./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs-pthread.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/35_double_lock_p3_vs-pthread.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fced0e87 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-ext/35_double_lock_p3_vs-pthread.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/35_double_lock_p3_vs-pthread.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.extract-columns-fced0e8-m [2024-01-31 16:01:55,798 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:01:55,880 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:01:55,885 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:01:55,885 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:01:55,910 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:01:55,911 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:01:55,911 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:01:55,912 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:01:55,915 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:01:55,916 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:01:55,916 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:01:55,917 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:01:55,918 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:01:55,918 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:01:55,918 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:01:55,919 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:01:55,919 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:01:55,919 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:01:55,919 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:01:55,919 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:01:55,920 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:01:55,920 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:01:55,920 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:01:55,920 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:01:55,921 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:01:55,921 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:01:55,921 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:01:55,922 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:01:55,922 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:01:55,923 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:01:55,923 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:01:55,923 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:01:55,923 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:01:55,923 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:01:55,924 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:01:55,924 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:01:55,924 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:01:55,924 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:01:55,924 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:01:55,924 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:01:55,925 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:01:55,925 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:01:55,925 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:01:56,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:01:56,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:01:56,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:01:56,211 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:01:56,212 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:01:56,213 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs-pthread.i [2024-01-31 16:01:57,370 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:01:57,613 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:01:57,616 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs-pthread.i [2024-01-31 16:01:57,633 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2145e381/e011c772b6e64e55ad13f6f41acc08ae/FLAG82831b00e [2024-01-31 16:01:57,643 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2145e381/e011c772b6e64e55ad13f6f41acc08ae [2024-01-31 16:01:57,645 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:01:57,645 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:01:57,646 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/35_double_lock_p3_vs-pthread.yml/witness.yml [2024-01-31 16:01:57,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:01:57,728 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:01:57,730 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:01:57,730 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:01:57,734 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:01:57,734 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:01:57" (1/2) ... [2024-01-31 16:01:57,735 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ab65e39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:01:57, skipping insertion in model container [2024-01-31 16:01:57,736 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:01:57" (1/2) ... [2024-01-31 16:01:57,737 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@784a0905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:01:57, skipping insertion in model container [2024-01-31 16:01:57,737 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:01:57" (2/2) ... [2024-01-31 16:01:57,737 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ab65e39 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:57, skipping insertion in model container [2024-01-31 16:01:57,738 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:01:57" (2/2) ... [2024-01-31 16:01:57,738 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:01:57,787 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:01:57,788 INFO L98 nessWitnessExtractor]: Location invariant before [L697-L697] count == 0 [2024-01-31 16:01:57,788 INFO L98 nessWitnessExtractor]: Location invariant before [L695-L695] count == 0 [2024-01-31 16:01:57,789 INFO L98 nessWitnessExtractor]: Location invariant before [L691-L691] count == 0 [2024-01-31 16:01:57,789 INFO L98 nessWitnessExtractor]: Location invariant before [L719-L719] count == 0 [2024-01-31 16:01:57,789 INFO L98 nessWitnessExtractor]: Location invariant before [L705-L705] (count == 0) && ((unsigned long )arg == 0UL) [2024-01-31 16:01:57,789 INFO L98 nessWitnessExtractor]: Location invariant before [L712-L712] (unsigned long )arg == 0UL [2024-01-31 16:01:57,790 INFO L98 nessWitnessExtractor]: Location invariant before [L704-L704] (unsigned long )arg == 0UL [2024-01-31 16:01:57,790 INFO L98 nessWitnessExtractor]: Location invariant before [L696-L696] count == -1 [2024-01-31 16:01:57,790 INFO L98 nessWitnessExtractor]: Location invariant before [L692-L692] count == 1 [2024-01-31 16:01:57,790 INFO L98 nessWitnessExtractor]: Location invariant before [L706-L706] (count == 0) && ((unsigned long )arg == 0UL) [2024-01-31 16:01:57,790 INFO L98 nessWitnessExtractor]: Location invariant before [L713-L713] (unsigned long )arg == 0UL [2024-01-31 16:01:57,790 INFO L98 nessWitnessExtractor]: Loop invariant at [L702-L702] (unsigned long )arg == 0UL [2024-01-31 16:01:57,790 INFO L98 nessWitnessExtractor]: Location invariant before [L693-L693] count == 0 [2024-01-31 16:01:57,791 INFO L98 nessWitnessExtractor]: Location invariant before [L714-L714] (unsigned long )arg == 0UL [2024-01-31 16:01:57,832 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:01:58,184 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs-pthread.i[30711,30724] [2024-01-31 16:01:58,197 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:01:58,209 INFO L204 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-31 16:01:58,300 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs-pthread.i[30711,30724] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-31 16:01:58,304 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:01:58,335 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:01:58,336 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:58 WrapperNode [2024-01-31 16:01:58,336 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:01:58,337 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:01:58,338 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:01:58,338 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:01:58,343 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 31.01 04:01:58" (1/1) ... [2024-01-31 16:01:58,370 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 31.01 04:01:58" (1/1) ... [2024-01-31 16:01:58,391 INFO L138 Inliner]: procedures = 165, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2024-01-31 16:01:58,391 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:01:58,392 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:01:58,392 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:01:58,392 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:01:58,400 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:58" (1/1) ... [2024-01-31 16:01:58,400 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:58" (1/1) ... [2024-01-31 16:01:58,408 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:58" (1/1) ... [2024-01-31 16:01:58,426 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 5, 2]. 56 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 2 writes are split as follows [0, 0, 2]. [2024-01-31 16:01:58,428 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:58" (1/1) ... [2024-01-31 16:01:58,428 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:58" (1/1) ... [2024-01-31 16:01:58,438 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:58" (1/1) ... [2024-01-31 16:01:58,441 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:58" (1/1) ... [2024-01-31 16:01:58,445 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:58" (1/1) ... [2024-01-31 16:01:58,446 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:58" (1/1) ... [2024-01-31 16:01:58,451 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:01:58,453 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:01:58,453 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:01:58,453 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:01:58,454 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:58" (1/1) ... [2024-01-31 16:01:58,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:01:58,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:01:58,478 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) [2024-01-31 16:01:58,496 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 [2024-01-31 16:01:58,512 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-01-31 16:01:58,513 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-01-31 16:01:58,513 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-01-31 16:01:58,513 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-01-31 16:01:58,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:01:58,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:01:58,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:01:58,514 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-31 16:01:58,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:01:58,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:01:58,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:01:58,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:01:58,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:01:58,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:01:58,515 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-31 16:01:58,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:01:58,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:01:58,517 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 16:01:58,633 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:01:58,635 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:01:58,792 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:01:58,792 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:01:58,889 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:01:58,889 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-31 16:01:58,889 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:01:58 BoogieIcfgContainer [2024-01-31 16:01:58,890 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:01:58,891 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:01:58,891 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:01:58,894 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:01:58,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:01:57" (1/4) ... [2024-01-31 16:01:58,894 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b89de3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:01:58, skipping insertion in model container [2024-01-31 16:01:58,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:01:57" (2/4) ... [2024-01-31 16:01:58,895 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b89de3b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:01:58, skipping insertion in model container [2024-01-31 16:01:58,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:58" (3/4) ... [2024-01-31 16:01:58,895 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b89de3b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:01:58, skipping insertion in model container [2024-01-31 16:01:58,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:01:58" (4/4) ... [2024-01-31 16:01:58,896 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs-pthread.i [2024-01-31 16:01:58,910 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:01:58,910 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2024-01-31 16:01:58,910 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:01:58,958 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:01:58,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 61 transitions, 130 flow [2024-01-31 16:01:59,007 INFO L124 PetriNetUnfolderBase]: 4/62 cut-off events. [2024-01-31 16:01:59,008 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:01:59,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 4/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 123 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2024-01-31 16:01:59,012 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 61 transitions, 130 flow [2024-01-31 16:01:59,015 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 60 transitions, 127 flow [2024-01-31 16:01:59,028 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:01:59,037 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;@712911dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:01:59,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-01-31 16:01:59,043 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:01:59,043 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-31 16:01:59,043 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:01:59,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:59,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-31 16:01:59,045 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err8ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-01-31 16:01:59,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:59,049 INFO L85 PathProgramCache]: Analyzing trace with hash 8672, now seen corresponding path program 1 times [2024-01-31 16:01:59,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:59,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519039386] [2024-01-31 16:01:59,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:59,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:59,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:59,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519039386] [2024-01-31 16:01:59,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519039386] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:59,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:59,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:01:59,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429144549] [2024-01-31 16:01:59,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:59,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:01:59,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:59,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:01:59,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:01:59,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 61 [2024-01-31 16:01:59,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2024-01-31 16:01:59,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:59,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 61 [2024-01-31 16:01:59,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:59,644 INFO L124 PetriNetUnfolderBase]: 457/1124 cut-off events. [2024-01-31 16:01:59,644 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 16:01:59,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1910 conditions, 1124 events. 457/1124 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7073 event pairs, 343 based on Foata normal form. 316/1343 useless extension candidates. Maximal degree in co-relation 1898. Up to 689 conditions per place. [2024-01-31 16:01:59,655 INFO L140 encePairwiseOnDemand]: 44/61 looper letters, 27 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-01-31 16:01:59,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 56 transitions, 187 flow [2024-01-31 16:01:59,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:01:59,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:01:59,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2024-01-31 16:01:59,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6502732240437158 [2024-01-31 16:01:59,667 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 127 flow. Second operand 3 states and 119 transitions. [2024-01-31 16:01:59,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 56 transitions, 187 flow [2024-01-31 16:01:59,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:01:59,675 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 144 flow [2024-01-31 16:01:59,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-01-31 16:01:59,679 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -5 predicate places. [2024-01-31 16:01:59,680 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 144 flow [2024-01-31 16:01:59,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2024-01-31 16:01:59,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:59,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-31 16:01:59,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:01:59,681 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err8ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-01-31 16:01:59,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:59,682 INFO L85 PathProgramCache]: Analyzing trace with hash 258703273, now seen corresponding path program 1 times [2024-01-31 16:01:59,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:59,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771854557] [2024-01-31 16:01:59,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:59,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:59,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:59,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771854557] [2024-01-31 16:01:59,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771854557] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:59,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:59,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:01:59,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485644889] [2024-01-31 16:01:59,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:59,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:01:59,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:59,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:01:59,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:01:59,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 61 [2024-01-31 16:01:59,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 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) [2024-01-31 16:01:59,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:59,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 61 [2024-01-31 16:01:59,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:00,073 INFO L124 PetriNetUnfolderBase]: 347/1088 cut-off events. [2024-01-31 16:02:00,074 INFO L125 PetriNetUnfolderBase]: For 189/189 co-relation queries the response was YES. [2024-01-31 16:02:00,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1907 conditions, 1088 events. 347/1088 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 7051 event pairs, 32 based on Foata normal form. 102/1177 useless extension candidates. Maximal degree in co-relation 1892. Up to 444 conditions per place. [2024-01-31 16:02:00,081 INFO L140 encePairwiseOnDemand]: 57/61 looper letters, 40 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2024-01-31 16:02:00,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 68 transitions, 279 flow [2024-01-31 16:02:00,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:00,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:00,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 164 transitions. [2024-01-31 16:02:00,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6721311475409836 [2024-01-31 16:02:00,100 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 144 flow. Second operand 4 states and 164 transitions. [2024-01-31 16:02:00,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 68 transitions, 279 flow [2024-01-31 16:02:00,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 68 transitions, 257 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:00,106 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 130 flow [2024-01-31 16:02:00,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-01-31 16:02:00,108 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -6 predicate places. [2024-01-31 16:02:00,108 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 130 flow [2024-01-31 16:02:00,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 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) [2024-01-31 16:02:00,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:00,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:00,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:02:00,109 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err8ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-01-31 16:02:00,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:00,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1798379671, now seen corresponding path program 1 times [2024-01-31 16:02:00,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:00,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383678486] [2024-01-31 16:02:00,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:00,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:00,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:02:00,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:00,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383678486] [2024-01-31 16:02:00,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383678486] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:00,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:00,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:02:00,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962492343] [2024-01-31 16:02:00,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:00,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:00,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:00,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:00,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:00,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 61 [2024-01-31 16:02:00,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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) [2024-01-31 16:02:00,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:00,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 61 [2024-01-31 16:02:00,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:00,362 INFO L124 PetriNetUnfolderBase]: 245/632 cut-off events. [2024-01-31 16:02:00,362 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-01-31 16:02:00,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1184 conditions, 632 events. 245/632 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3720 event pairs, 19 based on Foata normal form. 0/599 useless extension candidates. Maximal degree in co-relation 1169. Up to 393 conditions per place. [2024-01-31 16:02:00,366 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 29 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2024-01-31 16:02:00,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 54 transitions, 200 flow [2024-01-31 16:02:00,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:00,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:00,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 150 transitions. [2024-01-31 16:02:00,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6147540983606558 [2024-01-31 16:02:00,370 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 130 flow. Second operand 4 states and 150 transitions. [2024-01-31 16:02:00,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 54 transitions, 200 flow [2024-01-31 16:02:00,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 54 transitions, 197 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:00,372 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 125 flow [2024-01-31 16:02:00,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=125, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2024-01-31 16:02:00,374 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -8 predicate places. [2024-01-31 16:02:00,374 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 125 flow [2024-01-31 16:02:00,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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) [2024-01-31 16:02:00,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:00,375 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:00,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 16:02:00,375 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err8ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-01-31 16:02:00,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:00,376 INFO L85 PathProgramCache]: Analyzing trace with hash -84813215, now seen corresponding path program 1 times [2024-01-31 16:02:00,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:00,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261437168] [2024-01-31 16:02:00,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:00,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:02:00,415 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:02:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:02:00,438 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:02:00,440 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:02:00,442 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (30 of 31 remaining) [2024-01-31 16:02:00,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 31 remaining) [2024-01-31 16:02:00,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 31 remaining) [2024-01-31 16:02:00,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 31 remaining) [2024-01-31 16:02:00,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 31 remaining) [2024-01-31 16:02:00,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 31 remaining) [2024-01-31 16:02:00,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 31 remaining) [2024-01-31 16:02:00,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 31 remaining) [2024-01-31 16:02:00,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 31 remaining) [2024-01-31 16:02:00,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 31 remaining) [2024-01-31 16:02:00,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 31 remaining) [2024-01-31 16:02:00,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 31 remaining) [2024-01-31 16:02:00,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 31 remaining) [2024-01-31 16:02:00,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (17 of 31 remaining) [2024-01-31 16:02:00,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 31 remaining) [2024-01-31 16:02:00,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 31 remaining) [2024-01-31 16:02:00,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 31 remaining) [2024-01-31 16:02:00,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 31 remaining) [2024-01-31 16:02:00,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 31 remaining) [2024-01-31 16:02:00,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 31 remaining) [2024-01-31 16:02:00,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 31 remaining) [2024-01-31 16:02:00,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 31 remaining) [2024-01-31 16:02:00,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 31 remaining) [2024-01-31 16:02:00,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 31 remaining) [2024-01-31 16:02:00,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 31 remaining) [2024-01-31 16:02:00,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 31 remaining) [2024-01-31 16:02:00,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 31 remaining) [2024-01-31 16:02:00,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 31 remaining) [2024-01-31 16:02:00,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 31 remaining) [2024-01-31 16:02:00,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (1 of 31 remaining) [2024-01-31 16:02:00,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 31 remaining) [2024-01-31 16:02:00,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:02:00,453 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-01-31 16:02:00,457 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:02:00,458 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-31 16:02:00,530 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:02:00,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 113 transitions, 246 flow [2024-01-31 16:02:00,546 INFO L124 PetriNetUnfolderBase]: 5/95 cut-off events. [2024-01-31 16:02:00,547 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:02:00,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 95 events. 5/95 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 245 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 102. Up to 3 conditions per place. [2024-01-31 16:02:00,550 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 113 transitions, 246 flow [2024-01-31 16:02:00,551 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 90 transitions, 193 flow [2024-01-31 16:02:00,554 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:02:00,556 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;@712911dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:02:00,556 INFO L358 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2024-01-31 16:02:00,558 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:02:00,558 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-31 16:02:00,558 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:02:00,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:00,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-31 16:02:00,559 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err8ASSERT_VIOLATIONWITNESS_INVARIANT (and 42 more)] === [2024-01-31 16:02:00,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:00,559 INFO L85 PathProgramCache]: Analyzing trace with hash 12288, now seen corresponding path program 1 times [2024-01-31 16:02:00,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:00,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017515612] [2024-01-31 16:02:00,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:00,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:02:00,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:00,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017515612] [2024-01-31 16:02:00,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017515612] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:00,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:00,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:02:00,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017870894] [2024-01-31 16:02:00,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:00,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:02:00,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:00,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:02:00,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:02:00,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 113 [2024-01-31 16:02:00,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 90 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2024-01-31 16:02:00,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:00,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 113 [2024-01-31 16:02:00,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:02,874 INFO L124 PetriNetUnfolderBase]: 16177/28880 cut-off events. [2024-01-31 16:02:02,875 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2024-01-31 16:02:02,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52929 conditions, 28880 events. 16177/28880 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 910. Compared 247631 event pairs, 11515 based on Foata normal form. 8271/35527 useless extension candidates. Maximal degree in co-relation 52916. Up to 19424 conditions per place. [2024-01-31 16:02:03,142 INFO L140 encePairwiseOnDemand]: 84/113 looper letters, 73 selfloop transitions, 15 changer transitions 0/119 dead transitions. [2024-01-31 16:02:03,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 119 transitions, 432 flow [2024-01-31 16:02:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:02:03,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:02:03,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2024-01-31 16:02:03,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7138643067846607 [2024-01-31 16:02:03,144 INFO L175 Difference]: Start difference. First operand has 93 places, 90 transitions, 193 flow. Second operand 3 states and 242 transitions. [2024-01-31 16:02:03,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 119 transitions, 432 flow [2024-01-31 16:02:03,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 119 transitions, 431 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:02:03,148 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 298 flow [2024-01-31 16:02:03,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2024-01-31 16:02:03,149 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -1 predicate places. [2024-01-31 16:02:03,149 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 298 flow [2024-01-31 16:02:03,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2024-01-31 16:02:03,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:03,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-31 16:02:03,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:02:03,150 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err8ASSERT_VIOLATIONWITNESS_INVARIANT (and 42 more)] === [2024-01-31 16:02:03,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:03,151 INFO L85 PathProgramCache]: Analyzing trace with hash 366589677, now seen corresponding path program 1 times [2024-01-31 16:02:03,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:03,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400514899] [2024-01-31 16:02:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:03,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:03,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:02:03,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:03,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400514899] [2024-01-31 16:02:03,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400514899] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:03,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:03,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:02:03,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865502568] [2024-01-31 16:02:03,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:03,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:03,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:03,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:03,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:03,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 113 [2024-01-31 16:02:03,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 298 flow. Second operand has 4 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 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) [2024-01-31 16:02:03,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:03,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 113 [2024-01-31 16:02:03,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:05,436 INFO L124 PetriNetUnfolderBase]: 13086/26061 cut-off events. [2024-01-31 16:02:05,437 INFO L125 PetriNetUnfolderBase]: For 6828/6900 co-relation queries the response was YES. [2024-01-31 16:02:05,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55136 conditions, 26061 events. 13086/26061 cut-off events. For 6828/6900 co-relation queries the response was YES. Maximal size of possible extension queue 852. Compared 243610 event pairs, 7032 based on Foata normal form. 2124/27397 useless extension candidates. Maximal degree in co-relation 55120. Up to 15606 conditions per place. [2024-01-31 16:02:05,795 INFO L140 encePairwiseOnDemand]: 109/113 looper letters, 78 selfloop transitions, 2 changer transitions 0/129 dead transitions. [2024-01-31 16:02:05,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 129 transitions, 576 flow [2024-01-31 16:02:05,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:05,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:05,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 314 transitions. [2024-01-31 16:02:05,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6946902654867256 [2024-01-31 16:02:05,798 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 298 flow. Second operand 4 states and 314 transitions. [2024-01-31 16:02:05,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 129 transitions, 576 flow [2024-01-31 16:02:05,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 129 transitions, 530 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:05,823 INFO L231 Difference]: Finished difference. Result has 91 places, 92 transitions, 268 flow [2024-01-31 16:02:05,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=91, PETRI_TRANSITIONS=92} [2024-01-31 16:02:05,824 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -2 predicate places. [2024-01-31 16:02:05,824 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 92 transitions, 268 flow [2024-01-31 16:02:05,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 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) [2024-01-31 16:02:05,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:05,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:05,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:02:05,825 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err8ASSERT_VIOLATIONWITNESS_INVARIANT (and 42 more)] === [2024-01-31 16:02:05,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:05,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1115748330, now seen corresponding path program 1 times [2024-01-31 16:02:05,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:05,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078028784] [2024-01-31 16:02:05,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:05,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:02:05,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:05,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078028784] [2024-01-31 16:02:05,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078028784] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:05,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:05,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:02:05,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549201922] [2024-01-31 16:02:05,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:05,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:05,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:05,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:05,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:05,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 113 [2024-01-31 16:02:05,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 268 flow. Second operand has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 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) [2024-01-31 16:02:05,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:05,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 113 [2024-01-31 16:02:05,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:07,660 INFO L124 PetriNetUnfolderBase]: 12152/22656 cut-off events. [2024-01-31 16:02:07,660 INFO L125 PetriNetUnfolderBase]: For 2286/2286 co-relation queries the response was YES. [2024-01-31 16:02:07,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45387 conditions, 22656 events. 12152/22656 cut-off events. For 2286/2286 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 202046 event pairs, 1478 based on Foata normal form. 0/21667 useless extension candidates. Maximal degree in co-relation 45371. Up to 15789 conditions per place. [2024-01-31 16:02:07,839 INFO L140 encePairwiseOnDemand]: 108/113 looper letters, 63 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2024-01-31 16:02:07,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 111 transitions, 449 flow [2024-01-31 16:02:07,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:07,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:07,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 300 transitions. [2024-01-31 16:02:07,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6637168141592921 [2024-01-31 16:02:07,842 INFO L175 Difference]: Start difference. First operand has 91 places, 92 transitions, 268 flow. Second operand 4 states and 300 transitions. [2024-01-31 16:02:07,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 111 transitions, 449 flow [2024-01-31 16:02:07,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 111 transitions, 446 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:07,845 INFO L231 Difference]: Finished difference. Result has 89 places, 89 transitions, 263 flow [2024-01-31 16:02:07,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=263, PETRI_PLACES=89, PETRI_TRANSITIONS=89} [2024-01-31 16:02:07,847 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -4 predicate places. [2024-01-31 16:02:07,847 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 89 transitions, 263 flow [2024-01-31 16:02:07,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 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) [2024-01-31 16:02:07,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:07,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:07,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:02:07,848 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err8ASSERT_VIOLATIONWITNESS_INVARIANT (and 42 more)] === [2024-01-31 16:02:07,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:07,849 INFO L85 PathProgramCache]: Analyzing trace with hash -341791912, now seen corresponding path program 1 times [2024-01-31 16:02:07,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:07,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868029912] [2024-01-31 16:02:07,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:07,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:02:07,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:07,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868029912] [2024-01-31 16:02:07,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868029912] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:07,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:07,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:02:07,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386334449] [2024-01-31 16:02:07,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:07,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:07,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:07,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:07,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:07,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 113 [2024-01-31 16:02:07,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 89 transitions, 263 flow. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 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) [2024-01-31 16:02:07,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:07,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 113 [2024-01-31 16:02:07,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:12,800 INFO L124 PetriNetUnfolderBase]: 41214/68828 cut-off events. [2024-01-31 16:02:12,800 INFO L125 PetriNetUnfolderBase]: For 8261/8330 co-relation queries the response was YES. [2024-01-31 16:02:12,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146598 conditions, 68828 events. 41214/68828 cut-off events. For 8261/8330 co-relation queries the response was YES. Maximal size of possible extension queue 1729. Compared 594140 event pairs, 13169 based on Foata normal form. 2166/69027 useless extension candidates. Maximal degree in co-relation 146583. Up to 26728 conditions per place. [2024-01-31 16:02:13,428 INFO L140 encePairwiseOnDemand]: 94/113 looper letters, 114 selfloop transitions, 23 changer transitions 0/158 dead transitions. [2024-01-31 16:02:13,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 158 transitions, 711 flow [2024-01-31 16:02:13,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:13,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:13,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 287 transitions. [2024-01-31 16:02:13,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349557522123894 [2024-01-31 16:02:13,430 INFO L175 Difference]: Start difference. First operand has 89 places, 89 transitions, 263 flow. Second operand 4 states and 287 transitions. [2024-01-31 16:02:13,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 158 transitions, 711 flow [2024-01-31 16:02:13,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 158 transitions, 706 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:13,435 INFO L231 Difference]: Finished difference. Result has 92 places, 97 transitions, 373 flow [2024-01-31 16:02:13,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=373, PETRI_PLACES=92, PETRI_TRANSITIONS=97} [2024-01-31 16:02:13,437 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -1 predicate places. [2024-01-31 16:02:13,439 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 97 transitions, 373 flow [2024-01-31 16:02:13,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 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) [2024-01-31 16:02:13,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:13,440 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:13,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 16:02:13,440 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err8ASSERT_VIOLATIONWITNESS_INVARIANT (and 42 more)] === [2024-01-31 16:02:13,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:13,441 INFO L85 PathProgramCache]: Analyzing trace with hash -541919768, now seen corresponding path program 1 times [2024-01-31 16:02:13,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:13,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102713309] [2024-01-31 16:02:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:13,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:02:13,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:13,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102713309] [2024-01-31 16:02:13,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102713309] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:13,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:13,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:02:13,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137044407] [2024-01-31 16:02:13,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:13,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:13,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:13,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:13,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:13,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 113 [2024-01-31 16:02:13,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 97 transitions, 373 flow. Second operand has 4 states, 4 states have (on average 61.5) internal successors, (246), 4 states have internal predecessors, (246), 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) [2024-01-31 16:02:13,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:13,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 113 [2024-01-31 16:02:13,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:16,297 INFO L124 PetriNetUnfolderBase]: 20076/38094 cut-off events. [2024-01-31 16:02:16,297 INFO L125 PetriNetUnfolderBase]: For 19286/20402 co-relation queries the response was YES. [2024-01-31 16:02:16,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87748 conditions, 38094 events. 20076/38094 cut-off events. For 19286/20402 co-relation queries the response was YES. Maximal size of possible extension queue 1269. Compared 364286 event pairs, 1925 based on Foata normal form. 0/35939 useless extension candidates. Maximal degree in co-relation 87730. Up to 25524 conditions per place. [2024-01-31 16:02:16,798 INFO L140 encePairwiseOnDemand]: 108/113 looper letters, 85 selfloop transitions, 2 changer transitions 0/134 dead transitions. [2024-01-31 16:02:16,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 134 transitions, 681 flow [2024-01-31 16:02:16,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:16,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:16,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 314 transitions. [2024-01-31 16:02:16,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6946902654867256 [2024-01-31 16:02:16,804 INFO L175 Difference]: Start difference. First operand has 92 places, 97 transitions, 373 flow. Second operand 4 states and 314 transitions. [2024-01-31 16:02:16,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 134 transitions, 681 flow [2024-01-31 16:02:16,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 134 transitions, 650 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:02:16,817 INFO L231 Difference]: Finished difference. Result has 91 places, 94 transitions, 352 flow [2024-01-31 16:02:16,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=352, PETRI_PLACES=91, PETRI_TRANSITIONS=94} [2024-01-31 16:02:16,819 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -2 predicate places. [2024-01-31 16:02:16,820 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 94 transitions, 352 flow [2024-01-31 16:02:16,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.5) internal successors, (246), 4 states have internal predecessors, (246), 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) [2024-01-31 16:02:16,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:16,820 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:16,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 16:02:16,820 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err8ASSERT_VIOLATIONWITNESS_INVARIANT (and 42 more)] === [2024-01-31 16:02:16,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:16,821 INFO L85 PathProgramCache]: Analyzing trace with hash 380348371, now seen corresponding path program 1 times [2024-01-31 16:02:16,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:16,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135010885] [2024-01-31 16:02:16,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:16,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:02:16,833 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:02:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:02:16,846 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:02:16,847 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:02:16,847 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (44 of 45 remaining) [2024-01-31 16:02:16,847 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (43 of 45 remaining) [2024-01-31 16:02:16,848 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (42 of 45 remaining) [2024-01-31 16:02:16,848 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8ASSERT_VIOLATIONWITNESS_INVARIANT (41 of 45 remaining) [2024-01-31 16:02:16,848 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (40 of 45 remaining) [2024-01-31 16:02:16,848 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (39 of 45 remaining) [2024-01-31 16:02:16,848 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (38 of 45 remaining) [2024-01-31 16:02:16,848 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (37 of 45 remaining) [2024-01-31 16:02:16,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (36 of 45 remaining) [2024-01-31 16:02:16,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 45 remaining) [2024-01-31 16:02:16,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 45 remaining) [2024-01-31 16:02:16,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (33 of 45 remaining) [2024-01-31 16:02:16,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 45 remaining) [2024-01-31 16:02:16,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (31 of 45 remaining) [2024-01-31 16:02:16,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 45 remaining) [2024-01-31 16:02:16,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 45 remaining) [2024-01-31 16:02:16,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (28 of 45 remaining) [2024-01-31 16:02:16,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 45 remaining) [2024-01-31 16:02:16,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 45 remaining) [2024-01-31 16:02:16,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 45 remaining) [2024-01-31 16:02:16,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 45 remaining) [2024-01-31 16:02:16,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 45 remaining) [2024-01-31 16:02:16,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 45 remaining) [2024-01-31 16:02:16,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 45 remaining) [2024-01-31 16:02:16,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 45 remaining) [2024-01-31 16:02:16,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 45 remaining) [2024-01-31 16:02:16,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 45 remaining) [2024-01-31 16:02:16,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 45 remaining) [2024-01-31 16:02:16,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 45 remaining) [2024-01-31 16:02:16,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 45 remaining) [2024-01-31 16:02:16,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 45 remaining) [2024-01-31 16:02:16,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 45 remaining) [2024-01-31 16:02:16,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 45 remaining) [2024-01-31 16:02:16,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 45 remaining) [2024-01-31 16:02:16,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 45 remaining) [2024-01-31 16:02:16,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 45 remaining) [2024-01-31 16:02:16,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 45 remaining) [2024-01-31 16:02:16,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 45 remaining) [2024-01-31 16:02:16,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (6 of 45 remaining) [2024-01-31 16:02:16,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 45 remaining) [2024-01-31 16:02:16,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 45 remaining) [2024-01-31 16:02:16,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 45 remaining) [2024-01-31 16:02:16,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 45 remaining) [2024-01-31 16:02:16,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (1 of 45 remaining) [2024-01-31 16:02:16,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 45 remaining) [2024-01-31 16:02:16,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-31 16:02:16,854 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-01-31 16:02:16,855 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:02:16,855 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-31 16:02:16,898 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:02:16,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 165 transitions, 366 flow [2024-01-31 16:02:16,917 INFO L124 PetriNetUnfolderBase]: 6/128 cut-off events. [2024-01-31 16:02:16,918 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-31 16:02:16,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 128 events. 6/128 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 421 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 139. Up to 4 conditions per place. [2024-01-31 16:02:16,918 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 165 transitions, 366 flow [2024-01-31 16:02:16,921 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 120 transitions, 261 flow [2024-01-31 16:02:16,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:02:16,922 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;@712911dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:02:16,922 INFO L358 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-01-31 16:02:16,922 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:02:16,922 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-31 16:02:16,923 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:02:16,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:16,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-31 16:02:16,923 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err8ASSERT_VIOLATIONWITNESS_INVARIANT (and 56 more)] === [2024-01-31 16:02:16,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:16,923 INFO L85 PathProgramCache]: Analyzing trace with hash 17568, now seen corresponding path program 1 times [2024-01-31 16:02:16,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:16,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930135127] [2024-01-31 16:02:16,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:16,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:02:16,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:16,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930135127] [2024-01-31 16:02:16,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930135127] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:16,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:16,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:02:16,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495708289] [2024-01-31 16:02:16,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:16,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:02:16,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:16,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:02:16,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:02:16,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 165 [2024-01-31 16:02:16,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 120 transitions, 261 flow. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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) [2024-01-31 16:02:16,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:16,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 165 [2024-01-31 16:02:16,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand