Second operand 8 states and 208 transitions. [2024-06-27 17:47:26,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 379 transitions, 4300 flow [2024-06-27 17:47:26,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 379 transitions, 3622 flow, removed 53 selfloop flow, removed 34 redundant places. [2024-06-27 17:47:26,881 INFO L231 Difference]: Finished difference. Result has 133 places, 125 transitions, 964 flow [2024-06-27 17:47:26,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=964, PETRI_PLACES=133, PETRI_TRANSITIONS=125} [2024-06-27 17:47:26,882 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 96 predicate places. [2024-06-27 17:47:26,882 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 125 transitions, 964 flow [2024-06-27 17:47:26,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:26,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:26,883 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] [2024-06-27 17:47:26,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-06-27 17:47:27,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:27,096 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 17:47:27,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:27,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1327042990, now seen corresponding path program 2 times [2024-06-27 17:47:27,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:27,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592343636] [2024-06-27 17:47:27,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:27,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:28,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:28,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592343636] [2024-06-27 17:47:28,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592343636] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:47:28,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877787628] [2024-06-27 17:47:28,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:47:28,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:28,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:47:28,094 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:47:28,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 17:47:28,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:47:28,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:47:28,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 17:47:28,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:47:28,295 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 [2024-06-27 17:47:28,351 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 66 treesize of output 50 [2024-06-27 17:47:28,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 72 [2024-06-27 17:47:28,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2024-06-27 17:47:28,566 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 123 treesize of output 95 [2024-06-27 17:47:28,571 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:47:28,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 111 [2024-06-27 17:47:28,603 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:47:28,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 105 treesize of output 69 [2024-06-27 17:47:30,091 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:47:30,092 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 227 treesize of output 107 [2024-06-27 17:47:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:30,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:47:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:30,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877787628] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:47:30,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:47:30,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2024-06-27 17:47:30,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485519386] [2024-06-27 17:47:30,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:47:30,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 17:47:30,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:30,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 17:47:30,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2024-06-27 17:47:30,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 17:47:30,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 125 transitions, 964 flow. Second operand has 26 states, 26 states have (on average 14.923076923076923) internal successors, (388), 26 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:30,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:30,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 17:47:30,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:33,093 INFO L124 PetriNetUnfolderBase]: 4553/9133 cut-off events. [2024-06-27 17:47:33,093 INFO L125 PetriNetUnfolderBase]: For 19820/20208 co-relation queries the response was YES. [2024-06-27 17:47:33,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25311 conditions, 9133 events. 4553/9133 cut-off events. For 19820/20208 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 61836 event pairs, 556 based on Foata normal form. 171/9285 useless extension candidates. Maximal degree in co-relation 25279. Up to 1565 conditions per place. [2024-06-27 17:47:33,133 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 184 selfloop transitions, 44 changer transitions 247/481 dead transitions. [2024-06-27 17:47:33,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 481 transitions, 3425 flow [2024-06-27 17:47:33,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-06-27 17:47:33,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-06-27 17:47:33,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 647 transitions. [2024-06-27 17:47:33,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5184294871794872 [2024-06-27 17:47:33,136 INFO L175 Difference]: Start difference. First operand has 133 places, 125 transitions, 964 flow. Second operand 32 states and 647 transitions. [2024-06-27 17:47:33,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 481 transitions, 3425 flow [2024-06-27 17:47:33,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 481 transitions, 3342 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-27 17:47:33,169 INFO L231 Difference]: Finished difference. Result has 151 places, 88 transitions, 718 flow [2024-06-27 17:47:33,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=718, PETRI_PLACES=151, PETRI_TRANSITIONS=88} [2024-06-27 17:47:33,169 