/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 AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_81-list_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 08:13:10,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 08:13:10,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 08:13:10,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 08:13:10,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 08:13:10,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 08:13:10,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 08:13:10,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 08:13:10,801 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 08:13:10,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 08:13:10,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 08:13:10,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 08:13:10,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 08:13:10,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 08:13:10,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 08:13:10,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 08:13:10,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 08:13:10,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 08:13:10,816 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 08:13:10,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 08:13:10,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 08:13:10,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 08:13:10,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 08:13:10,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 08:13:10,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 08:13:10,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 08:13:10,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 08:13:10,825 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 08:13:10,825 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 08:13:10,826 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 08:13:10,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 08:13:10,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 08:13:10,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 08:13:10,827 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 08:13:10,828 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 08:13:10,828 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 08:13:10,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 08:13:10,829 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 08:13:10,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 08:13:10,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 08:13:10,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 08:13:10,835 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 08:13:10,862 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 08:13:10,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 08:13:10,863 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 08:13:10,863 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 08:13:10,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 08:13:10,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 08:13:10,864 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 08:13:10,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 08:13:10,864 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 08:13:10,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 08:13:10,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 08:13:10,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 08:13:10,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 08:13:10,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 08:13:10,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 08:13:10,865 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 08:13:10,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 08:13:10,866 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 08:13:10,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 08:13:10,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 08:13:10,866 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 08:13:10,866 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 08:13:10,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 08:13:10,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 08:13:10,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 08:13:10,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 08:13:10,867 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 08:13:10,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 08:13:10,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 08:13:10,867 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 08:13:10,867 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 08:13:10,867 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 08:13:11,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 08:13:11,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 08:13:11,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 08:13:11,096 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 08:13:11,096 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 08:13:11,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_81-list_racing.i [2023-01-28 08:13:12,105 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 08:13:12,385 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 08:13:12,386 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_81-list_racing.i [2023-01-28 08:13:12,404 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74f2bdded/d162dbd79d6a4bd789e8c0cbc150f8ff/FLAG1a9238e0b [2023-01-28 08:13:12,413 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74f2bdded/d162dbd79d6a4bd789e8c0cbc150f8ff [2023-01-28 08:13:12,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 08:13:12,416 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 08:13:12,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 08:13:12,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 08:13:12,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 08:13:12,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 08:13:12" (1/1) ... [2023-01-28 08:13:12,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3164b866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:12, skipping insertion in model container [2023-01-28 08:13:12,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 08:13:12" (1/1) ... [2023-01-28 08:13:12,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 08:13:12,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 08:13:12,720 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_81-list_racing.i[47038,47051] [2023-01-28 08:13:12,748 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 08:13:12,759 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 08:13:12,790 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_81-list_racing.i[47038,47051] [2023-01-28 08:13:12,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 08:13:12,861 INFO L208 MainTranslator]: Completed translation [2023-01-28 08:13:12,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:12 WrapperNode [2023-01-28 08:13:12,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 08:13:12,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 08:13:12,863 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 08:13:12,863 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 08:13:12,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:12" (1/1) ... [2023-01-28 08:13:12,896 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:12" (1/1) ... [2023-01-28 08:13:12,931 INFO L138 Inliner]: procedures = 278, calls = 54, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 206 [2023-01-28 08:13:12,931 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 08:13:12,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 08:13:12,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 08:13:12,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 08:13:12,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:12" (1/1) ... [2023-01-28 08:13:12,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:12" (1/1) ... [2023-01-28 08:13:12,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:12" (1/1) ... [2023-01-28 08:13:12,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:12" (1/1) ... [2023-01-28 08:13:12,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:12" (1/1) ... [2023-01-28 08:13:12,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:12" (1/1) ... [2023-01-28 08:13:12,978 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:12" (1/1) ... [2023-01-28 08:13:12,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:12" (1/1) ... [2023-01-28 08:13:12,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 08:13:12,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 08:13:12,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 08:13:12,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 08:13:12,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:12" (1/1) ... [2023-01-28 08:13:12,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 08:13:12,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:13:13,042 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 08:13:13,052 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 08:13:13,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 08:13:13,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-01-28 08:13:13,075 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-01-28 08:13:13,075 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-01-28 08:13:13,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 08:13:13,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 08:13:13,076 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-01-28 08:13:13,076 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-01-28 08:13:13,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 08:13:13,076 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 08:13:13,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 08:13:13,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 08:13:13,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-01-28 08:13:13,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 08:13:13,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 08:13:13,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 08:13:13,077 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 08:13:13,245 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 08:13:13,247 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 08:13:13,513 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 08:13:13,518 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 08:13:13,518 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-01-28 08:13:13,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 08:13:13 BoogieIcfgContainer [2023-01-28 08:13:13,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 08:13:13,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 08:13:13,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 08:13:13,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 08:13:13,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 08:13:12" (1/3) ... [2023-01-28 08:13:13,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@417c573a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 08:13:13, skipping insertion in model container [2023-01-28 08:13:13,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:12" (2/3) ... [2023-01-28 08:13:13,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@417c573a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 08:13:13, skipping insertion in model container [2023-01-28 08:13:13,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 08:13:13" (3/3) ... [2023-01-28 08:13:13,525 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_81-list_racing.i [2023-01-28 08:13:13,535 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 08:13:13,536 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 08:13:13,536 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 08:13:13,610 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-28 08:13:13,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 209 transitions, 440 flow [2023-01-28 08:13:13,792 INFO L130 PetriNetUnfolder]: 52/398 cut-off events. [2023-01-28 08:13:13,793 INFO L131 PetriNetUnfolder]: For 8/15 co-relation queries the response was YES. [2023-01-28 08:13:13,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 398 events. 52/398 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1606 event pairs, 0 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 205. Up to 8 conditions per place. [2023-01-28 08:13:13,799 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 209 transitions, 440 flow [2023-01-28 08:13:13,803 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 206 transitions, 426 flow [2023-01-28 08:13:13,806 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 08:13:13,816 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 206 transitions, 426 flow [2023-01-28 08:13:13,818 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 206 transitions, 426 flow [2023-01-28 08:13:13,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 206 transitions, 426 flow [2023-01-28 08:13:13,862 INFO L130 PetriNetUnfolder]: 48/385 cut-off events. [2023-01-28 08:13:13,863 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 08:13:13,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 385 events. 48/385 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1511 event pairs, 0 based on Foata normal form. 0/324 useless extension candidates. Maximal degree in co-relation 193. Up to 8 conditions per place. [2023-01-28 08:13:13,872 INFO L119 LiptonReduction]: Number of co-enabled transitions 12518 [2023-01-28 08:13:18,802 INFO L134 LiptonReduction]: Checked pairs total: 22830 [2023-01-28 08:13:18,802 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-01-28 08:13:18,821 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 08:13:18,825 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;@1ca58fb9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 08:13:18,825 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-28 08:13:18,831 INFO L130 PetriNetUnfolder]: 7/59 cut-off events. [2023-01-28 08:13:18,831 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 08:13:18,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:13:18,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:13:18,832 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 08:13:18,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:13:18,835 INFO L85 PathProgramCache]: Analyzing trace with hash -575739965, now seen corresponding path program 1 times [2023-01-28 08:13:18,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:13:18,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610630162] [2023-01-28 08:13:18,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:13:18,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:13:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:13:19,110 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 08:13:19,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:13:19,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610630162] [2023-01-28 08:13:19,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610630162] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:13:19,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 08:13:19,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 08:13:19,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857633932] [2023-01-28 08:13:19,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:13:19,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 08:13:19,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:13:19,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 08:13:19,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 08:13:19,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 376 [2023-01-28 08:13:19,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 59 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 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 08:13:19,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:13:19,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 376 [2023-01-28 08:13:19,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:13:19,512 INFO L130 PetriNetUnfolder]: 2607/4297 cut-off events. [2023-01-28 08:13:19,513 INFO L131 PetriNetUnfolder]: For 95/95 co-relation queries the response was YES. [2023-01-28 08:13:19,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8429 conditions, 4297 events. 2607/4297 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 23270 event pairs, 1395 based on Foata normal form. 240/3795 useless extension candidates. Maximal degree in co-relation 7741. Up to 4056 conditions per place. [2023-01-28 08:13:19,534 INFO L137 encePairwiseOnDemand]: 362/376 looper letters, 36 selfloop transitions, 2 changer transitions 15/56 dead transitions. [2023-01-28 08:13:19,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 56 transitions, 228 flow [2023-01-28 08:13:19,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 08:13:19,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 08:13:19,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 600 transitions. [2023-01-28 08:13:19,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2023-01-28 08:13:19,548 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 600 transitions. [2023-01-28 08:13:19,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 600 transitions. [2023-01-28 08:13:19,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:13:19,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 600 transitions. [2023-01-28 08:13:19,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 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 08:13:19,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 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 08:13:19,562 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 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 08:13:19,564 INFO L175 Difference]: Start difference. First operand has 49 places, 59 transitions, 132 flow. Second operand 3 states and 600 transitions. [2023-01-28 08:13:19,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 56 transitions, 228 flow [2023-01-28 08:13:19,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 225 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 08:13:19,570 INFO L231 Difference]: Finished difference. Result has 51 places, 34 transitions, 87 flow [2023-01-28 08:13:19,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=51, PETRI_TRANSITIONS=34} [2023-01-28 08:13:19,573 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-01-28 08:13:19,574 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 34 transitions, 87 flow [2023-01-28 08:13:19,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 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 08:13:19,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:13:19,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:13:19,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 08:13:19,574 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 08:13:19,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:13:19,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1468372479, now seen corresponding path program 1 times [2023-01-28 08:13:19,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:13:19,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362313440] [2023-01-28 08:13:19,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:13:19,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:13:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:13:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:13:19,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:13:19,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362313440] [2023-01-28 08:13:19,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362313440] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:13:19,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366466254] [2023-01-28 08:13:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:13:19,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:13:19,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:13:19,737 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 08:13:19,773 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 08:13:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:13:19,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 08:13:19,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:13:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:13:19,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:13:19,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:13:19,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366466254] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:13:19,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:13:19,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 08:13:19,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657811743] [2023-01-28 08:13:19,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:13:19,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 08:13:19,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:13:19,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 08:13:19,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 08:13:19,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 376 [2023-01-28 08:13:19,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 34 transitions, 87 flow. Second operand has 7 states, 7 states have (on average 182.0) internal successors, (1274), 7 states have internal predecessors, (1274), 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 08:13:19,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:13:19,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 376 [2023-01-28 08:13:19,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:13:19,974 INFO L130 PetriNetUnfolder]: 14/41 cut-off events. [2023-01-28 08:13:19,974 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 08:13:19,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 41 events. 14/41 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 0 based on Foata normal form. 8/49 useless extension candidates. Maximal degree in co-relation 99. Up to 30 conditions per place. [2023-01-28 08:13:19,975 INFO L137 encePairwiseOnDemand]: 373/376 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2023-01-28 08:13:19,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 20 transitions, 86 flow [2023-01-28 08:13:19,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 08:13:19,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 08:13:19,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 736 transitions. [2023-01-28 08:13:19,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2023-01-28 08:13:19,982 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 736 transitions. [2023-01-28 08:13:19,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 736 transitions. [2023-01-28 08:13:19,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:13:19,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 736 transitions. [2023-01-28 08:13:19,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 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 08:13:19,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 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 08:13:19,986 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 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 08:13:19,986 INFO L175 Difference]: Start difference. First operand has 51 places, 34 transitions, 87 flow. Second operand 4 states and 736 transitions. [2023-01-28 08:13:19,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 20 transitions, 86 flow [2023-01-28 08:13:19,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 20 transitions, 80 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 08:13:19,987 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-01-28 08:13:19,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-01-28 08:13:19,988 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -31 predicate places. [2023-01-28 08:13:19,988 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-01-28 08:13:19,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 182.0) internal successors, (1274), 7 states have internal predecessors, (1274), 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 08:13:19,990 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-01-28 08:13:19,991 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-28 08:13:19,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-28 08:13:20,195 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 08:13:20,196 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 08:13:20,198 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-01-28 08:13:20,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 209 transitions, 440 flow [2023-01-28 08:13:20,241 INFO L130 PetriNetUnfolder]: 52/398 cut-off events. [2023-01-28 08:13:20,241 INFO L131 PetriNetUnfolder]: For 8/15 co-relation queries the response was YES. [2023-01-28 08:13:20,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 398 events. 52/398 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1606 event pairs, 0 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 205. Up to 8 conditions per place. [2023-01-28 08:13:20,242 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 209 transitions, 440 flow [2023-01-28 08:13:20,244 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 207 transitions, 430 flow [2023-01-28 08:13:20,244 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 08:13:20,244 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 207 transitions, 430 flow [2023-01-28 08:13:20,244 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 207 transitions, 430 flow [2023-01-28 08:13:20,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 207 transitions, 430 flow [2023-01-28 08:13:20,269 INFO L130 PetriNetUnfolder]: 48/386 cut-off events. [2023-01-28 08:13:20,269 INFO L131 PetriNetUnfolder]: For 4/7 co-relation queries the response was YES. [2023-01-28 08:13:20,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 386 events. 48/386 cut-off events. For 4/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1533 event pairs, 0 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 193. Up to 8 conditions per place. [2023-01-28 08:13:20,277 INFO L119 LiptonReduction]: Number of co-enabled transitions 12564 [2023-01-28 08:13:25,448 INFO L134 LiptonReduction]: Checked pairs total: 23006 [2023-01-28 08:13:25,448 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-01-28 08:13:25,453 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 08:13:25,456 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;@1ca58fb9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 08:13:25,456 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-28 08:13:25,459 INFO L130 PetriNetUnfolder]: 2/24 cut-off events. [2023-01-28 08:13:25,459 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 08:13:25,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:13:25,460 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-28 08:13:25,460 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:13:25,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:13:25,460 INFO L85 PathProgramCache]: Analyzing trace with hash -885258072, now seen corresponding path program 1 times [2023-01-28 08:13:25,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:13:25,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934541150] [2023-01-28 08:13:25,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:13:25,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:13:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 08:13:25,519 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 08:13:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 08:13:25,547 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 08:13:25,547 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 08:13:25,547 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-28 08:13:25,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-01-28 08:13:25,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 08:13:25,548 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 08:13:25,551 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-01-28 08:13:25,551 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 08:13:25,551 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 08:13:25,605 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-01-28 08:13:25,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 323 transitions, 694 flow [2023-01-28 08:13:25,719 INFO L130 PetriNetUnfolder]: 191/1179 cut-off events. [2023-01-28 08:13:25,719 INFO L131 PetriNetUnfolder]: For 72/95 co-relation queries the response was YES. [2023-01-28 08:13:25,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 1179 events. 191/1179 cut-off events. For 72/95 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7280 event pairs, 2 based on Foata normal form. 0/992 useless extension candidates. Maximal degree in co-relation 745. Up to 32 conditions per place. [2023-01-28 08:13:25,729 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 323 transitions, 694 flow [2023-01-28 08:13:25,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 289 places, 322 transitions, 688 flow [2023-01-28 08:13:25,736 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 08:13:25,736 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 289 places, 322 transitions, 688 flow [2023-01-28 08:13:25,737 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 289 places, 322 transitions, 688 flow [2023-01-28 08:13:25,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 289 places, 322 transitions, 688 flow [2023-01-28 08:13:25,841 INFO L130 PetriNetUnfolder]: 191/1178 cut-off events. [2023-01-28 08:13:25,842 INFO L131 PetriNetUnfolder]: For 71/87 co-relation queries the response was YES. [2023-01-28 08:13:25,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1273 conditions, 1178 events. 191/1178 cut-off events. For 71/87 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7319 event pairs, 2 based on Foata normal form. 0/991 useless extension candidates. Maximal degree in co-relation 745. Up to 32 conditions per place. [2023-01-28 08:13:25,887 INFO L119 LiptonReduction]: Number of co-enabled transitions 51320 [2023-01-28 08:13:31,546 INFO L134 LiptonReduction]: Checked pairs total: 111515 [2023-01-28 08:13:31,546 INFO L136 LiptonReduction]: Total number of compositions: 250 [2023-01-28 08:13:31,548 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 08:13:31,548 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;@1ca58fb9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 08:13:31,548 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 08:13:31,552 INFO L130 PetriNetUnfolder]: 5/58 cut-off events. [2023-01-28 08:13:31,552 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 08:13:31,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:13:31,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:13:31,552 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 08:13:31,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:13:31,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1536489628, now seen corresponding path program 1 times [2023-01-28 08:13:31,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:13:31,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576517168] [2023-01-28 08:13:31,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:13:31,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:13:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:13:31,609 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 08:13:31,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:13:31,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576517168] [2023-01-28 08:13:31,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576517168] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:13:31,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 08:13:31,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 08:13:31,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673677921] [2023-01-28 08:13:31,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:13:31,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 08:13:31,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:13:31,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 08:13:31,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 08:13:31,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 573 [2023-01-28 08:13:31,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 111 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 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 08:13:31,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:13:31,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 573 [2023-01-28 08:13:31,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:14:39,504 INFO L130 PetriNetUnfolder]: 783305/1049221 cut-off events. [2023-01-28 08:14:39,504 INFO L131 PetriNetUnfolder]: For 44788/44788 co-relation queries the response was YES. [2023-01-28 08:14:41,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2057276 conditions, 1049221 events. 783305/1049221 cut-off events. For 44788/44788 co-relation queries the response was YES. Maximal size of possible extension queue 20990. Compared 8033382 event pairs, 546616 based on Foata normal form. 84048/984157 useless extension candidates. Maximal degree in co-relation 325052. Up to 987090 conditions per place. [2023-01-28 08:14:43,621 INFO L137 encePairwiseOnDemand]: 548/573 looper letters, 81 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-01-28 08:14:43,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 98 transitions, 406 flow [2023-01-28 08:14:43,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 08:14:43,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 08:14:43,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 928 transitions. [2023-01-28 08:14:43,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.539848749272833 [2023-01-28 08:14:43,624 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 928 transitions. [2023-01-28 08:14:43,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 928 transitions. [2023-01-28 08:14:43,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:14:43,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 928 transitions. [2023-01-28 08:14:43,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 309.3333333333333) internal successors, (928), 3 states have internal predecessors, (928), 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 08:14:43,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 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 08:14:43,629 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 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 08:14:43,629 INFO L175 Difference]: Start difference. First operand has 86 places, 111 transitions, 266 flow. Second operand 3 states and 928 transitions. [2023-01-28 08:14:43,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 98 transitions, 406 flow [2023-01-28 08:14:43,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 98 transitions, 403 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 08:14:43,826 INFO L231 Difference]: Finished difference. Result has 88 places, 90 transitions, 231 flow [2023-01-28 08:14:43,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=231, PETRI_PLACES=88, PETRI_TRANSITIONS=90} [2023-01-28 08:14:43,826 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2023-01-28 08:14:43,827 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 90 transitions, 231 flow [2023-01-28 08:14:43,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 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 08:14:43,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:14:43,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:14:43,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 08:14:43,827 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 08:14:43,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:14:43,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1383156469, now seen corresponding path program 1 times [2023-01-28 08:14:43,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:14:43,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862232168] [2023-01-28 08:14:43,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:14:43,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:14:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:14:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:14:43,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:14:43,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862232168] [2023-01-28 08:14:43,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862232168] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:14:43,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374915446] [2023-01-28 08:14:43,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:14:43,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:14:43,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:14:43,869 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 08:14:43,893 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 08:14:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:14:44,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 08:14:44,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:14:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:14:44,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:14:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:14:44,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374915446] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:14:44,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:14:44,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 08:14:44,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396459255] [2023-01-28 08:14:44,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:14:44,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 08:14:44,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:14:44,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 08:14:44,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 08:14:44,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 573 [2023-01-28 08:14:44,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 90 transitions, 231 flow. Second operand has 7 states, 7 states have (on average 277.14285714285717) internal successors, (1940), 7 states have internal predecessors, (1940), 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 08:14:44,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:14:44,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 573 [2023-01-28 08:14:44,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:14:44,118 INFO L130 PetriNetUnfolder]: 257/477 cut-off events. [2023-01-28 08:14:44,118 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2023-01-28 08:14:44,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1027 conditions, 477 events. 257/477 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2012 event pairs, 0 based on Foata normal form. 64/541 useless extension candidates. Maximal degree in co-relation 1019. Up to 306 conditions per place. [2023-01-28 08:14:44,119 INFO L137 encePairwiseOnDemand]: 570/573 looper letters, 0 selfloop transitions, 0 changer transitions 45/45 dead transitions. [2023-01-28 08:14:44,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 45 transitions, 187 flow [2023-01-28 08:14:44,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 08:14:44,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 08:14:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1413 transitions. [2023-01-28 08:14:44,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931937172774869 [2023-01-28 08:14:44,124 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1413 transitions. [2023-01-28 08:14:44,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1413 transitions. [2023-01-28 08:14:44,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:14:44,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1413 transitions. [2023-01-28 08:14:44,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 282.6) internal successors, (1413), 5 states have internal predecessors, (1413), 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 08:14:44,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 573.0) internal successors, (3438), 6 states have internal predecessors, (3438), 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 08:14:44,134 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 573.0) internal successors, (3438), 6 states have internal predecessors, (3438), 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 08:14:44,134 INFO L175 Difference]: Start difference. First operand has 88 places, 90 transitions, 231 flow. Second operand 5 states and 1413 transitions. [2023-01-28 08:14:44,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 45 transitions, 187 flow [2023-01-28 08:14:44,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 45 transitions, 185 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 08:14:44,136 INFO L231 Difference]: Finished difference. Result has 34 places, 0 transitions, 0 flow [2023-01-28 08:14:44,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=34, PETRI_TRANSITIONS=0} [2023-01-28 08:14:44,136 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -52 predicate places. [2023-01-28 08:14:44,136 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 0 transitions, 0 flow [2023-01-28 08:14:44,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 277.14285714285717) internal successors, (1940), 7 states have internal predecessors, (1940), 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 08:14:44,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 08:14:44,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-01-28 08:14:44,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-01-28 08:14:44,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-28 08:14:44,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:14:44,345 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 08:14:44,346 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-01-28 08:14:44,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 323 transitions, 694 flow [2023-01-28 08:14:44,490 INFO L130 PetriNetUnfolder]: 191/1179 cut-off events. [2023-01-28 08:14:44,490 INFO L131 PetriNetUnfolder]: For 72/95 co-relation queries the response was YES. [2023-01-28 08:14:44,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 1179 events. 191/1179 cut-off events. For 72/95 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7280 event pairs, 2 based on Foata normal form. 0/992 useless extension candidates. Maximal degree in co-relation 745. Up to 32 conditions per place. [2023-01-28 08:14:44,505 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 323 transitions, 694 flow [2023-01-28 08:14:44,511 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 290 places, 323 transitions, 694 flow [2023-01-28 08:14:44,511 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 08:14:44,511 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 290 places, 323 transitions, 694 flow [2023-01-28 08:14:44,512 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 290 places, 323 transitions, 694 flow [2023-01-28 08:14:44,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 323 transitions, 694 flow [2023-01-28 08:14:44,793 INFO L130 PetriNetUnfolder]: 191/1179 cut-off events. [2023-01-28 08:14:44,793 INFO L131 PetriNetUnfolder]: For 72/95 co-relation queries the response was YES. [2023-01-28 08:14:44,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 1179 events. 191/1179 cut-off events. For 72/95 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7280 event pairs, 2 based on Foata normal form. 0/992 useless extension candidates. Maximal degree in co-relation 745. Up to 32 conditions per place. [2023-01-28 08:14:44,849 INFO L119 LiptonReduction]: Number of co-enabled transitions 51412 [2023-01-28 08:14:50,008 INFO L134 LiptonReduction]: Checked pairs total: 111858 [2023-01-28 08:14:50,008 INFO L136 LiptonReduction]: Total number of compositions: 251 [2023-01-28 08:14:50,025 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 08:14:50,025 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;@1ca58fb9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 08:14:50,025 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-28 08:14:50,030 INFO L130 PetriNetUnfolder]: 17/104 cut-off events. [2023-01-28 08:14:50,031 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 08:14:50,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:14:50,031 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-28 08:14:50,031 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:14:50,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:14:50,031 INFO L85 PathProgramCache]: Analyzing trace with hash -2014292715, now seen corresponding path program 1 times [2023-01-28 08:14:50,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:14:50,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418599479] [2023-01-28 08:14:50,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:14:50,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:14:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 08:14:50,063 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 08:14:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 08:14:50,084 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 08:14:50,085 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 08:14:50,085 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-28 08:14:50,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-01-28 08:14:50,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 08:14:50,085 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 08:14:50,086 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-01-28 08:14:50,086 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 08:14:50,086 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 08:14:50,132 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-01-28 08:14:50,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 389 places, 437 transitions, 952 flow [2023-01-28 08:14:50,648 INFO L130 PetriNetUnfolder]: 664/3284 cut-off events. [2023-01-28 08:14:50,648 INFO L131 PetriNetUnfolder]: For 419/462 co-relation queries the response was YES. [2023-01-28 08:14:50,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3735 conditions, 3284 events. 664/3284 cut-off events. For 419/462 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 24950 event pairs, 64 based on Foata normal form. 0/2791 useless extension candidates. Maximal degree in co-relation 2153. Up to 192 conditions per place. [2023-01-28 08:14:50,695 INFO L82 GeneralOperation]: Start removeDead. Operand has 389 places, 437 transitions, 952 flow [2023-01-28 08:14:50,718 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 388 places, 436 transitions, 944 flow [2023-01-28 08:14:50,719 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 08:14:50,719 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 388 places, 436 transitions, 944 flow [2023-01-28 08:14:50,719 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 388 places, 436 transitions, 944 flow [2023-01-28 08:14:50,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 388 places, 436 transitions, 944 flow [2023-01-28 08:14:51,166 INFO L130 PetriNetUnfolder]: 664/3283 cut-off events. [2023-01-28 08:14:51,166 INFO L131 PetriNetUnfolder]: For 416/452 co-relation queries the response was YES. [2023-01-28 08:14:51,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3731 conditions, 3283 events. 664/3283 cut-off events. For 416/452 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 24958 event pairs, 64 based on Foata normal form. 0/2790 useless extension candidates. Maximal degree in co-relation 2153. Up to 192 conditions per place. [2023-01-28 08:14:51,366 INFO L119 LiptonReduction]: Number of co-enabled transitions 115026 [2023-01-28 08:14:57,273 INFO L134 LiptonReduction]: Checked pairs total: 254043 [2023-01-28 08:14:57,273 INFO L136 LiptonReduction]: Total number of compositions: 331 [2023-01-28 08:14:57,275 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 08:14:57,278 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;@1ca58fb9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 08:14:57,278 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 08:14:57,283 INFO L130 PetriNetUnfolder]: 5/57 cut-off events. [2023-01-28 08:14:57,283 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 08:14:57,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:14:57,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:14:57,283 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:14:57,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:14:57,285 INFO L85 PathProgramCache]: Analyzing trace with hash 631681586, now seen corresponding path program 1 times [2023-01-28 08:14:57,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:14:57,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804230230] [2023-01-28 08:14:57,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:14:57,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:14:57,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:14:57,334 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 08:14:57,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:14:57,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804230230] [2023-01-28 08:14:57,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804230230] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:14:57,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 08:14:57,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 08:14:57,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688925936] [2023-01-28 08:14:57,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:14:57,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 08:14:57,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:14:57,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 08:14:57,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 08:14:57,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 768 [2023-01-28 08:14:57,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 158 transitions, 388 flow. Second operand has 3 states, 3 states have (on average 371.6666666666667) internal successors, (1115), 3 states have internal predecessors, (1115), 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 08:14:57,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:14:57,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 768 [2023-01-28 08:14:57,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand