./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/lazy01.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/lazy01.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 13967880 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/lazy01.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/lazy01.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-1396788-m [2024-02-02 16:16:05,194 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-02 16:16:05,285 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-02 16:16:05,290 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-02 16:16:05,291 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-02 16:16:05,320 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-02 16:16:05,321 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-02 16:16:05,321 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-02 16:16:05,322 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-02 16:16:05,326 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-02 16:16:05,326 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-02 16:16:05,326 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-02 16:16:05,327 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-02 16:16:05,328 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-02 16:16:05,329 INFO L153 SettingsManager]: * Use SBE=true [2024-02-02 16:16:05,329 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-02 16:16:05,329 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-02 16:16:05,329 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-02 16:16:05,330 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-02 16:16:05,330 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-02 16:16:05,330 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-02 16:16:05,331 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-02 16:16:05,331 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-02 16:16:05,331 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-02 16:16:05,332 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-02 16:16:05,332 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-02 16:16:05,332 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-02 16:16:05,332 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-02 16:16:05,333 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-02 16:16:05,333 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-02 16:16:05,334 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-02 16:16:05,334 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-02 16:16:05,335 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 16:16:05,335 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-02 16:16:05,335 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-02 16:16:05,335 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-02 16:16:05,336 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-02 16:16:05,336 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-02 16:16:05,336 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-02 16:16:05,336 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-02 16:16:05,336 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-02 16:16:05,337 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-02 16:16:05,337 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-02 16:16:05,337 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-02 16:16:05,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-02 16:16:05,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-02 16:16:05,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-02 16:16:05,650 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-02 16:16:05,651 INFO L274 PluginConnector]: CDTParser initialized [2024-02-02 16:16:05,652 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/lazy01.i [2024-02-02 16:16:06,802 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-02 16:16:07,028 INFO L384 CDTParser]: Found 1 translation units. [2024-02-02 16:16:07,028 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/lazy01.i [2024-02-02 16:16:07,043 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33dbbc7b4/30cbb0e2963d4aa5ba7e070fc8d85611/FLAGd1e11515b [2024-02-02 16:16:07,054 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33dbbc7b4/30cbb0e2963d4aa5ba7e070fc8d85611 [2024-02-02 16:16:07,057 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-02 16:16:07,057 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-02 16:16:07,058 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/lazy01.yml/witness.yml [2024-02-02 16:16:07,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-02 16:16:07,150 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-02 16:16:07,151 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-02 16:16:07,151 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-02 16:16:07,160 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-02 16:16:07,160 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 04:16:07" (1/2) ... [2024-02-02 16:16:07,161 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eb4a563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:16:07, skipping insertion in model container [2024-02-02 16:16:07,162 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 04:16:07" (1/2) ... [2024-02-02 16:16:07,173 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@16599ed3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:16:07, skipping insertion in model container [2024-02-02 16:16:07,173 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 04:16:07" (2/2) ... [2024-02-02 16:16:07,174 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eb4a563 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:16:07, skipping insertion in model container [2024-02-02 16:16:07,174 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 04:16:07" (2/2) ... [2024-02-02 16:16:07,174 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-02 16:16:07,233 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-02 16:16:07,235 INFO L101 nessWitnessExtractor]: Location invariant before [L714-L714] (0 <= data) && ((unsigned long )arg == 0UL) [2024-02-02 16:16:07,235 INFO L101 nessWitnessExtractor]: Location invariant before [L713-L713] (unsigned long )arg == 0UL [2024-02-02 16:16:07,235 INFO L101 nessWitnessExtractor]: Location invariant before [L709-L709] (unsigned long )arg == 0UL [2024-02-02 16:16:07,235 INFO L101 nessWitnessExtractor]: Location invariant before [L725-L725] ((0 <= data) && (data <= 2)) && ((unsigned long )arg == 0UL) [2024-02-02 16:16:07,235 INFO L101 nessWitnessExtractor]: Location invariant before [L720-L720] (unsigned long )arg == 0UL [2024-02-02 16:16:07,236 INFO L101 nessWitnessExtractor]: Location invariant before [L726-L726] (unsigned long )arg == 0UL [2024-02-02 16:16:07,236 INFO L101 nessWitnessExtractor]: Location invariant before [L722-L722] ((3 <= data) && ((unsigned long )arg == 0UL)) && (data != 0) [2024-02-02 16:16:07,237 INFO L101 nessWitnessExtractor]: Location invariant before [L706-L706] (unsigned long )arg == 0UL [2024-02-02 16:16:07,237 INFO L101 nessWitnessExtractor]: Location invariant before [L708-L708] (1 <= data) && ((unsigned long )arg == 0UL) [2024-02-02 16:16:07,237 INFO L101 nessWitnessExtractor]: Location invariant before [L732-L732] data == 0 [2024-02-02 16:16:07,237 INFO L101 nessWitnessExtractor]: Location invariant before [L716-L716] (unsigned long )arg == 0UL [2024-02-02 16:16:07,237 INFO L101 nessWitnessExtractor]: Location invariant before [L715-L715] (2 <= data) && ((unsigned long )arg == 0UL) [2024-02-02 16:16:07,237 INFO L101 nessWitnessExtractor]: Location invariant before [L721-L721] (0 <= data) && ((unsigned long )arg == 0UL) [2024-02-02 16:16:07,238 INFO L101 nessWitnessExtractor]: Location invariant after [L722-L722] ((3 <= data) && ((unsigned long )arg == 0UL)) && (data != 0) [2024-02-02 16:16:07,238 INFO L101 nessWitnessExtractor]: Location invariant before [L730-L730] data == 0 [2024-02-02 16:16:07,238 INFO L101 nessWitnessExtractor]: Location invariant before [L707-L707] (0 <= data) && ((unsigned long )arg == 0UL) [2024-02-02 16:16:07,286 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-02-02 16:16:07,620 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/lazy01.i[31042,31055] [2024-02-02 16:16:07,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 16:16:07,640 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 Start Parsing Local [2024-02-02 16:16:07,727 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/lazy01.i[31042,31055] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-02 16:16:07,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 16:16:07,776 INFO L208 MainTranslator]: Completed translation [2024-02-02 16:16:07,776 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:16:07 WrapperNode [2024-02-02 16:16:07,777 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-02 16:16:07,778 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-02 16:16:07,778 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-02 16:16:07,778 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-02 16:16:07,785 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 02.02 04:16:07" (1/1) ... [2024-02-02 16:16:07,807 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 02.02 04:16:07" (1/1) ... [2024-02-02 16:16:07,826 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 63 [2024-02-02 16:16:07,827 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-02 16:16:07,828 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-02 16:16:07,828 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-02 16:16:07,828 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-02 16:16:07,838 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:16:07" (1/1) ... [2024-02-02 16:16:07,839 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:16:07" (1/1) ... [2024-02-02 16:16:07,855 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:16:07" (1/1) ... [2024-02-02 16:16:07,874 INFO L175 MemorySlicer]: Split 13 memory accesses to 5 slices as follows [2, 5, 2, 2, 2]. 38 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0, 0]. The 3 writes are split as follows [0, 0, 1, 1, 1]. [2024-02-02 16:16:07,875 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:16:07" (1/1) ... [2024-02-02 16:16:07,875 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:16:07" (1/1) ... [2024-02-02 16:16:07,886 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:16:07" (1/1) ... [2024-02-02 16:16:07,889 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:16:07" (1/1) ... [2024-02-02 16:16:07,893 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:16:07" (1/1) ... [2024-02-02 16:16:07,897 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:16:07" (1/1) ... [2024-02-02 16:16:07,911 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-02 16:16:07,912 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-02 16:16:07,912 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-02 16:16:07,914 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-02 16:16:07,915 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:16:07" (1/1) ... [2024-02-02 16:16:07,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 16:16:07,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 16:16:07,951 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) [2024-02-02 16:16:07,970 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 [2024-02-02 16:16:07,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-02 16:16:07,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-02 16:16:07,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-02 16:16:07,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-02 16:16:07,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-02 16:16:07,997 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-02 16:16:07,997 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-02 16:16:07,997 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-02 16:16:07,997 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-02 16:16:07,997 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-02 16:16:07,997 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-02 16:16:07,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-02 16:16:07,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-02 16:16:07,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-02 16:16:07,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-02 16:16:07,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-02 16:16:07,998 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-02 16:16:07,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-02 16:16:07,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-02 16:16:07,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-02 16:16:07,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-02 16:16:07,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-02 16:16:07,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-02 16:16:08,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-02 16:16:08,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-02 16:16:08,000 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-02 16:16:08,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-02 16:16:08,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-02 16:16:08,002 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-02 16:16:08,131 INFO L244 CfgBuilder]: Building ICFG [2024-02-02 16:16:08,134 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-02 16:16:08,429 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-02 16:16:08,429 INFO L293 CfgBuilder]: Performing block encoding [2024-02-02 16:16:08,547 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-02 16:16:08,552 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-02-02 16:16:08,554 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 04:16:08 BoogieIcfgContainer [2024-02-02 16:16:08,554 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-02 16:16:08,557 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-02 16:16:08,558 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-02 16:16:08,561 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-02 16:16:08,561 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 04:16:07" (1/4) ... [2024-02-02 16:16:08,562 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2d40a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 04:16:08, skipping insertion in model container [2024-02-02 16:16:08,562 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 04:16:07" (2/4) ... [2024-02-02 16:16:08,563 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2d40a5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 02.02 04:16:08, skipping insertion in model container [2024-02-02 16:16:08,563 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:16:07" (3/4) ... [2024-02-02 16:16:08,563 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2d40a5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 02.02 04:16:08, skipping insertion in model container [2024-02-02 16:16:08,564 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 04:16:08" (4/4) ... [2024-02-02 16:16:08,565 INFO L112 eAbstractionObserver]: Analyzing ICFG lazy01.i [2024-02-02 16:16:08,583 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-02 16:16:08,584 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-02-02 16:16:08,584 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-02 16:16:08,679 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-02-02 16:16:08,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 65 transitions, 151 flow [2024-02-02 16:16:08,763 INFO L124 PetriNetUnfolderBase]: 1/62 cut-off events. [2024-02-02 16:16:08,763 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-02 16:16:08,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 62 events. 1/62 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 150 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2024-02-02 16:16:08,768 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 65 transitions, 151 flow [2024-02-02 16:16:08,771 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 60 transitions, 135 flow [2024-02-02 16:16:08,786 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-02 16:16:08,794 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;@44608958, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-02 16:16:08,794 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-02-02 16:16:08,799 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-02 16:16:08,799 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-02 16:16:08,799 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 16:16:08,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:08,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-02 16:16:08,801 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-02 16:16:08,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:08,805 INFO L85 PathProgramCache]: Analyzing trace with hash 8284, now seen corresponding path program 1 times [2024-02-02 16:16:08,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:08,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797690774] [2024-02-02 16:16:08,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:08,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:09,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:09,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797690774] [2024-02-02 16:16:09,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797690774] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:09,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:09,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-02 16:16:09,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098299369] [2024-02-02 16:16:09,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:09,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 16:16:09,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:09,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 16:16:09,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 16:16:09,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 65 [2024-02-02 16:16:09,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 60 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2024-02-02 16:16:09,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:09,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 65 [2024-02-02 16:16:09,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:09,665 INFO L124 PetriNetUnfolderBase]: 1085/2103 cut-off events. [2024-02-02 16:16:09,666 INFO L125 PetriNetUnfolderBase]: For 134/134 co-relation queries the response was YES. [2024-02-02 16:16:09,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3908 conditions, 2103 events. 1085/2103 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14200 event pairs, 407 based on Foata normal form. 82/2132 useless extension candidates. Maximal degree in co-relation 3417. Up to 1575 conditions per place. [2024-02-02 16:16:09,687 INFO L140 encePairwiseOnDemand]: 58/65 looper letters, 37 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2024-02-02 16:16:09,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 69 transitions, 239 flow [2024-02-02 16:16:09,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 16:16:09,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 16:16:09,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2024-02-02 16:16:09,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.717948717948718 [2024-02-02 16:16:09,702 INFO L175 Difference]: Start difference. First operand has 69 places, 60 transitions, 135 flow. Second operand 3 states and 140 transitions. [2024-02-02 16:16:09,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 69 transitions, 239 flow [2024-02-02 16:16:09,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 69 transitions, 227 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-02-02 16:16:09,712 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 139 flow [2024-02-02 16:16:09,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-02-02 16:16:09,718 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -4 predicate places. [2024-02-02 16:16:09,718 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 139 flow [2024-02-02 16:16:09,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2024-02-02 16:16:09,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:09,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-02 16:16:09,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-02 16:16:09,720 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-02 16:16:09,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:09,720 INFO L85 PathProgramCache]: Analyzing trace with hash -931074202, now seen corresponding path program 1 times [2024-02-02 16:16:09,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:09,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435179750] [2024-02-02 16:16:09,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:09,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:09,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:09,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435179750] [2024-02-02 16:16:09,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435179750] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:09,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:09,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:16:09,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271193675] [2024-02-02 16:16:09,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:09,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:16:09,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:09,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:16:09,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:16:09,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 65 [2024-02-02 16:16:09,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 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) [2024-02-02 16:16:09,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:09,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 65 [2024-02-02 16:16:09,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:10,177 INFO L124 PetriNetUnfolderBase]: 654/1511 cut-off events. [2024-02-02 16:16:10,178 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2024-02-02 16:16:10,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2819 conditions, 1511 events. 654/1511 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10802 event pairs, 144 based on Foata normal form. 52/1424 useless extension candidates. Maximal degree in co-relation 1195. Up to 931 conditions per place. [2024-02-02 16:16:10,190 INFO L140 encePairwiseOnDemand]: 61/65 looper letters, 37 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2024-02-02 16:16:10,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 69 transitions, 243 flow [2024-02-02 16:16:10,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:16:10,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:16:10,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 179 transitions. [2024-02-02 16:16:10,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6884615384615385 [2024-02-02 16:16:10,197 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 139 flow. Second operand 4 states and 179 transitions. [2024-02-02 16:16:10,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 69 transitions, 243 flow [2024-02-02 16:16:10,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 69 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 16:16:10,200 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 136 flow [2024-02-02 16:16:10,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2024-02-02 16:16:10,201 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -4 predicate places. [2024-02-02 16:16:10,202 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 136 flow [2024-02-02 16:16:10,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 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) [2024-02-02 16:16:10,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:10,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:10,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-02 16:16:10,203 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-02 16:16:10,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:10,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1410395163, now seen corresponding path program 1 times [2024-02-02 16:16:10,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:10,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008440821] [2024-02-02 16:16:10,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:10,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:10,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:10,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008440821] [2024-02-02 16:16:10,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008440821] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:10,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:10,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:16:10,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247833428] [2024-02-02 16:16:10,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:10,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:16:10,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:10,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:16:10,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:16:10,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 65 [2024-02-02 16:16:10,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 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) [2024-02-02 16:16:10,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:10,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 65 [2024-02-02 16:16:10,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:10,576 INFO L124 PetriNetUnfolderBase]: 665/1530 cut-off events. [2024-02-02 16:16:10,576 INFO L125 PetriNetUnfolderBase]: For 146/146 co-relation queries the response was YES. [2024-02-02 16:16:10,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2804 conditions, 1530 events. 665/1530 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10822 event pairs, 141 based on Foata normal form. 58/1444 useless extension candidates. Maximal degree in co-relation 2787. Up to 916 conditions per place. [2024-02-02 16:16:10,589 INFO L140 encePairwiseOnDemand]: 61/65 looper letters, 41 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2024-02-02 16:16:10,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 71 transitions, 257 flow [2024-02-02 16:16:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:16:10,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:16:10,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 183 transitions. [2024-02-02 16:16:10,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7038461538461539 [2024-02-02 16:16:10,591 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 136 flow. Second operand 4 states and 183 transitions. [2024-02-02 16:16:10,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 71 transitions, 257 flow [2024-02-02 16:16:10,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 71 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 16:16:10,593 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 133 flow [2024-02-02 16:16:10,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=133, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2024-02-02 16:16:10,594 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -5 predicate places. [2024-02-02 16:16:10,594 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 133 flow [2024-02-02 16:16:10,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 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) [2024-02-02 16:16:10,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:10,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:10,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-02 16:16:10,595 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-02 16:16:10,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:10,596 INFO L85 PathProgramCache]: Analyzing trace with hash -732458266, now seen corresponding path program 1 times [2024-02-02 16:16:10,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:10,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687448874] [2024-02-02 16:16:10,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:10,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:10,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:10,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:10,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687448874] [2024-02-02 16:16:10,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687448874] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:10,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:10,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-02 16:16:10,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53709203] [2024-02-02 16:16:10,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:10,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:16:10,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:10,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:16:10,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:16:10,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 65 [2024-02-02 16:16:10,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2024-02-02 16:16:10,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:10,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 65 [2024-02-02 16:16:10,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:11,021 INFO L124 PetriNetUnfolderBase]: 1519/2774 cut-off events. [2024-02-02 16:16:11,021 INFO L125 PetriNetUnfolderBase]: For 269/276 co-relation queries the response was YES. [2024-02-02 16:16:11,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5586 conditions, 2774 events. 1519/2774 cut-off events. For 269/276 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18521 event pairs, 489 based on Foata normal form. 25/2746 useless extension candidates. Maximal degree in co-relation 4895. Up to 2105 conditions per place. [2024-02-02 16:16:11,044 INFO L140 encePairwiseOnDemand]: 60/65 looper letters, 50 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2024-02-02 16:16:11,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 77 transitions, 300 flow [2024-02-02 16:16:11,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:16:11,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:16:11,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 164 transitions. [2024-02-02 16:16:11,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-02-02 16:16:11,047 INFO L175 Difference]: Start difference. First operand has 64 places, 55 transitions, 133 flow. Second operand 4 states and 164 transitions. [2024-02-02 16:16:11,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 77 transitions, 300 flow [2024-02-02 16:16:11,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 293 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 16:16:11,051 INFO L231 Difference]: Finished difference. Result has 67 places, 57 transitions, 156 flow [2024-02-02 16:16:11,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=67, PETRI_TRANSITIONS=57} [2024-02-02 16:16:11,052 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -2 predicate places. [2024-02-02 16:16:11,053 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 57 transitions, 156 flow [2024-02-02 16:16:11,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2024-02-02 16:16:11,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:11,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:11,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-02 16:16:11,054 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-02 16:16:11,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:11,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1818285662, now seen corresponding path program 1 times [2024-02-02 16:16:11,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:11,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376287366] [2024-02-02 16:16:11,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:11,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:11,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:11,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:11,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376287366] [2024-02-02 16:16:11,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376287366] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:11,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:11,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:16:11,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616898894] [2024-02-02 16:16:11,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:11,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:16:11,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:11,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:16:11,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:16:11,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 65 [2024-02-02 16:16:11,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 57 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 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) [2024-02-02 16:16:11,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:11,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 65 [2024-02-02 16:16:11,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:11,413 INFO L124 PetriNetUnfolderBase]: 714/2010 cut-off events. [2024-02-02 16:16:11,413 INFO L125 PetriNetUnfolderBase]: For 308/308 co-relation queries the response was YES. [2024-02-02 16:16:11,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3556 conditions, 2010 events. 714/2010 cut-off events. For 308/308 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 16411 event pairs, 92 based on Foata normal form. 68/1835 useless extension candidates. Maximal degree in co-relation 3537. Up to 822 conditions per place. [2024-02-02 16:16:11,430 INFO L140 encePairwiseOnDemand]: 61/65 looper letters, 53 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2024-02-02 16:16:11,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 82 transitions, 356 flow [2024-02-02 16:16:11,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:16:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:16:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 188 transitions. [2024-02-02 16:16:11,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7230769230769231 [2024-02-02 16:16:11,432 INFO L175 Difference]: Start difference. First operand has 67 places, 57 transitions, 156 flow. Second operand 4 states and 188 transitions. [2024-02-02 16:16:11,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 82 transitions, 356 flow [2024-02-02 16:16:11,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 82 transitions, 336 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 16:16:11,437 INFO L231 Difference]: Finished difference. Result has 66 places, 55 transitions, 148 flow [2024-02-02 16:16:11,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2024-02-02 16:16:11,440 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -3 predicate places. [2024-02-02 16:16:11,440 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 148 flow [2024-02-02 16:16:11,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 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) [2024-02-02 16:16:11,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:11,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:11,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-02 16:16:11,441 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-02 16:16:11,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:11,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1231369463, now seen corresponding path program 1 times [2024-02-02 16:16:11,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:11,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222759843] [2024-02-02 16:16:11,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:11,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:11,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:11,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222759843] [2024-02-02 16:16:11,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222759843] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:11,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:11,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:16:11,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403262155] [2024-02-02 16:16:11,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:11,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-02 16:16:11,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:11,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-02 16:16:11,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-02 16:16:11,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 65 [2024-02-02 16:16:11,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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) [2024-02-02 16:16:11,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:11,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 65 [2024-02-02 16:16:11,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:11,964 INFO L124 PetriNetUnfolderBase]: 1747/3159 cut-off events. [2024-02-02 16:16:11,965 INFO L125 PetriNetUnfolderBase]: For 587/597 co-relation queries the response was YES. [2024-02-02 16:16:11,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6675 conditions, 3159 events. 1747/3159 cut-off events. For 587/597 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21436 event pairs, 605 based on Foata normal form. 61/3155 useless extension candidates. Maximal degree in co-relation 5967. Up to 1630 conditions per place. [2024-02-02 16:16:11,991 INFO L140 encePairwiseOnDemand]: 59/65 looper letters, 62 selfloop transitions, 6 changer transitions 0/87 dead transitions. [2024-02-02 16:16:11,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 367 flow [2024-02-02 16:16:11,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 16:16:11,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 16:16:11,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 200 transitions. [2024-02-02 16:16:11,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-02-02 16:16:11,993 INFO L175 Difference]: Start difference. First operand has 66 places, 55 transitions, 148 flow. Second operand 5 states and 200 transitions. [2024-02-02 16:16:11,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 367 flow [2024-02-02 16:16:11,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 87 transitions, 358 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 16:16:11,996 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 169 flow [2024-02-02 16:16:11,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=169, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2024-02-02 16:16:11,997 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 0 predicate places. [2024-02-02 16:16:11,997 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 169 flow [2024-02-02 16:16:11,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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) [2024-02-02 16:16:11,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:11,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:11,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-02 16:16:11,998 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-02 16:16:11,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:11,998 INFO L85 PathProgramCache]: Analyzing trace with hash 583064692, now seen corresponding path program 1 times [2024-02-02 16:16:11,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:11,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170142327] [2024-02-02 16:16:11,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:11,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:12,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:12,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170142327] [2024-02-02 16:16:12,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170142327] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:12,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:12,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-02 16:16:12,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328349375] [2024-02-02 16:16:12,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:12,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:16:12,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:12,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:16:12,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:16:12,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 65 [2024-02-02 16:16:12,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:16:12,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:12,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 65 [2024-02-02 16:16:12,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:12,464 INFO L124 PetriNetUnfolderBase]: 1819/3216 cut-off events. [2024-02-02 16:16:12,465 INFO L125 PetriNetUnfolderBase]: For 1101/1144 co-relation queries the response was YES. [2024-02-02 16:16:12,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6929 conditions, 3216 events. 1819/3216 cut-off events. For 1101/1144 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21671 event pairs, 571 based on Foata normal form. 23/3183 useless extension candidates. Maximal degree in co-relation 6908. Up to 2557 conditions per place. [2024-02-02 16:16:12,498 INFO L140 encePairwiseOnDemand]: 60/65 looper letters, 49 selfloop transitions, 6 changer transitions 0/75 dead transitions. [2024-02-02 16:16:12,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 75 transitions, 331 flow [2024-02-02 16:16:12,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:16:12,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:16:12,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 162 transitions. [2024-02-02 16:16:12,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6230769230769231 [2024-02-02 16:16:12,499 INFO L175 Difference]: Start difference. First operand has 69 places, 55 transitions, 169 flow. Second operand 4 states and 162 transitions. [2024-02-02 16:16:12,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 75 transitions, 331 flow [2024-02-02 16:16:12,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 75 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 16:16:12,504 INFO L231 Difference]: Finished difference. Result has 72 places, 57 transitions, 195 flow [2024-02-02 16:16:12,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=195, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2024-02-02 16:16:12,506 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 3 predicate places. [2024-02-02 16:16:12,506 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 195 flow [2024-02-02 16:16:12,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:16:12,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:12,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:12,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-02 16:16:12,507 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-02 16:16:12,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:12,508 INFO L85 PathProgramCache]: Analyzing trace with hash 895136584, now seen corresponding path program 1 times [2024-02-02 16:16:12,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:12,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826173974] [2024-02-02 16:16:12,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:12,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:12,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:12,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826173974] [2024-02-02 16:16:12,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826173974] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:12,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:12,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:16:12,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852871988] [2024-02-02 16:16:12,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:12,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-02 16:16:12,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:12,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-02 16:16:12,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-02 16:16:12,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 65 [2024-02-02 16:16:12,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 57 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 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) [2024-02-02 16:16:12,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:12,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 65 [2024-02-02 16:16:12,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:12,996 INFO L124 PetriNetUnfolderBase]: 1819/3148 cut-off events. [2024-02-02 16:16:12,996 INFO L125 PetriNetUnfolderBase]: For 1245/1288 co-relation queries the response was YES. [2024-02-02 16:16:13,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7183 conditions, 3148 events. 1819/3148 cut-off events. For 1245/1288 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20683 event pairs, 341 based on Foata normal form. 3/3096 useless extension candidates. Maximal degree in co-relation 7159. Up to 1548 conditions per place. [2024-02-02 16:16:13,018 INFO L140 encePairwiseOnDemand]: 60/65 looper letters, 61 selfloop transitions, 7 changer transitions 0/87 dead transitions. [2024-02-02 16:16:13,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 87 transitions, 402 flow [2024-02-02 16:16:13,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 16:16:13,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 16:16:13,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 197 transitions. [2024-02-02 16:16:13,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6061538461538462 [2024-02-02 16:16:13,020 INFO L175 Difference]: Start difference. First operand has 72 places, 57 transitions, 195 flow. Second operand 5 states and 197 transitions. [2024-02-02 16:16:13,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 87 transitions, 402 flow [2024-02-02 16:16:13,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 87 transitions, 397 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 16:16:13,025 INFO L231 Difference]: Finished difference. Result has 74 places, 56 transitions, 202 flow [2024-02-02 16:16:13,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=74, PETRI_TRANSITIONS=56} [2024-02-02 16:16:13,025 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 5 predicate places. [2024-02-02 16:16:13,026 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 56 transitions, 202 flow [2024-02-02 16:16:13,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 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) [2024-02-02 16:16:13,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:13,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:13,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-02 16:16:13,026 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-02 16:16:13,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:13,027 INFO L85 PathProgramCache]: Analyzing trace with hash 420941256, now seen corresponding path program 1 times [2024-02-02 16:16:13,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:13,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668427435] [2024-02-02 16:16:13,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:13,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:13,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:13,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668427435] [2024-02-02 16:16:13,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668427435] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:13,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:13,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-02 16:16:13,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924530544] [2024-02-02 16:16:13,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:13,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:16:13,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:13,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:16:13,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:16:13,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 65 [2024-02-02 16:16:13,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 56 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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) [2024-02-02 16:16:13,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:13,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 65 [2024-02-02 16:16:13,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:13,510 INFO L124 PetriNetUnfolderBase]: 2751/4676 cut-off events. [2024-02-02 16:16:13,511 INFO L125 PetriNetUnfolderBase]: For 2489/2555 co-relation queries the response was YES. [2024-02-02 16:16:13,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10592 conditions, 4676 events. 2751/4676 cut-off events. For 2489/2555 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 30246 event pairs, 925 based on Foata normal form. 0/4436 useless extension candidates. Maximal degree in co-relation 10567. Up to 3991 conditions per place. [2024-02-02 16:16:13,548 INFO L140 encePairwiseOnDemand]: 59/65 looper letters, 50 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2024-02-02 16:16:13,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 77 transitions, 404 flow [2024-02-02 16:16:13,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:16:13,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:16:13,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2024-02-02 16:16:13,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884615384615385 [2024-02-02 16:16:13,550 INFO L175 Difference]: Start difference. First operand has 74 places, 56 transitions, 202 flow. Second operand 4 states and 153 transitions. [2024-02-02 16:16:13,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 77 transitions, 404 flow [2024-02-02 16:16:13,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 77 transitions, 393 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 16:16:13,554 INFO L231 Difference]: Finished difference. Result has 77 places, 61 transitions, 274 flow [2024-02-02 16:16:13,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=274, PETRI_PLACES=77, PETRI_TRANSITIONS=61} [2024-02-02 16:16:13,555 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 8 predicate places. [2024-02-02 16:16:13,555 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 61 transitions, 274 flow [2024-02-02 16:16:13,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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) [2024-02-02 16:16:13,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:13,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:13,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-02 16:16:13,556 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-02 16:16:13,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:13,556 INFO L85 PathProgramCache]: Analyzing trace with hash -319325742, now seen corresponding path program 1 times [2024-02-02 16:16:13,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:13,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026608291] [2024-02-02 16:16:13,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:13,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:13,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:13,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026608291] [2024-02-02 16:16:13,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026608291] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:13,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:13,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:16:13,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941632727] [2024-02-02 16:16:13,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:13,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 16:16:13,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:13,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 16:16:13,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 16:16:13,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 65 [2024-02-02 16:16:13,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 61 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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) [2024-02-02 16:16:13,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:13,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 65 [2024-02-02 16:16:13,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:13,796 INFO L124 PetriNetUnfolderBase]: 484/1508 cut-off events. [2024-02-02 16:16:13,797 INFO L125 PetriNetUnfolderBase]: For 728/728 co-relation queries the response was YES. [2024-02-02 16:16:13,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3107 conditions, 1508 events. 484/1508 cut-off events. For 728/728 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 11608 event pairs, 176 based on Foata normal form. 100/1554 useless extension candidates. Maximal degree in co-relation 3079. Up to 472 conditions per place. [2024-02-02 16:16:13,807 INFO L140 encePairwiseOnDemand]: 59/65 looper letters, 39 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2024-02-02 16:16:13,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 393 flow [2024-02-02 16:16:13,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 16:16:13,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 16:16:13,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 153 transitions. [2024-02-02 16:16:13,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7846153846153846 [2024-02-02 16:16:13,809 INFO L175 Difference]: Start difference. First operand has 77 places, 61 transitions, 274 flow. Second operand 3 states and 153 transitions. [2024-02-02 16:16:13,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 393 flow [2024-02-02 16:16:13,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 73 transitions, 384 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 16:16:13,813 INFO L231 Difference]: Finished difference. Result has 78 places, 61 transitions, 277 flow [2024-02-02 16:16:13,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=277, PETRI_PLACES=78, PETRI_TRANSITIONS=61} [2024-02-02 16:16:13,817 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 9 predicate places. [2024-02-02 16:16:13,818 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 61 transitions, 277 flow [2024-02-02 16:16:13,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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) [2024-02-02 16:16:13,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:13,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:13,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-02 16:16:13,821 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-02 16:16:13,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:13,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1123170547, now seen corresponding path program 1 times [2024-02-02 16:16:13,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:13,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730737433] [2024-02-02 16:16:13,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:13,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:13,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:13,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730737433] [2024-02-02 16:16:13,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730737433] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:13,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:13,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:16:13,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564614511] [2024-02-02 16:16:13,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:13,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:16:13,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:13,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:16:13,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:16:13,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 65 [2024-02-02 16:16:13,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 61 transitions, 277 flow. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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) [2024-02-02 16:16:13,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:13,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 65 [2024-02-02 16:16:13,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:14,213 INFO L124 PetriNetUnfolderBase]: 1024/2236 cut-off events. [2024-02-02 16:16:14,213 INFO L125 PetriNetUnfolderBase]: For 1328/1341 co-relation queries the response was YES. [2024-02-02 16:16:14,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5391 conditions, 2236 events. 1024/2236 cut-off events. For 1328/1341 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15698 event pairs, 411 based on Foata normal form. 34/2238 useless extension candidates. Maximal degree in co-relation 5363. Up to 1041 conditions per place. [2024-02-02 16:16:14,232 INFO L140 encePairwiseOnDemand]: 58/65 looper letters, 59 selfloop transitions, 12 changer transitions 0/91 dead transitions. [2024-02-02 16:16:14,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 91 transitions, 511 flow [2024-02-02 16:16:14,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:16:14,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:16:14,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 180 transitions. [2024-02-02 16:16:14,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6923076923076923 [2024-02-02 16:16:14,235 INFO L175 Difference]: Start difference. First operand has 78 places, 61 transitions, 277 flow. Second operand 4 states and 180 transitions. [2024-02-02 16:16:14,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 91 transitions, 511 flow [2024-02-02 16:16:14,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 91 transitions, 496 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 16:16:14,241 INFO L231 Difference]: Finished difference. Result has 82 places, 65 transitions, 341 flow [2024-02-02 16:16:14,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=341, PETRI_PLACES=82, PETRI_TRANSITIONS=65} [2024-02-02 16:16:14,242 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 13 predicate places. [2024-02-02 16:16:14,242 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 65 transitions, 341 flow [2024-02-02 16:16:14,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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) [2024-02-02 16:16:14,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:14,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:14,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-02 16:16:14,243 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-02 16:16:14,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:14,243 INFO L85 PathProgramCache]: Analyzing trace with hash -22321037, now seen corresponding path program 2 times [2024-02-02 16:16:14,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:14,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535699940] [2024-02-02 16:16:14,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:14,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:14,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:14,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535699940] [2024-02-02 16:16:14,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535699940] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:14,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:14,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:16:14,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65905490] [2024-02-02 16:16:14,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:14,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:16:14,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:14,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:16:14,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:16:14,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 65 [2024-02-02 16:16:14,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 65 transitions, 341 flow. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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) [2024-02-02 16:16:14,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:14,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 65 [2024-02-02 16:16:14,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:14,646 INFO L124 PetriNetUnfolderBase]: 1054/2378 cut-off events. [2024-02-02 16:16:14,646 INFO L125 PetriNetUnfolderBase]: For 2426/2444 co-relation queries the response was YES. [2024-02-02 16:16:14,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5841 conditions, 2378 events. 1054/2378 cut-off events. For 2426/2444 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 17121 event pairs, 251 based on Foata normal form. 30/2370 useless extension candidates. Maximal degree in co-relation 5810. Up to 1199 conditions per place. [2024-02-02 16:16:14,664 INFO L140 encePairwiseOnDemand]: 61/65 looper letters, 58 selfloop transitions, 10 changer transitions 2/90 dead transitions. [2024-02-02 16:16:14,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 90 transitions, 556 flow [2024-02-02 16:16:14,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:16:14,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:16:14,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 176 transitions. [2024-02-02 16:16:14,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.676923076923077 [2024-02-02 16:16:14,666 INFO L175 Difference]: Start difference. First operand has 82 places, 65 transitions, 341 flow. Second operand 4 states and 176 transitions. [2024-02-02 16:16:14,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 90 transitions, 556 flow [2024-02-02 16:16:14,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 90 transitions, 537 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-02 16:16:14,675 INFO L231 Difference]: Finished difference. Result has 82 places, 65 transitions, 352 flow [2024-02-02 16:16:14,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=352, PETRI_PLACES=82, PETRI_TRANSITIONS=65} [2024-02-02 16:16:14,677 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 13 predicate places. [2024-02-02 16:16:14,677 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 65 transitions, 352 flow [2024-02-02 16:16:14,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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) [2024-02-02 16:16:14,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:14,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:14,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-02 16:16:14,678 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-02 16:16:14,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:14,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1405220373, now seen corresponding path program 1 times [2024-02-02 16:16:14,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:14,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042762193] [2024-02-02 16:16:14,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:14,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:14,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:14,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042762193] [2024-02-02 16:16:14,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042762193] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:14,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:14,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:16:14,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366713553] [2024-02-02 16:16:14,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:14,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:16:14,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:14,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:16:14,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:16:14,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 65 [2024-02-02 16:16:14,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 65 transitions, 352 flow. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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) [2024-02-02 16:16:14,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:14,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 65 [2024-02-02 16:16:14,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:15,172 INFO L124 PetriNetUnfolderBase]: 1242/2811 cut-off events. [2024-02-02 16:16:15,172 INFO L125 PetriNetUnfolderBase]: For 2751/2762 co-relation queries the response was YES. [2024-02-02 16:16:15,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6894 conditions, 2811 events. 1242/2811 cut-off events. For 2751/2762 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 20831 event pairs, 354 based on Foata normal form. 20/2767 useless extension candidates. Maximal degree in co-relation 6152. Up to 852 conditions per place. [2024-02-02 16:16:15,188 INFO L140 encePairwiseOnDemand]: 59/65 looper letters, 59 selfloop transitions, 12 changer transitions 7/96 dead transitions. [2024-02-02 16:16:15,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 96 transitions, 595 flow [2024-02-02 16:16:15,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:16:15,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:16:15,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 177 transitions. [2024-02-02 16:16:15,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6807692307692308 [2024-02-02 16:16:15,190 INFO L175 Difference]: Start difference. First operand has 82 places, 65 transitions, 352 flow. Second operand 4 states and 177 transitions. [2024-02-02 16:16:15,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 96 transitions, 595 flow [2024-02-02 16:16:15,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 96 transitions, 567 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-02-02 16:16:15,197 INFO L231 Difference]: Finished difference. Result has 82 places, 63 transitions, 368 flow [2024-02-02 16:16:15,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=368, PETRI_PLACES=82, PETRI_TRANSITIONS=63} [2024-02-02 16:16:15,199 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 13 predicate places. [2024-02-02 16:16:15,199 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 63 transitions, 368 flow [2024-02-02 16:16:15,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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) [2024-02-02 16:16:15,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:15,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:15,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-02 16:16:15,200 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-02 16:16:15,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:15,201 INFO L85 PathProgramCache]: Analyzing trace with hash -311079425, now seen corresponding path program 1 times [2024-02-02 16:16:15,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:15,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386134570] [2024-02-02 16:16:15,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:15,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:15,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:15,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386134570] [2024-02-02 16:16:15,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386134570] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:15,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:15,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:16:15,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345968550] [2024-02-02 16:16:15,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:15,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:16:15,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:15,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:16:15,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:16:15,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 65 [2024-02-02 16:16:15,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 63 transitions, 368 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) [2024-02-02 16:16:15,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:15,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 65 [2024-02-02 16:16:15,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:15,600 INFO L124 PetriNetUnfolderBase]: 1383/2944 cut-off events. [2024-02-02 16:16:15,601 INFO L125 PetriNetUnfolderBase]: For 3339/3349 co-relation queries the response was YES. [2024-02-02 16:16:15,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7709 conditions, 2944 events. 1383/2944 cut-off events. For 3339/3349 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 21097 event pairs, 273 based on Foata normal form. 56/2991 useless extension candidates. Maximal degree in co-relation 7681. Up to 1313 conditions per place. [2024-02-02 16:16:15,623 INFO L140 encePairwiseOnDemand]: 60/65 looper letters, 67 selfloop transitions, 10 changer transitions 4/96 dead transitions. [2024-02-02 16:16:15,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 96 transitions, 668 flow [2024-02-02 16:16:15,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:16:15,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:16:15,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 171 transitions. [2024-02-02 16:16:15,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6576923076923077 [2024-02-02 16:16:15,624 INFO L175 Difference]: Start difference. First operand has 82 places, 63 transitions, 368 flow. Second operand 4 states and 171 transitions. [2024-02-02 16:16:15,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 96 transitions, 668 flow [2024-02-02 16:16:15,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 96 transitions, 662 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-02-02 16:16:15,636 INFO L231 Difference]: Finished difference. Result has 83 places, 63 transitions, 398 flow [2024-02-02 16:16:15,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=398, PETRI_PLACES=83, PETRI_TRANSITIONS=63} [2024-02-02 16:16:15,637 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 14 predicate places. [2024-02-02 16:16:15,637 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 63 transitions, 398 flow [2024-02-02 16:16:15,638 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) [2024-02-02 16:16:15,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:15,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:15,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-02-02 16:16:15,638 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-02 16:16:15,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:15,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1840434139, now seen corresponding path program 2 times [2024-02-02 16:16:15,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:15,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595102054] [2024-02-02 16:16:15,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:15,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:15,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:15,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595102054] [2024-02-02 16:16:15,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595102054] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:15,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:15,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:16:15,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937612782] [2024-02-02 16:16:15,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:15,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:16:15,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:15,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:16:15,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:16:15,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 65 [2024-02-02 16:16:15,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 63 transitions, 398 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) [2024-02-02 16:16:15,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:15,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 65 [2024-02-02 16:16:15,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:16,086 INFO L124 PetriNetUnfolderBase]: 1537/3354 cut-off events. [2024-02-02 16:16:16,087 INFO L125 PetriNetUnfolderBase]: For 5523/5535 co-relation queries the response was YES. [2024-02-02 16:16:16,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9254 conditions, 3354 events. 1537/3354 cut-off events. For 5523/5535 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 25450 event pairs, 647 based on Foata normal form. 56/3381 useless extension candidates. Maximal degree in co-relation 9224. Up to 1258 conditions per place. [2024-02-02 16:16:16,116 INFO L140 encePairwiseOnDemand]: 58/65 looper letters, 75 selfloop transitions, 17 changer transitions 0/107 dead transitions. [2024-02-02 16:16:16,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 107 transitions, 820 flow [2024-02-02 16:16:16,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:16:16,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:16:16,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 171 transitions. [2024-02-02 16:16:16,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6576923076923077 [2024-02-02 16:16:16,118 INFO L175 Difference]: Start difference. First operand has 83 places, 63 transitions, 398 flow. Second operand 4 states and 171 transitions. [2024-02-02 16:16:16,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 107 transitions, 820 flow [2024-02-02 16:16:16,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 107 transitions, 802 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-02-02 16:16:16,131 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 545 flow [2024-02-02 16:16:16,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=545, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2024-02-02 16:16:16,132 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 13 predicate places. [2024-02-02 16:16:16,132 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 545 flow [2024-02-02 16:16:16,132 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) [2024-02-02 16:16:16,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:16,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:16,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-02-02 16:16:16,133 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-02 16:16:16,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:16,133 INFO L85 PathProgramCache]: Analyzing trace with hash -991029077, now seen corresponding path program 1 times [2024-02-02 16:16:16,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:16,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188035436] [2024-02-02 16:16:16,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:16,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:16,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:16,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188035436] [2024-02-02 16:16:16,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188035436] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:16,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:16,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-02 16:16:16,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391718487] [2024-02-02 16:16:16,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:16,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-02 16:16:16,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:16,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-02 16:16:16,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-02 16:16:16,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 65 [2024-02-02 16:16:16,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 545 flow. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 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) [2024-02-02 16:16:16,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:16,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 65 [2024-02-02 16:16:16,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:16,666 INFO L124 PetriNetUnfolderBase]: 1745/3524 cut-off events. [2024-02-02 16:16:16,667 INFO L125 PetriNetUnfolderBase]: For 6154/6176 co-relation queries the response was YES. [2024-02-02 16:16:16,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10303 conditions, 3524 events. 1745/3524 cut-off events. For 6154/6176 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 25314 event pairs, 283 based on Foata normal form. 120/3635 useless extension candidates. Maximal degree in co-relation 10274. Up to 1446 conditions per place. [2024-02-02 16:16:16,693 INFO L140 encePairwiseOnDemand]: 58/65 looper letters, 84 selfloop transitions, 11 changer transitions 4/111 dead transitions. [2024-02-02 16:16:16,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 111 transitions, 909 flow [2024-02-02 16:16:16,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 16:16:16,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 16:16:16,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 190 transitions. [2024-02-02 16:16:16,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846153846153846 [2024-02-02 16:16:16,695 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 545 flow. Second operand 5 states and 190 transitions. [2024-02-02 16:16:16,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 111 transitions, 909 flow [2024-02-02 16:16:16,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 111 transitions, 902 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 16:16:16,706 INFO L231 Difference]: Finished difference. Result has 83 places, 71 transitions, 554 flow [2024-02-02 16:16:16,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=554, PETRI_PLACES=83, PETRI_TRANSITIONS=71} [2024-02-02 16:16:16,707 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 14 predicate places. [2024-02-02 16:16:16,708 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 71 transitions, 554 flow [2024-02-02 16:16:16,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 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) [2024-02-02 16:16:16,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:16,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:16,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-02-02 16:16:16,710 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-02 16:16:16,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:16,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1702112306, now seen corresponding path program 1 times [2024-02-02 16:16:16,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:16,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422363274] [2024-02-02 16:16:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:16,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:16,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:16,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422363274] [2024-02-02 16:16:16,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422363274] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:16,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:16,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-02 16:16:16,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524253899] [2024-02-02 16:16:16,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:16,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-02 16:16:16,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:16,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-02 16:16:16,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-02 16:16:16,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 65 [2024-02-02 16:16:16,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 71 transitions, 554 flow. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 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) [2024-02-02 16:16:16,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:16,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 65 [2024-02-02 16:16:16,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:17,306 INFO L124 PetriNetUnfolderBase]: 1642/3345 cut-off events. [2024-02-02 16:16:17,307 INFO L125 PetriNetUnfolderBase]: For 6635/6651 co-relation queries the response was YES. [2024-02-02 16:16:17,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10224 conditions, 3345 events. 1642/3345 cut-off events. For 6635/6651 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 23995 event pairs, 338 based on Foata normal form. 72/3408 useless extension candidates. Maximal degree in co-relation 10196. Up to 1193 conditions per place. [2024-02-02 16:16:17,333 INFO L140 encePairwiseOnDemand]: 59/65 looper letters, 76 selfloop transitions, 22 changer transitions 2/112 dead transitions. [2024-02-02 16:16:17,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 112 transitions, 938 flow [2024-02-02 16:16:17,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 16:16:17,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 16:16:17,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 192 transitions. [2024-02-02 16:16:17,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5907692307692308 [2024-02-02 16:16:17,335 INFO L175 Difference]: Start difference. First operand has 83 places, 71 transitions, 554 flow. Second operand 5 states and 192 transitions. [2024-02-02 16:16:17,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 112 transitions, 938 flow [2024-02-02 16:16:17,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 112 transitions, 920 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 16:16:17,346 INFO L231 Difference]: Finished difference. Result has 83 places, 74 transitions, 656 flow [2024-02-02 16:16:17,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=656, PETRI_PLACES=83, PETRI_TRANSITIONS=74} [2024-02-02 16:16:17,347 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 14 predicate places. [2024-02-02 16:16:17,347 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 74 transitions, 656 flow [2024-02-02 16:16:17,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 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) [2024-02-02 16:16:17,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:17,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:17,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-02-02 16:16:17,348 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-02 16:16:17,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:17,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1225873599, now seen corresponding path program 1 times [2024-02-02 16:16:17,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:17,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534933024] [2024-02-02 16:16:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:17,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:17,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:17,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534933024] [2024-02-02 16:16:17,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534933024] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:17,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:17,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:16:17,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145171331] [2024-02-02 16:16:17,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:17,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:16:17,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:17,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:16:17,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:16:17,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 65 [2024-02-02 16:16:17,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 74 transitions, 656 flow. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 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) [2024-02-02 16:16:17,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:17,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 65 [2024-02-02 16:16:17,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:17,726 INFO L124 PetriNetUnfolderBase]: 951/2208 cut-off events. [2024-02-02 16:16:17,726 INFO L125 PetriNetUnfolderBase]: For 7158/7215 co-relation queries the response was YES. [2024-02-02 16:16:17,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6839 conditions, 2208 events. 951/2208 cut-off events. For 7158/7215 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16118 event pairs, 343 based on Foata normal form. 69/2260 useless extension candidates. Maximal degree in co-relation 6810. Up to 1254 conditions per place. [2024-02-02 16:16:17,744 INFO L140 encePairwiseOnDemand]: 61/65 looper letters, 50 selfloop transitions, 18 changer transitions 2/87 dead transitions. [2024-02-02 16:16:17,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 87 transitions, 785 flow [2024-02-02 16:16:17,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:16:17,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:16:17,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 174 transitions. [2024-02-02 16:16:17,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6692307692307692 [2024-02-02 16:16:17,746 INFO L175 Difference]: Start difference. First operand has 83 places, 74 transitions, 656 flow. Second operand 4 states and 174 transitions. [2024-02-02 16:16:17,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 87 transitions, 785 flow [2024-02-02 16:16:17,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 87 transitions, 734 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-02-02 16:16:17,755 INFO L231 Difference]: Finished difference. Result has 83 places, 69 transitions, 572 flow [2024-02-02 16:16:17,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=572, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2024-02-02 16:16:17,756 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 14 predicate places. [2024-02-02 16:16:17,756 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 572 flow [2024-02-02 16:16:17,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 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) [2024-02-02 16:16:17,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:17,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:17,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-02-02 16:16:17,757 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-02 16:16:17,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:17,758 INFO L85 PathProgramCache]: Analyzing trace with hash -379328288, now seen corresponding path program 1 times [2024-02-02 16:16:17,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:17,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475639887] [2024-02-02 16:16:17,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:17,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:17,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:17,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475639887] [2024-02-02 16:16:17,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475639887] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:17,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:17,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:16:17,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572299546] [2024-02-02 16:16:17,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:17,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:16:17,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:17,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:16:17,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:16:17,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 65 [2024-02-02 16:16:17,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 572 flow. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 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) [2024-02-02 16:16:17,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:17,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 65 [2024-02-02 16:16:17,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:18,112 INFO L124 PetriNetUnfolderBase]: 931/2208 cut-off events. [2024-02-02 16:16:18,112 INFO L125 PetriNetUnfolderBase]: For 5310/5364 co-relation queries the response was YES. [2024-02-02 16:16:18,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6697 conditions, 2208 events. 931/2208 cut-off events. For 5310/5364 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16252 event pairs, 301 based on Foata normal form. 39/2224 useless extension candidates. Maximal degree in co-relation 6668. Up to 1000 conditions per place. [2024-02-02 16:16:18,128 INFO L140 encePairwiseOnDemand]: 61/65 looper letters, 50 selfloop transitions, 22 changer transitions 2/91 dead transitions. [2024-02-02 16:16:18,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 91 transitions, 792 flow [2024-02-02 16:16:18,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:16:18,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:16:18,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 169 transitions. [2024-02-02 16:16:18,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-02-02 16:16:18,131 INFO L175 Difference]: Start difference. First operand has 83 places, 69 transitions, 572 flow. Second operand 4 states and 169 transitions. [2024-02-02 16:16:18,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 91 transitions, 792 flow [2024-02-02 16:16:18,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 91 transitions, 751 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-02-02 16:16:18,138 INFO L231 Difference]: Finished difference. Result has 84 places, 69 transitions, 600 flow [2024-02-02 16:16:18,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=600, PETRI_PLACES=84, PETRI_TRANSITIONS=69} [2024-02-02 16:16:18,139 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 15 predicate places. [2024-02-02 16:16:18,139 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 69 transitions, 600 flow [2024-02-02 16:16:18,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 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) [2024-02-02 16:16:18,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:18,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:18,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-02-02 16:16:18,140 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 30 more)] === [2024-02-02 16:16:18,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:18,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1820982657, now seen corresponding path program 1 times [2024-02-02 16:16:18,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:18,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847405910] [2024-02-02 16:16:18,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:18,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:18,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-02 16:16:18,166 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-02 16:16:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-02 16:16:18,213 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-02 16:16:18,213 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-02 16:16:18,214 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location thread3Err3ASSERT_VIOLATIONERROR_FUNCTION (32 of 33 remaining) [2024-02-02 16:16:18,216 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 33 remaining) [2024-02-02 16:16:18,217 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 33 remaining) [2024-02-02 16:16:18,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 33 remaining) [2024-02-02 16:16:18,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 33 remaining) [2024-02-02 16:16:18,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 33 remaining) [2024-02-02 16:16:18,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 33 remaining) [2024-02-02 16:16:18,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 33 remaining) [2024-02-02 16:16:18,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 33 remaining) [2024-02-02 16:16:18,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 33 remaining) [2024-02-02 16:16:18,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 33 remaining) [2024-02-02 16:16:18,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err2ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 33 remaining) [2024-02-02 16:16:18,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err4ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 33 remaining) [2024-02-02 16:16:18,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err3ASSERT_VIOLATIONERROR_FUNCTION (19 of 33 remaining) [2024-02-02 16:16:18,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err5ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 33 remaining) [2024-02-02 16:16:18,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 33 remaining) [2024-02-02 16:16:18,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 33 remaining) [2024-02-02 16:16:18,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 33 remaining) [2024-02-02 16:16:18,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 33 remaining) [2024-02-02 16:16:18,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 33 remaining) [2024-02-02 16:16:18,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 33 remaining) [2024-02-02 16:16:18,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 33 remaining) [2024-02-02 16:16:18,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 33 remaining) [2024-02-02 16:16:18,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 33 remaining) [2024-02-02 16:16:18,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 33 remaining) [2024-02-02 16:16:18,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 33 remaining) [2024-02-02 16:16:18,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 33 remaining) [2024-02-02 16:16:18,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 33 remaining) [2024-02-02 16:16:18,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 33 remaining) [2024-02-02 16:16:18,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 33 remaining) [2024-02-02 16:16:18,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err2ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 33 remaining) [2024-02-02 16:16:18,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err4ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 33 remaining) [2024-02-02 16:16:18,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err5ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 33 remaining) [2024-02-02 16:16:18,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-02-02 16:16:18,225 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:18,233 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-02-02 16:16:18,233 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-02-02 16:16:18,289 INFO L503 ceAbstractionStarter]: Automizer considered 15 witness invariants [2024-02-02 16:16:18,289 INFO L504 ceAbstractionStarter]: WitnessConsidered=15 [2024-02-02 16:16:18,291 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.02 04:16:18 BasicIcfg [2024-02-02 16:16:18,291 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-02-02 16:16:18,291 INFO L158 Benchmark]: Toolchain (without parser) took 11141.98ms. Allocated memory was 165.7MB in the beginning and 501.2MB in the end (delta: 335.5MB). Free memory was 136.7MB in the beginning and 383.1MB in the end (delta: -246.4MB). Peak memory consumption was 88.4MB. Max. memory is 16.1GB. [2024-02-02 16:16:18,292 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 123.7MB. Free memory is still 83.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-02 16:16:18,292 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 123.7MB. Free memory is still 52.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-02 16:16:18,292 INFO L158 Benchmark]: CACSL2BoogieTranslator took 626.46ms. Allocated memory is still 165.7MB. Free memory was 136.5MB in the beginning and 110.7MB in the end (delta: 25.8MB). Peak memory consumption was 29.6MB. Max. memory is 16.1GB. [2024-02-02 16:16:18,292 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.39ms. Allocated memory is still 165.7MB. Free memory was 110.7MB in the beginning and 108.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-02 16:16:18,293 INFO L158 Benchmark]: Boogie Preprocessor took 83.84ms. Allocated memory is still 165.7MB. Free memory was 108.6MB in the beginning and 106.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-02 16:16:18,293 INFO L158 Benchmark]: RCFGBuilder took 641.98ms. Allocated memory is still 165.7MB. Free memory was 106.5MB in the beginning and 78.1MB in the end (delta: 28.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2024-02-02 16:16:18,293 INFO L158 Benchmark]: TraceAbstraction took 9733.55ms. Allocated memory was 165.7MB in the beginning and 501.2MB in the end (delta: 335.5MB). Free memory was 78.1MB in the beginning and 383.1MB in the end (delta: -305.0MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2024-02-02 16:16:18,294 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 123.7MB. Free memory is still 83.5MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.16ms. Allocated memory is still 123.7MB. Free memory is still 52.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 626.46ms. Allocated memory is still 165.7MB. Free memory was 136.5MB in the beginning and 110.7MB in the end (delta: 25.8MB). Peak memory consumption was 29.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.39ms. Allocated memory is still 165.7MB. Free memory was 110.7MB in the beginning and 108.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 83.84ms. Allocated memory is still 165.7MB. Free memory was 108.6MB in the beginning and 106.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 641.98ms. Allocated memory is still 165.7MB. Free memory was 106.5MB in the beginning and 78.1MB in the end (delta: 28.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * TraceAbstraction took 9733.55ms. Allocated memory was 165.7MB in the beginning and 501.2MB in the end (delta: 335.5MB). Free memory was 78.1MB in the beginning and 383.1MB in the end (delta: -305.0MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L702] 0 pthread_mutex_t mutex; [L702] 0 pthread_mutex_t mutex; [L702] 0 pthread_mutex_t mutex; [L702] 0 pthread_mutex_t mutex; [L702] 0 pthread_mutex_t mutex; [L702] 0 pthread_mutex_t mutex; [L703] 0 int data = 0; [L730] 0 CodeAnnotStmt[Assertion[BinaryExpression[COMPEQ,IdentifierExpression[data],IntegerLiteral[0]]]] [L731] 0 pthread_t t1, t2, t3; VAL [data=0, mutex={3:0}, t1={7:0}, t2={5:0}, t3={6:0}] [L732] 0 CodeAnnotStmt[Assertion[BinaryExpression[COMPEQ,IdentifierExpression[data],IntegerLiteral[0]]]] [L732] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [arg={0:0}, data=0, mutex={3:0}, t1={7:0}, t2={5:0}, t3={6:0}] [L706] 1 CodeAnnotStmt[Assertion[BinaryExpression[COMPEQ,CastExpression[ACSLType[unsigned long],IdentifierExpression[arg]],IntegerLiteral[0UL]]]] VAL [arg={0:0}, arg={0:0}, data=0, mutex={3:0}] [L733] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [arg={0:0}, arg={0:0}, arg={0:0}, data=0, mutex={3:0}, t1={7:0}, t2={5:0}, t3={6:0}] [L734] FCALL, FORK 0 pthread_create(&t3, 0, thread3, 0) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=0, mutex={3:0}, t1={7:0}, t2={5:0}, t3={6:0}] [L713] 2 CodeAnnotStmt[Assertion[BinaryExpression[COMPEQ,CastExpression[ACSLType[unsigned long],IdentifierExpression[arg]],IntegerLiteral[0UL]]]] VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=0, mutex={3:0}] [L720] 3 CodeAnnotStmt[Assertion[BinaryExpression[COMPEQ,CastExpression[ACSLType[unsigned long],IdentifierExpression[arg]],IntegerLiteral[0UL]]]] VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=0, mutex={3:0}] [L707] 1 CodeAnnotStmt[Assertion[BinaryExpression[LOGICAND,BinaryExpression[COMPLEQ,IntegerLiteral[0],IdentifierExpression[data]],BinaryExpression[COMPEQ,CastExpression[ACSLType[unsigned long],IdentifierExpression[arg]],IntegerLiteral[0UL]]]]] [L707] 1 data++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=1, mutex={3:0}] [L708] 1 CodeAnnotStmt[Assertion[BinaryExpression[LOGICAND,BinaryExpression[COMPLEQ,IntegerLiteral[1],IdentifierExpression[data]],BinaryExpression[COMPEQ,CastExpression[ACSLType[unsigned long],IdentifierExpression[arg]],IntegerLiteral[0UL]]]]] VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=1, mutex={3:0}] [L714] 2 CodeAnnotStmt[Assertion[BinaryExpression[LOGICAND,BinaryExpression[COMPLEQ,IntegerLiteral[0],IdentifierExpression[data]],BinaryExpression[COMPEQ,CastExpression[ACSLType[unsigned long],IdentifierExpression[arg]],IntegerLiteral[0UL]]]]] [L714] 2 data+=2 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=3, mutex={3:0}] [L715] 2 CodeAnnotStmt[Assertion[BinaryExpression[LOGICAND,BinaryExpression[COMPLEQ,IntegerLiteral[2],IdentifierExpression[data]],BinaryExpression[COMPEQ,CastExpression[ACSLType[unsigned long],IdentifierExpression[arg]],IntegerLiteral[0UL]]]]] VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=3, mutex={3:0}] [L721] 3 CodeAnnotStmt[Assertion[BinaryExpression[LOGICAND,BinaryExpression[COMPLEQ,IntegerLiteral[0],IdentifierExpression[data]],BinaryExpression[COMPEQ,CastExpression[ACSLType[unsigned long],IdentifierExpression[arg]],IntegerLiteral[0UL]]]]] VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=3, mutex={3:0}] [L721] COND TRUE 3 data >= 3 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=3, mutex={3:0}] [L722] 3 CodeAnnotStmt[Assertion[BinaryExpression[LOGICAND,BinaryExpression[LOGICAND,BinaryExpression[COMPLEQ,IntegerLiteral[3],IdentifierExpression[data]],BinaryExpression[COMPEQ,CastExpression[ACSLType[unsigned long],IdentifierExpression[arg]],IntegerLiteral[0UL]]],BinaryExpression[COMPNEQ,IdentifierExpression[data],IntegerLiteral[0]]]]] VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=3, mutex={3:0}] [L722] 3 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=3, mutex={3:0}] - UnprovableResult [Line: 706]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 708]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 709]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 716]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 720]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 721]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 722]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 725]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 726]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 730]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 732]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 734]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 732]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 733]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 115 locations, 33 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 9.5s, OverallIterations: 20, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 7.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1378 SdHoareTripleChecker+Valid, 2.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 948 mSDsluCounter, 148 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 57 mSDsCounter, 151 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2465 IncrementalHoareTripleChecker+Invalid, 2616 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 151 mSolverCounterUnsat, 91 mSDtfsCounter, 2465 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=656occurred in iteration=17, InterpolantAutomatonStates: 78, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 311 NumberOfCodeBlocks, 311 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 262 ConstructedInterpolants, 0 QuantifiedInterpolants, 1209 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 19 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-02-02 16:16:18,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE