/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 02:54:34,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 02:54:34,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 02:54:34,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 02:54:34,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 02:54:34,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 02:54:34,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 02:54:34,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 02:54:34,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 02:54:34,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 02:54:34,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 02:54:34,799 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 02:54:34,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 02:54:34,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 02:54:34,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 02:54:34,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 02:54:34,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 02:54:34,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 02:54:34,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 02:54:34,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 02:54:34,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 02:54:34,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 02:54:34,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 02:54:34,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 02:54:34,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 02:54:34,822 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 02:54:34,822 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 02:54:34,823 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 02:54:34,823 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 02:54:34,824 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 02:54:34,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 02:54:34,825 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 02:54:34,826 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 02:54:34,827 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 02:54:34,828 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 02:54:34,828 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 02:54:34,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 02:54:34,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 02:54:34,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 02:54:34,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 02:54:34,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 02:54:34,832 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 02:54:34,862 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 02:54:34,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 02:54:34,864 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 02:54:34,864 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 02:54:34,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 02:54:34,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 02:54:34,865 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 02:54:34,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 02:54:34,865 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 02:54:34,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 02:54:34,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 02:54:34,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 02:54:34,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 02:54:34,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 02:54:34,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 02:54:34,866 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 02:54:34,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 02:54:34,867 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 02:54:34,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 02:54:34,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 02:54:34,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 02:54:34,867 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 02:54:34,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 02:54:34,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 02:54:34,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 02:54:34,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 02:54:34,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 02:54:34,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 02:54:34,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 02:54:34,868 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 02:54:34,868 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 02:54:34,868 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 02:54:35,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 02:54:35,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 02:54:35,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 02:54:35,107 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 02:54:35,107 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 02:54:35,108 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c [2023-01-28 02:54:36,229 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 02:54:36,420 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 02:54:36,420 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c [2023-01-28 02:54:36,427 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c69a8b3e5/3ff16f447ad24e54ae00235a8bd7c102/FLAG5d0f20463 [2023-01-28 02:54:36,440 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c69a8b3e5/3ff16f447ad24e54ae00235a8bd7c102 [2023-01-28 02:54:36,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 02:54:36,445 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 02:54:36,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 02:54:36,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 02:54:36,451 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 02:54:36,452 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 02:54:36" (1/1) ... [2023-01-28 02:54:36,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@338fe928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:54:36, skipping insertion in model container [2023-01-28 02:54:36,453 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 02:54:36" (1/1) ... [2023-01-28 02:54:36,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 02:54:36,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 02:54:36,657 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c[4929,4942] [2023-01-28 02:54:36,664 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 02:54:36,673 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 02:54:36,700 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c[4929,4942] [2023-01-28 02:54:36,703 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 02:54:36,715 INFO L208 MainTranslator]: Completed translation [2023-01-28 02:54:36,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:54:36 WrapperNode [2023-01-28 02:54:36,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 02:54:36,716 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 02:54:36,717 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 02:54:36,717 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 02:54:36,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:54:36" (1/1) ... [2023-01-28 02:54:36,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:54:36" (1/1) ... [2023-01-28 02:54:36,774 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 21, calls inlined = 29, statements flattened = 406 [2023-01-28 02:54:36,774 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 02:54:36,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 02:54:36,775 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 02:54:36,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 02:54:36,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:54:36" (1/1) ... [2023-01-28 02:54:36,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:54:36" (1/1) ... [2023-01-28 02:54:36,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:54:36" (1/1) ... [2023-01-28 02:54:36,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:54:36" (1/1) ... [2023-01-28 02:54:36,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:54:36" (1/1) ... [2023-01-28 02:54:36,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:54:36" (1/1) ... [2023-01-28 02:54:36,806 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:54:36" (1/1) ... [2023-01-28 02:54:36,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:54:36" (1/1) ... [2023-01-28 02:54:36,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 02:54:36,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 02:54:36,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 02:54:36,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 02:54:36,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:54:36" (1/1) ... [2023-01-28 02:54:36,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 02:54:36,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:54:36,837 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 02:54:36,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 02:54:36,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 02:54:36,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 02:54:36,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 02:54:36,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 02:54:36,867 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 02:54:36,868 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 02:54:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 02:54:36,868 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 02:54:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 02:54:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 02:54:36,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 02:54:36,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 02:54:36,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 02:54:36,870 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 02:54:37,017 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 02:54:37,018 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 02:54:37,700 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 02:54:37,719 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 02:54:37,719 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-01-28 02:54:37,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 02:54:37 BoogieIcfgContainer [2023-01-28 02:54:37,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 02:54:37,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 02:54:37,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 02:54:37,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 02:54:37,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 02:54:36" (1/3) ... [2023-01-28 02:54:37,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718ca251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 02:54:37, skipping insertion in model container [2023-01-28 02:54:37,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:54:36" (2/3) ... [2023-01-28 02:54:37,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718ca251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 02:54:37, skipping insertion in model container [2023-01-28 02:54:37,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 02:54:37" (3/3) ... [2023-01-28 02:54:37,730 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2023-01-28 02:54:37,746 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 02:54:37,746 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 02:54:37,746 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 02:54:37,895 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 02:54:37,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 443 places, 485 transitions, 986 flow [2023-01-28 02:54:38,111 INFO L130 PetriNetUnfolder]: 49/483 cut-off events. [2023-01-28 02:54:38,112 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 02:54:38,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 483 events. 49/483 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1351 event pairs, 0 based on Foata normal form. 0/433 useless extension candidates. Maximal degree in co-relation 323. Up to 2 conditions per place. [2023-01-28 02:54:38,124 INFO L82 GeneralOperation]: Start removeDead. Operand has 443 places, 485 transitions, 986 flow [2023-01-28 02:54:38,132 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 433 places, 475 transitions, 962 flow [2023-01-28 02:54:38,135 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 02:54:38,145 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 433 places, 475 transitions, 962 flow [2023-01-28 02:54:38,147 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 433 places, 475 transitions, 962 flow [2023-01-28 02:54:38,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 433 places, 475 transitions, 962 flow [2023-01-28 02:54:38,245 INFO L130 PetriNetUnfolder]: 49/475 cut-off events. [2023-01-28 02:54:38,245 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 02:54:38,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 475 events. 49/475 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1318 event pairs, 0 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 323. Up to 2 conditions per place. [2023-01-28 02:54:38,270 INFO L119 LiptonReduction]: Number of co-enabled transitions 53352 [2023-01-28 02:54:57,427 INFO L134 LiptonReduction]: Checked pairs total: 50280 [2023-01-28 02:54:57,428 INFO L136 LiptonReduction]: Total number of compositions: 621 [2023-01-28 02:54:57,453 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 02:54:57,463 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=LoopsAndPotentialCycles, 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;@31fb7593, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 02:54:57,463 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 02:54:57,471 INFO L130 PetriNetUnfolder]: 7/28 cut-off events. [2023-01-28 02:54:57,471 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 02:54:57,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:54:57,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:54:57,473 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:54:57,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:54:57,477 INFO L85 PathProgramCache]: Analyzing trace with hash -36243124, now seen corresponding path program 1 times [2023-01-28 02:54:57,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:54:57,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2485627] [2023-01-28 02:54:57,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:54:57,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:54:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:54:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:54:57,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:54:57,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2485627] [2023-01-28 02:54:57,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2485627] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:54:57,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:54:57,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 02:54:57,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736695855] [2023-01-28 02:54:57,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:54:57,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 02:54:57,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:54:57,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 02:54:57,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 02:54:57,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 435 out of 1106 [2023-01-28 02:54:57,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 439.3333333333333) internal successors, (1318), 3 states have internal predecessors, (1318), 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) [2023-01-28 02:54:57,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:54:57,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 435 of 1106 [2023-01-28 02:54:57,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:54:58,061 INFO L130 PetriNetUnfolder]: 157/250 cut-off events. [2023-01-28 02:54:58,061 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-01-28 02:54:58,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 250 events. 157/250 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 638 event pairs, 87 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 472. Up to 249 conditions per place. [2023-01-28 02:54:58,064 INFO L137 encePairwiseOnDemand]: 1101/1106 looper letters, 27 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2023-01-28 02:54:58,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 31 transitions, 136 flow [2023-01-28 02:54:58,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 02:54:58,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 02:54:58,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1338 transitions. [2023-01-28 02:54:58,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40325497287522605 [2023-01-28 02:54:58,089 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1338 transitions. [2023-01-28 02:54:58,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1338 transitions. [2023-01-28 02:54:58,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:54:58,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1338 transitions. [2023-01-28 02:54:58,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 446.0) internal successors, (1338), 3 states have internal predecessors, (1338), 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) [2023-01-28 02:54:58,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1106.0) internal successors, (4424), 4 states have internal predecessors, (4424), 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) [2023-01-28 02:54:58,111 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1106.0) internal successors, (4424), 4 states have internal predecessors, (4424), 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) [2023-01-28 02:54:58,113 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 70 flow. Second operand 3 states and 1338 transitions. [2023-01-28 02:54:58,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 31 transitions, 136 flow [2023-01-28 02:54:58,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 31 transitions, 128 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 02:54:58,117 INFO L231 Difference]: Finished difference. Result has 28 places, 31 transitions, 84 flow [2023-01-28 02:54:58,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1106, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=28, PETRI_TRANSITIONS=31} [2023-01-28 02:54:58,123 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-01-28 02:54:58,124 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 31 transitions, 84 flow [2023-01-28 02:54:58,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 439.3333333333333) internal successors, (1318), 3 states have internal predecessors, (1318), 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) [2023-01-28 02:54:58,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:54:58,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:54:58,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 02:54:58,125 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:54:58,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:54:58,126 INFO L85 PathProgramCache]: Analyzing trace with hash -119955902, now seen corresponding path program 1 times [2023-01-28 02:54:58,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:54:58,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020133726] [2023-01-28 02:54:58,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:54:58,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:54:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:54:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:54:58,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:54:58,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020133726] [2023-01-28 02:54:58,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020133726] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:54:58,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189960065] [2023-01-28 02:54:58,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:54:58,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:54:58,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:54:58,337 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:54:58,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 02:54:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:54:58,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-28 02:54:58,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:54:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:54:58,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:54:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:54:58,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189960065] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:54:58,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:54:58,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-01-28 02:54:58,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842481915] [2023-01-28 02:54:58,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:54:58,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 02:54:58,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:54:58,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 02:54:58,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-01-28 02:54:58,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 435 out of 1106 [2023-01-28 02:54:58,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 31 transitions, 84 flow. Second operand has 8 states, 8 states have (on average 437.875) internal successors, (3503), 8 states have internal predecessors, (3503), 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) [2023-01-28 02:54:58,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:54:58,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 435 of 1106 [2023-01-28 02:54:58,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:54:58,752 INFO L130 PetriNetUnfolder]: 157/256 cut-off events. [2023-01-28 02:54:58,752 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 02:54:58,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 256 events. 157/256 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 642 event pairs, 87 based on Foata normal form. 3/190 useless extension candidates. Maximal degree in co-relation 512. Up to 249 conditions per place. [2023-01-28 02:54:58,754 INFO L137 encePairwiseOnDemand]: 1101/1106 looper letters, 27 selfloop transitions, 10 changer transitions 0/37 dead transitions. [2023-01-28 02:54:58,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 182 flow [2023-01-28 02:54:58,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 02:54:58,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 02:54:58,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2653 transitions. [2023-01-28 02:54:58,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.399789029535865 [2023-01-28 02:54:58,761 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2653 transitions. [2023-01-28 02:54:58,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2653 transitions. [2023-01-28 02:54:58,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:54:58,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2653 transitions. [2023-01-28 02:54:58,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 442.1666666666667) internal successors, (2653), 6 states have internal predecessors, (2653), 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) [2023-01-28 02:54:58,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1106.0) internal successors, (7742), 7 states have internal predecessors, (7742), 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) [2023-01-28 02:54:58,781 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1106.0) internal successors, (7742), 7 states have internal predecessors, (7742), 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) [2023-01-28 02:54:58,781 INFO L175 Difference]: Start difference. First operand has 28 places, 31 transitions, 84 flow. Second operand 6 states and 2653 transitions. [2023-01-28 02:54:58,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 182 flow [2023-01-28 02:54:58,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 37 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 02:54:58,783 INFO L231 Difference]: Finished difference. Result has 35 places, 37 transitions, 146 flow [2023-01-28 02:54:58,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1106, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=35, PETRI_TRANSITIONS=37} [2023-01-28 02:54:58,784 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2023-01-28 02:54:58,784 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 37 transitions, 146 flow [2023-01-28 02:54:58,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 437.875) internal successors, (3503), 8 states have internal predecessors, (3503), 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) [2023-01-28 02:54:58,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:54:58,786 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:54:58,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 02:54:58,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:54:58,992 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:54:58,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:54:58,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1905448366, now seen corresponding path program 2 times [2023-01-28 02:54:58,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:54:58,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407860312] [2023-01-28 02:54:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:54:58,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:54:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:54:59,141 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 02:54:59,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:54:59,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407860312] [2023-01-28 02:54:59,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407860312] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:54:59,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117277552] [2023-01-28 02:54:59,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:54:59,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:54:59,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:54:59,143 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:54:59,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 02:54:59,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-28 02:54:59,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:54:59,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 02:54:59,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:54:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-01-28 02:54:59,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 02:54:59,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117277552] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:54:59,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 02:54:59,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-01-28 02:54:59,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573669497] [2023-01-28 02:54:59,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:54:59,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 02:54:59,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:54:59,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 02:54:59,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-01-28 02:54:59,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 416 out of 1106 [2023-01-28 02:54:59,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 37 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 419.75) internal successors, (1679), 4 states have internal predecessors, (1679), 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) [2023-01-28 02:54:59,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:54:59,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 416 of 1106 [2023-01-28 02:54:59,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:55:00,198 INFO L130 PetriNetUnfolder]: 165/285 cut-off events. [2023-01-28 02:55:00,199 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 02:55:00,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 285 events. 165/285 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 853 event pairs, 87 based on Foata normal form. 1/213 useless extension candidates. Maximal degree in co-relation 562. Up to 249 conditions per place. [2023-01-28 02:55:00,201 INFO L137 encePairwiseOnDemand]: 1102/1106 looper letters, 43 selfloop transitions, 1 changer transitions 7/51 dead transitions. [2023-01-28 02:55:00,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 51 transitions, 281 flow [2023-01-28 02:55:00,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 02:55:00,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 02:55:00,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1709 transitions. [2023-01-28 02:55:00,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3863019891500904 [2023-01-28 02:55:00,207 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1709 transitions. [2023-01-28 02:55:00,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1709 transitions. [2023-01-28 02:55:00,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:55:00,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1709 transitions. [2023-01-28 02:55:00,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 427.25) internal successors, (1709), 4 states have internal predecessors, (1709), 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) [2023-01-28 02:55:00,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1106.0) internal successors, (5530), 5 states have internal predecessors, (5530), 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) [2023-01-28 02:55:00,222 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1106.0) internal successors, (5530), 5 states have internal predecessors, (5530), 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) [2023-01-28 02:55:00,222 INFO L175 Difference]: Start difference. First operand has 35 places, 37 transitions, 146 flow. Second operand 4 states and 1709 transitions. [2023-01-28 02:55:00,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 51 transitions, 281 flow [2023-01-28 02:55:00,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 51 transitions, 265 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 02:55:00,226 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 139 flow [2023-01-28 02:55:00,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1106, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2023-01-28 02:55:00,227 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2023-01-28 02:55:00,227 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 139 flow [2023-01-28 02:55:00,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 419.75) internal successors, (1679), 4 states have internal predecessors, (1679), 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) [2023-01-28 02:55:00,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:55:00,229 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:55:00,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 02:55:00,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-01-28 02:55:00,435 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:55:00,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:55:00,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1267452706, now seen corresponding path program 3 times [2023-01-28 02:55:00,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:55:00,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992220164] [2023-01-28 02:55:00,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:55:00,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:55:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:55:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 02:55:00,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:55:00,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992220164] [2023-01-28 02:55:00,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992220164] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:55:00,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640689097] [2023-01-28 02:55:00,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:55:00,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:55:00,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:55:00,633 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:55:00,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 02:55:00,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-01-28 02:55:00,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:55:00,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 02:55:00,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:55:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-01-28 02:55:01,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 02:55:01,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640689097] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:55:01,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 02:55:01,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-01-28 02:55:01,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619733943] [2023-01-28 02:55:01,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:55:01,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 02:55:01,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:55:01,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 02:55:01,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-01-28 02:55:01,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 416 out of 1106 [2023-01-28 02:55:01,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 419.75) internal successors, (1679), 4 states have internal predecessors, (1679), 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) [2023-01-28 02:55:01,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:55:01,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 416 of 1106 [2023-01-28 02:55:01,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:55:01,484 INFO L130 PetriNetUnfolder]: 173/317 cut-off events. [2023-01-28 02:55:01,484 INFO L131 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2023-01-28 02:55:01,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 317 events. 173/317 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1087 event pairs, 96 based on Foata normal form. 3/251 useless extension candidates. Maximal degree in co-relation 720. Up to 256 conditions per place. [2023-01-28 02:55:01,486 INFO L137 encePairwiseOnDemand]: 1102/1106 looper letters, 51 selfloop transitions, 1 changer transitions 5/57 dead transitions. [2023-01-28 02:55:01,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 302 flow [2023-01-28 02:55:01,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 02:55:01,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 02:55:01,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1715 transitions. [2023-01-28 02:55:01,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3876582278481013 [2023-01-28 02:55:01,491 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1715 transitions. [2023-01-28 02:55:01,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1715 transitions. [2023-01-28 02:55:01,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:55:01,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1715 transitions. [2023-01-28 02:55:01,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 428.75) internal successors, (1715), 4 states have internal predecessors, (1715), 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) [2023-01-28 02:55:01,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1106.0) internal successors, (5530), 5 states have internal predecessors, (5530), 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) [2023-01-28 02:55:01,504 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1106.0) internal successors, (5530), 5 states have internal predecessors, (5530), 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) [2023-01-28 02:55:01,504 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 139 flow. Second operand 4 states and 1715 transitions. [2023-01-28 02:55:01,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 302 flow [2023-01-28 02:55:01,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 57 transitions, 296 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-01-28 02:55:01,507 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 145 flow [2023-01-28 02:55:01,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1106, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-01-28 02:55:01,508 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2023-01-28 02:55:01,508 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 145 flow [2023-01-28 02:55:01,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 419.75) internal successors, (1679), 4 states have internal predecessors, (1679), 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) [2023-01-28 02:55:01,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:55:01,509 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:55:01,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 02:55:01,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:55:01,714 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:55:01,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:55:01,715 INFO L85 PathProgramCache]: Analyzing trace with hash 620058531, now seen corresponding path program 1 times [2023-01-28 02:55:01,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:55:01,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527911695] [2023-01-28 02:55:01,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:55:01,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:55:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:55:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 02:55:01,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:55:01,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527911695] [2023-01-28 02:55:01,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527911695] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:55:01,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004304422] [2023-01-28 02:55:01,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:55:01,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:55:01,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:55:01,841 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:55:01,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 02:55:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:55:02,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 02:55:02,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:55:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 02:55:02,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:55:02,099 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 02:55:02,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004304422] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:55:02,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:55:02,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 02:55:02,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881023670] [2023-01-28 02:55:02,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:55:02,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 02:55:02,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:55:02,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 02:55:02,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-01-28 02:55:02,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 435 out of 1106 [2023-01-28 02:55:02,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 145 flow. Second operand has 13 states, 13 states have (on average 437.0769230769231) internal successors, (5682), 13 states have internal predecessors, (5682), 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) [2023-01-28 02:55:02,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:55:02,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 435 of 1106 [2023-01-28 02:55:02,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:55:02,263 INFO L130 PetriNetUnfolder]: 172/313 cut-off events. [2023-01-28 02:55:02,263 INFO L131 PetriNetUnfolder]: For 172/172 co-relation queries the response was YES. [2023-01-28 02:55:02,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 772 conditions, 313 events. 172/313 cut-off events. For 172/172 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1002 event pairs, 124 based on Foata normal form. 1/267 useless extension candidates. Maximal degree in co-relation 752. Up to 304 conditions per place. [2023-01-28 02:55:02,265 INFO L137 encePairwiseOnDemand]: 1101/1106 looper letters, 27 selfloop transitions, 12 changer transitions 0/39 dead transitions. [2023-01-28 02:55:02,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 235 flow [2023-01-28 02:55:02,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 02:55:02,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 02:55:02,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3086 transitions. [2023-01-28 02:55:02,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39860501162490314 [2023-01-28 02:55:02,274 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3086 transitions. [2023-01-28 02:55:02,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3086 transitions. [2023-01-28 02:55:02,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:55:02,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3086 transitions. [2023-01-28 02:55:02,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 440.85714285714283) internal successors, (3086), 7 states have internal predecessors, (3086), 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) [2023-01-28 02:55:02,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1106.0) internal successors, (8848), 8 states have internal predecessors, (8848), 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) [2023-01-28 02:55:02,296 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1106.0) internal successors, (8848), 8 states have internal predecessors, (8848), 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) [2023-01-28 02:55:02,296 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 145 flow. Second operand 7 states and 3086 transitions. [2023-01-28 02:55:02,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 235 flow [2023-01-28 02:55:02,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 232 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-01-28 02:55:02,298 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 188 flow [2023-01-28 02:55:02,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1106, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=188, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-01-28 02:55:02,299 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2023-01-28 02:55:02,299 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 188 flow [2023-01-28 02:55:02,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 437.0769230769231) internal successors, (5682), 13 states have internal predecessors, (5682), 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) [2023-01-28 02:55:02,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:55:02,302 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:55:02,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 02:55:02,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:55:02,510 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:55:02,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:55:02,510 INFO L85 PathProgramCache]: Analyzing trace with hash -856671419, now seen corresponding path program 2 times [2023-01-28 02:55:02,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:55:02,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203100920] [2023-01-28 02:55:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:55:02,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:55:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:55:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 02:55:02,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:55:02,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203100920] [2023-01-28 02:55:02,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203100920] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:55:02,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:55:02,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 02:55:02,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876515155] [2023-01-28 02:55:02,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:55:02,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 02:55:02,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:55:02,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 02:55:02,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 02:55:02,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 426 out of 1106 [2023-01-28 02:55:02,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 431.3333333333333) internal successors, (1294), 3 states have internal predecessors, (1294), 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) [2023-01-28 02:55:02,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:55:02,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 426 of 1106 [2023-01-28 02:55:02,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:55:02,874 INFO L130 PetriNetUnfolder]: 211/378 cut-off events. [2023-01-28 02:55:02,874 INFO L131 PetriNetUnfolder]: For 116/116 co-relation queries the response was YES. [2023-01-28 02:55:02,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 922 conditions, 378 events. 211/378 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1308 event pairs, 124 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 846. Up to 318 conditions per place. [2023-01-28 02:55:02,876 INFO L137 encePairwiseOnDemand]: 1103/1106 looper letters, 53 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-01-28 02:55:02,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 337 flow [2023-01-28 02:55:02,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 02:55:02,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 02:55:02,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1324 transitions. [2023-01-28 02:55:02,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3990355635925256 [2023-01-28 02:55:02,881 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1324 transitions. [2023-01-28 02:55:02,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1324 transitions. [2023-01-28 02:55:02,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:55:02,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1324 transitions. [2023-01-28 02:55:02,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 441.3333333333333) internal successors, (1324), 3 states have internal predecessors, (1324), 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) [2023-01-28 02:55:02,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1106.0) internal successors, (4424), 4 states have internal predecessors, (4424), 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) [2023-01-28 02:55:02,889 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1106.0) internal successors, (4424), 4 states have internal predecessors, (4424), 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) [2023-01-28 02:55:02,889 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 188 flow. Second operand 3 states and 1324 transitions. [2023-01-28 02:55:02,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 337 flow [2023-01-28 02:55:02,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 313 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-01-28 02:55:02,893 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 176 flow [2023-01-28 02:55:02,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1106, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-01-28 02:55:02,895 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2023-01-28 02:55:02,895 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 176 flow [2023-01-28 02:55:02,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 431.3333333333333) internal successors, (1294), 3 states have internal predecessors, (1294), 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) [2023-01-28 02:55:02,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:55:02,896 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:55:02,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 02:55:02,896 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:55:02,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:55:02,897 INFO L85 PathProgramCache]: Analyzing trace with hash -260660010, now seen corresponding path program 1 times [2023-01-28 02:55:02,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:55:02,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137958069] [2023-01-28 02:55:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:55:02,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:55:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:55:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 02:55:03,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:55:03,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137958069] [2023-01-28 02:55:03,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137958069] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:55:03,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:55:03,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 02:55:03,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918078239] [2023-01-28 02:55:03,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:55:03,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 02:55:03,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:55:03,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 02:55:03,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 02:55:03,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 426 out of 1106 [2023-01-28 02:55:03,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 431.3333333333333) internal successors, (1294), 3 states have internal predecessors, (1294), 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) [2023-01-28 02:55:03,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:55:03,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 426 of 1106 [2023-01-28 02:55:03,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:55:03,253 INFO L130 PetriNetUnfolder]: 325/564 cut-off events. [2023-01-28 02:55:03,253 INFO L131 PetriNetUnfolder]: For 398/398 co-relation queries the response was YES. [2023-01-28 02:55:03,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1512 conditions, 564 events. 325/564 cut-off events. For 398/398 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2003 event pairs, 167 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 1446. Up to 393 conditions per place. [2023-01-28 02:55:03,256 INFO L137 encePairwiseOnDemand]: 1102/1106 looper letters, 52 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2023-01-28 02:55:03,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 333 flow [2023-01-28 02:55:03,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 02:55:03,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 02:55:03,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1322 transitions. [2023-01-28 02:55:03,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39843279083785416 [2023-01-28 02:55:03,260 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1322 transitions. [2023-01-28 02:55:03,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1322 transitions. [2023-01-28 02:55:03,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:55:03,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1322 transitions. [2023-01-28 02:55:03,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 440.6666666666667) internal successors, (1322), 3 states have internal predecessors, (1322), 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) [2023-01-28 02:55:03,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1106.0) internal successors, (4424), 4 states have internal predecessors, (4424), 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) [2023-01-28 02:55:03,268 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1106.0) internal successors, (4424), 4 states have internal predecessors, (4424), 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) [2023-01-28 02:55:03,268 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 176 flow. Second operand 3 states and 1322 transitions. [2023-01-28 02:55:03,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 333 flow [2023-01-28 02:55:03,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 325 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-28 02:55:03,270 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 191 flow [2023-01-28 02:55:03,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1106, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-01-28 02:55:03,271 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2023-01-28 02:55:03,271 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 191 flow [2023-01-28 02:55:03,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 431.3333333333333) internal successors, (1294), 3 states have internal predecessors, (1294), 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) [2023-01-28 02:55:03,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:55:03,271 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:55:03,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 02:55:03,272 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:55:03,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:55:03,272 INFO L85 PathProgramCache]: Analyzing trace with hash -574296751, now seen corresponding path program 1 times [2023-01-28 02:55:03,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:55:03,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293751372] [2023-01-28 02:55:03,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:55:03,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:55:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:55:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-01-28 02:55:03,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:55:03,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293751372] [2023-01-28 02:55:03,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293751372] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:55:03,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:55:03,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 02:55:03,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762829179] [2023-01-28 02:55:03,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:55:03,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 02:55:03,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:55:03,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 02:55:03,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 02:55:03,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 439 out of 1106 [2023-01-28 02:55:03,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 444.6666666666667) internal successors, (1334), 3 states have internal predecessors, (1334), 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) [2023-01-28 02:55:03,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:55:03,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 439 of 1106 [2023-01-28 02:55:03,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:55:03,861 INFO L130 PetriNetUnfolder]: 259/450 cut-off events. [2023-01-28 02:55:03,862 INFO L131 PetriNetUnfolder]: For 316/316 co-relation queries the response was YES. [2023-01-28 02:55:03,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 450 events. 259/450 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1415 event pairs, 94 based on Foata normal form. 38/434 useless extension candidates. Maximal degree in co-relation 1138. Up to 419 conditions per place. [2023-01-28 02:55:03,864 INFO L137 encePairwiseOnDemand]: 1102/1106 looper letters, 43 selfloop transitions, 2 changer transitions 4/49 dead transitions. [2023-01-28 02:55:03,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 49 transitions, 314 flow [2023-01-28 02:55:03,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 02:55:03,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 02:55:03,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1355 transitions. [2023-01-28 02:55:03,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40837854128993367 [2023-01-28 02:55:03,869 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1355 transitions. [2023-01-28 02:55:03,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1355 transitions. [2023-01-28 02:55:03,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:55:03,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1355 transitions. [2023-01-28 02:55:03,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 451.6666666666667) internal successors, (1355), 3 states have internal predecessors, (1355), 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) [2023-01-28 02:55:03,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1106.0) internal successors, (4424), 4 states have internal predecessors, (4424), 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) [2023-01-28 02:55:03,877 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1106.0) internal successors, (4424), 4 states have internal predecessors, (4424), 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) [2023-01-28 02:55:03,877 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 191 flow. Second operand 3 states and 1355 transitions. [2023-01-28 02:55:03,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 49 transitions, 314 flow [2023-01-28 02:55:03,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 02:55:03,880 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 198 flow [2023-01-28 02:55:03,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1106, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-01-28 02:55:03,882 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 19 predicate places. [2023-01-28 02:55:03,883 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 198 flow [2023-01-28 02:55:03,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 444.6666666666667) internal successors, (1334), 3 states have internal predecessors, (1334), 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) [2023-01-28 02:55:03,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:55:03,883 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:55:03,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 02:55:03,884 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:55:03,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:55:03,884 INFO L85 PathProgramCache]: Analyzing trace with hash 736481309, now seen corresponding path program 1 times [2023-01-28 02:55:03,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:55:03,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513477094] [2023-01-28 02:55:03,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:55:03,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:55:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:55:08,275 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 02:55:08,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:55:08,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513477094] [2023-01-28 02:55:08,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513477094] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:55:08,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943224086] [2023-01-28 02:55:08,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:55:08,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:55:08,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:55:08,277 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:55:08,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 02:55:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:55:08,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-28 02:55:08,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:55:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 02:55:09,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:56:23,065 WARN L222 SmtUtils]: Spent 1.14m on a formula simplification. DAG size of input: 93 DAG size of output: 84 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 02:56:28,475 WARN L222 SmtUtils]: Spent 5.06s on a formula simplification that was a NOOP. DAG size: 701 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-01-28 02:56:28,476 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:56:28,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 364 treesize of output 2174 Received shutdown request... [2023-01-28 03:08:19,593 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 03:08:19,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 03:08:19,631 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 03:08:19,631 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 03:08:19,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:08:19,799 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 34 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-8-2-6-2-4-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 6 xjuncts wrt. a ∧-128-3-6-2-5-4-5-4-3-2-1 context. [2023-01-28 03:08:19,801 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 03:08:19,801 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 03:08:19,802 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1] [2023-01-28 03:08:19,805 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 03:08:19,805 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 03:08:19,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 03:08:19 BasicIcfg [2023-01-28 03:08:19,809 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 03:08:19,810 INFO L158 Benchmark]: Toolchain (without parser) took 823364.57ms. Allocated memory was 346.0MB in the beginning and 1.1GB in the end (delta: 710.9MB). Free memory was 306.6MB in the beginning and 999.3MB in the end (delta: -692.6MB). Peak memory consumption was 647.6MB. Max. memory is 16.0GB. [2023-01-28 03:08:19,810 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 213.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 03:08:19,810 INFO L158 Benchmark]: CACSL2BoogieTranslator took 267.99ms. Allocated memory is still 346.0MB. Free memory was 306.3MB in the beginning and 293.0MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-28 03:08:19,812 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.10ms. Allocated memory is still 346.0MB. Free memory was 293.0MB in the beginning and 289.7MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-01-28 03:08:19,813 INFO L158 Benchmark]: Boogie Preprocessor took 35.61ms. Allocated memory is still 346.0MB. Free memory was 289.7MB in the beginning and 287.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 03:08:19,813 INFO L158 Benchmark]: RCFGBuilder took 911.49ms. Allocated memory is still 346.0MB. Free memory was 287.0MB in the beginning and 316.2MB in the end (delta: -29.1MB). Peak memory consumption was 36.0MB. Max. memory is 16.0GB. [2023-01-28 03:08:19,814 INFO L158 Benchmark]: TraceAbstraction took 822083.94ms. Allocated memory was 346.0MB in the beginning and 1.1GB in the end (delta: 710.9MB). Free memory was 315.0MB in the beginning and 999.3MB in the end (delta: -684.3MB). Peak memory consumption was 653.6MB. Max. memory is 16.0GB. [2023-01-28 03:08:19,815 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 213.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 267.99ms. Allocated memory is still 346.0MB. Free memory was 306.3MB in the beginning and 293.0MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 58.10ms. Allocated memory is still 346.0MB. Free memory was 293.0MB in the beginning and 289.7MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 35.61ms. Allocated memory is still 346.0MB. Free memory was 289.7MB in the beginning and 287.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 911.49ms. Allocated memory is still 346.0MB. Free memory was 287.0MB in the beginning and 316.2MB in the end (delta: -29.1MB). Peak memory consumption was 36.0MB. Max. memory is 16.0GB. * TraceAbstraction took 822083.94ms. Allocated memory was 346.0MB in the beginning and 1.1GB in the end (delta: 710.9MB). Free memory was 315.0MB in the beginning and 999.3MB in the end (delta: -684.3MB). Peak memory consumption was 653.6MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 19.3s, 433 PlacesBefore, 29 PlacesAfterwards, 475 TransitionsBefore, 29 TransitionsAfterwards, 53352 CoEnabledTransitionPairs, 9 FixpointIterations, 138 TrivialSequentialCompositions, 287 ConcurrentSequentialCompositions, 25 TrivialYvCompositions, 129 ConcurrentYvCompositions, 42 ChoiceCompositions, 621 TotalNumberOfCompositions, 50280 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 48288, independent: 48169, independent conditional: 0, independent unconditional: 48169, dependent: 119, dependent conditional: 0, dependent unconditional: 119, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 32707, independent: 32685, independent conditional: 0, independent unconditional: 32685, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 48288, independent: 15484, independent conditional: 0, independent unconditional: 15484, dependent: 97, dependent conditional: 0, dependent unconditional: 97, unknown: 32707, unknown conditional: 0, unknown unconditional: 32707] , Statistics on independence cache: Total cache size (in pairs): 64, Positive cache size: 55, Positive conditional cache size: 0, Positive unconditional cache size: 55, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 128]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 34 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-8-2-6-2-4-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 6 xjuncts wrt. a ∧-128-3-6-2-5-4-5-4-3-2-1 context. - TimeoutResultAtElement [Line: 122]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 34 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-8-2-6-2-4-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 6 xjuncts wrt. a ∧-128-3-6-2-5-4-5-4-3-2-1 context. - TimeoutResultAtElement [Line: 123]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 34 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-8-2-6-2-4-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 6 xjuncts wrt. a ∧-128-3-6-2-5-4-5-4-3-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 713 locations, 3 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: 821.9s, OverallIterations: 9, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 19.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 72 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 72 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 34 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 689 IncrementalHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 34 mSolverCounterUnsat, 0 mSDtfsCounter, 689 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 147 GetRequests, 106 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=198occurred in iteration=8, InterpolantAutomatonStates: 33, 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: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 244 NumberOfCodeBlocks, 228 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 267 ConstructedInterpolants, 0 QuantifiedInterpolants, 946 SizeOfPredicates, 46 NumberOfNonLiveVariables, 776 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 184/237 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 could not prove your program: Timeout Completed graceful shutdown