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 114 predicate places. [2024-06-27 17:47:33,170 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 88 transitions, 718 flow [2024-06-27 17:47:33,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.923076923076923) internal successors, (388), 26 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:33,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:33,170 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:33,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 17:47:33,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:33,383 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)] === [2024-06-27 17:47:33,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:33,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1610646762, now seen corresponding path program 3 times [2024-06-27 17:47:33,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:33,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299394428] [2024-06-27 17:47:33,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:33,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:34,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:34,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299394428] [2024-06-27 17:47:34,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299394428] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:47:34,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267109038] [2024-06-27 17:47:34,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:47:34,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:34,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:47:34,321 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:47:34,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 17:47:34,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 17:47:34,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:47:34,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 17:47:34,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:47:34,583 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 [2024-06-27 17:47:34,662 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 80 treesize of output 64 [2024-06-27 17:47:34,673 INFO L349 Elim1Store]: treesize reduction 63, result has 13.7 percent of original size [2024-06-27 17:47:34,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 80 [2024-06-27 17:47:34,699 INFO L349 Elim1Store]: treesize reduction 44, result has 21.4 percent of original size [2024-06-27 17:47:34,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 42 [2024-06-27 17:47:34,853 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 159 treesize of output 131 [2024-06-27 17:47:34,858 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:47:34,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 135 [2024-06-27 17:47:34,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 91 [2024-06-27 17:47:35,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 287 treesize of output 118 [2024-06-27 17:47:40,165 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:47:40,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 245 treesize of output 113 [2024-06-27 17:47:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:40,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:47:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 12 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:40,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267109038] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:47:40,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:47:40,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 32 [2024-06-27 17:47:40,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237117550] [2024-06-27 17:47:40,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:47:40,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 17:47:40,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:40,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 17:47:40,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2024-06-27 17:47:40,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 17:47:40,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 88 transitions, 718 flow. Second operand has 32 states, 32 states have (on average 15.125) internal successors, (484), 32 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:40,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:40,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 17:47:40,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:45,031 INFO L124 PetriNetUnfolderBase]: 2223/4730 cut-off events. [2024-06-27 17:47:45,031 INFO L125 PetriNetUnfolderBase]: For 12734/12810 co-relation queries the response was YES. [2024-06-27 17:47:45,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13506 conditions, 4730 events. 2223/4730 cut-off events. For 12734/12810 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 28893 event pairs, 262 based on Foata normal form. 39/4764 useless extension candidates. Maximal degree in co-relation 13461. Up to 845 conditions per place. [2024-06-27 17:47:45,079 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 116 selfloop transitions, 15 changer transitions 233/370 dead transitions. [2024-06-27 17:47:45,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 370 transitions, 2522 flow [2024-06-27 17:47:45,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-06-27 17:47:45,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-06-27 17:47:45,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 648 transitions. [2024-06-27 17:47:45,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034965034965035 [2024-06-27 17:47:45,081 INFO L175 Difference]: Start difference. First operand has 151 places, 88 transitions, 718 flow. Second operand 33 states and 648 transitions. [2024-06-27 17:47:45,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 370 transitions, 2522 flow [2024-06-27 17:47:45,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 370 transitions, 2322 flow, removed 57 selfloop flow, removed 33 redundant places. [2024-06-27 17:47:45,107 INFO L231 Difference]: Finished difference. Result has 143 places, 48 transitions, 301 flow [2024-06-27 17:47:45,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=301, PETRI_PLACES=143, PETRI_TRANSITIONS=48} [2024-06-27 17:47:45,108 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 106 predicate places. [2024-06-27 17:47:45,108 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 48 transitions, 301 flow [2024-06-27 17:47:45,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 15.125) internal successors, (484), 32 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:45,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:45,108 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:45,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-06-27 17:47:45,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-06-27 17:47:45,333 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 17:47:45,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:45,334 INFO L85 PathProgramCache]: Analyzing trace with hash 584915566, now seen corresponding path program 4 times [2024-06-27 17:47:45,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:45,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872501099] [2024-06-27 17:47:45,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:45,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 17 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:46,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:46,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872501099] [2024-06-27 17:47:46,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872501099] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:47:46,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915955210] [2024-06-27 17:47:46,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:47:46,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:46,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:47:46,804 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:47:46,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 17:47:46,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:47:46,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:47:46,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 17:47:46,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:47:46,989 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 [2024-06-27 17:47:47,041 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 66 treesize of output 50 [2024-06-27 17:47:47,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 72 [2024-06-27 17:47:47,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 31 [2024-06-27 17:47:47,209 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 123 treesize of output 95 [2024-06-27 17:47:47,213 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:47:47,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 111 [2024-06-27 17:47:47,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 32 [2024-06-27 17:47:47,672 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 237 treesize of output 185 [2024-06-27 17:47:47,679 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:47:47,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 185 treesize of output 175 [2024-06-27 17:47:47,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 158 [2024-06-27 17:47:48,733 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 465 treesize of output 365 [2024-06-27 17:47:48,739 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:47:48,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 365 treesize of output 289 [2024-06-27 17:47:48,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 391 treesize of output 313 [2024-06-27 17:48:01,427 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:48:01,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 911 treesize of output 407 [2024-06-27 17:48:01,502 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:01,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:48:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:02,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915955210] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:48:02,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:48:02,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-06-27 17:48:02,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799488692] [2024-06-27 17:48:02,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:48:02,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-06-27 17:48:02,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:02,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-06-27 17:48:02,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1119, Unknown=0, NotChecked=0, Total=1406 [2024-06-27 17:48:02,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 17:48:02,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 48 transitions, 301 flow. Second operand has 38 states, 38 states have (on average 15.263157894736842) internal successors, (580), 38 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:48:02,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:02,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 17:48:02,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:05,897 INFO L124 PetriNetUnfolderBase]: 510/1117 cut-off events. [2024-06-27 17:48:05,897 INFO L125 PetriNetUnfolderBase]: For 1741/1741 co-relation queries the response was YES. [2024-06-27 17:48:05,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3049 conditions, 1117 events. 510/1117 cut-off events. For 1741/1741 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3972 event pairs, 41 based on Foata normal form. 14/1126 useless extension candidates. Maximal degree in co-relation 3024. Up to 174 conditions per place. [2024-06-27 17:48:05,900 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 0 selfloop transitions, 0 changer transitions 150/150 dead transitions. [2024-06-27 17:48:05,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 150 transitions, 870 flow [2024-06-27 17:48:05,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 17:48:05,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 17:48:05,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 356 transitions. [2024-06-27 17:48:05,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48043184885290147 [2024-06-27 17:48:05,902 INFO L175 Difference]: Start difference. First operand has 143 places, 48 transitions, 301 flow. Second operand 19 states and 356 transitions. [2024-06-27 17:48:05,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 150 transitions, 870 flow [2024-06-27 17:48:05,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 150 transitions, 768 flow, removed 12 selfloop flow, removed 42 redundant places. [2024-06-27 17:48:05,907 INFO L231 Difference]: Finished difference. Result has 81 places, 0 transitions, 0 flow [2024-06-27 17:48:05,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=0, PETRI_PLACES=81, PETRI_TRANSITIONS=0} [2024-06-27 17:48:05,908 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 44 predicate places. [2024-06-27 17:48:05,908 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 0 transitions, 0 flow [2024-06-27 17:48:05,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 15.263157894736842) internal successors, (580), 38 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:48:05,911 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 8 remaining) [2024-06-27 17:48:05,911 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 8 remaining) [2024-06-27 17:48:05,911 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 8 remaining) [2024-06-27 17:48:05,911 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 8 remaining) [2024-06-27 17:48:05,911 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2024-06-27 17:48:05,912 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2024-06-27 17:48:05,912 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2024-06-27 17:48:05,912 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2024-06-27 17:48:05,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-27 17:48:06,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-06-27 17:48:06,124 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:06,128 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 17:48:06,129 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 17:48:06,132 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-27 17:48:06,132 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-27 17:48:06,133 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 05:48:06 BasicIcfg [2024-06-27 17:48:06,133 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 17:48:06,133 INFO L158 Benchmark]: Toolchain (without parser) took 56366.66ms. Allocated memory was 155.2MB in the beginning and 3.1GB in the end (delta: 3.0GB). Free memory was 123.3MB in the beginning and 2.5GB in the end (delta: -2.4GB). Peak memory consumption was 575.9MB. Max. memory is 16.1GB. [2024-06-27 17:48:06,134 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 119.5MB. Free memory is still 73.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 17:48:06,134 INFO L158 Benchmark]: Witness Parser took 0.18ms. Allocated memory is still 155.2MB. Free memory is still 126.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 17:48:06,134 INFO L158 Benchmark]: CACSL2BoogieTranslator took 598.46ms. Allocated memory is still 155.2MB. Free memory was 123.3MB in the beginning and 86.6MB in the end (delta: 36.7MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2024-06-27 17:48:06,135 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.76ms. Allocated memory is still 155.2MB. Free memory was 86.6MB in the beginning and 83.4MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-27 17:48:06,135 INFO L158 Benchmark]: Boogie Preprocessor took 35.37ms. Allocated memory is still 155.2MB. Free memory was 83.4MB in the beginning and 81.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 17:48:06,135 INFO L158 Benchmark]: RCFGBuilder took 634.54ms. Allocated memory is still 155.2MB. Free memory was 80.5MB in the beginning and 111.2MB in the end (delta: -30.7MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2024-06-27 17:48:06,135 INFO L158 Benchmark]: TraceAbstraction took 55051.97ms. Allocated memory was 155.2MB in the beginning and 3.1GB in the end (delta: 3.0GB). Free memory was 110.2MB in the beginning and 2.5GB in the end (delta: -2.4GB). Peak memory consumption was 566.0MB. Max. memory is 16.1GB. [2024-06-27 17:48:06,138 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 119.5MB. Free memory is still 73.1MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.18ms. Allocated memory is still 155.2MB. Free memory is still 126.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 598.46ms. Allocated memory is still 155.2MB. Free memory was 123.3MB in the beginning and 86.6MB in the end (delta: 36.7MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.76ms. Allocated memory is still 155.2MB. Free memory was 86.6MB in the beginning and 83.4MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.37ms. Allocated memory is still 155.2MB. Free memory was 83.4MB in the beginning and 81.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 634.54ms. Allocated memory is still 155.2MB. Free memory was 80.5MB in the beginning and 111.2MB in the end (delta: -30.7MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. * TraceAbstraction took 55051.97ms. Allocated memory was 155.2MB in the beginning and 3.1GB in the end (delta: 3.0GB). Free memory was 110.2MB in the beginning and 2.5GB in the end (delta: -2.4GB). Peak memory consumption was 566.0MB. 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 - PositiveResult [Line: 941]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 941]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 58 locations, 8 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 54.9s, OverallIterations: 13, TraceHistogramMax: 6, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 18.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3477 SdHoareTripleChecker+Valid, 5.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3467 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 4.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 278 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9196 IncrementalHoareTripleChecker+Invalid, 9474 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 278 mSolverCounterUnsat, 0 mSDtfsCounter, 9196 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 880 GetRequests, 589 SyntacticMatches, 3 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2102 ImplicationChecksByTransitivity, 9.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3034occurred in iteration=9, InterpolantAutomatonStates: 209, 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: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 32.2s InterpolantComputationTime, 748 NumberOfCodeBlocks, 748 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1028 ConstructedInterpolants, 10 QuantifiedInterpolants, 67791 SizeOfPredicates, 118 NumberOfNonLiveVariables, 2299 ConjunctsInSsa, 137 ConjunctsInUnsatCore, 30 InterpolantComputations, 5 PerfectInterpolantSequences, 230/1075 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 4 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-27 17:48:06,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE