/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/weaver/popl20-more-max-array.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 10:57:55,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 10:57:55,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 10:57:55,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 10:57:55,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 10:57:55,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 10:57:55,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 10:57:55,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 10:57:55,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 10:57:55,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 10:57:55,872 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 10:57:55,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 10:57:55,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 10:57:55,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 10:57:55,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 10:57:55,880 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 10:57:55,881 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 10:57:55,881 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 10:57:55,882 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 10:57:55,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 10:57:55,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 10:57:55,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 10:57:55,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 10:57:55,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 10:57:55,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 10:57:55,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 10:57:55,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 10:57:55,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 10:57:55,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 10:57:55,905 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 10:57:55,905 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 10:57:55,905 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 10:57:55,905 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 10:57:55,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 10:57:55,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 10:57:55,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 10:57:55,909 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 10:57:55,933 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 10:57:55,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 10:57:55,935 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 10:57:55,935 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 10:57:55,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 10:57:55,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 10:57:55,935 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 10:57:55,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 10:57:55,936 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 10:57:55,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 10:57:55,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 10:57:55,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 10:57:55,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 10:57:55,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 10:57:55,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 10:57:55,937 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 10:57:55,937 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 10:57:55,937 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 10:57:55,937 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 10:57:55,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 10:57:55,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 10:57:55,937 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 10:57:55,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 10:57:55,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 10:57:55,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 10:57:55,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 10:57:55,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 10:57:55,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 10:57:55,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 10:57:55,938 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 10:57:55,938 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 10:57:55,938 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 10:57:56,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 10:57:56,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 10:57:56,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 10:57:56,147 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 10:57:56,149 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 10:57:56,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c [2023-01-28 10:57:57,190 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 10:57:57,337 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 10:57:57,337 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c [2023-01-28 10:57:57,341 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c03f4ec77/49f7622b38a442e0bff3be7e84d8846d/FLAG1eeab7ac9 [2023-01-28 10:57:57,350 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c03f4ec77/49f7622b38a442e0bff3be7e84d8846d [2023-01-28 10:57:57,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 10:57:57,353 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 10:57:57,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 10:57:57,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 10:57:57,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 10:57:57,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 10:57:57" (1/1) ... [2023-01-28 10:57:57,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39fa9f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:57:57, skipping insertion in model container [2023-01-28 10:57:57,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 10:57:57" (1/1) ... [2023-01-28 10:57:57,361 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 10:57:57,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 10:57:57,490 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/popl20-more-max-array.wvr.c[2553,2566] [2023-01-28 10:57:57,498 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 10:57:57,504 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 10:57:57,519 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/popl20-more-max-array.wvr.c[2553,2566] [2023-01-28 10:57:57,524 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 10:57:57,530 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 10:57:57,530 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 10:57:57,535 INFO L208 MainTranslator]: Completed translation [2023-01-28 10:57:57,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:57:57 WrapperNode [2023-01-28 10:57:57,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 10:57:57,536 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 10:57:57,536 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 10:57:57,536 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 10:57:57,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:57:57" (1/1) ... [2023-01-28 10:57:57,546 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:57:57" (1/1) ... [2023-01-28 10:57:57,567 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 104 [2023-01-28 10:57:57,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 10:57:57,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 10:57:57,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 10:57:57,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 10:57:57,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:57:57" (1/1) ... [2023-01-28 10:57:57,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:57:57" (1/1) ... [2023-01-28 10:57:57,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:57:57" (1/1) ... [2023-01-28 10:57:57,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:57:57" (1/1) ... [2023-01-28 10:57:57,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:57:57" (1/1) ... [2023-01-28 10:57:57,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:57:57" (1/1) ... [2023-01-28 10:57:57,585 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:57:57" (1/1) ... [2023-01-28 10:57:57,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:57:57" (1/1) ... [2023-01-28 10:57:57,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 10:57:57,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 10:57:57,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 10:57:57,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 10:57:57,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:57:57" (1/1) ... [2023-01-28 10:57:57,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 10:57:57,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:57:57,633 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 10:57:57,635 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 10:57:57,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 10:57:57,660 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 10:57:57,660 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 10:57:57,660 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 10:57:57,660 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 10:57:57,660 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-28 10:57:57,660 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-28 10:57:57,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 10:57:57,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 10:57:57,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 10:57:57,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 10:57:57,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 10:57:57,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 10:57:57,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 10:57:57,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 10:57:57,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 10:57:57,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 10:57:57,662 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 10:57:57,727 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 10:57:57,728 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 10:57:57,944 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 10:57:57,990 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 10:57:57,990 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-01-28 10:57:57,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 10:57:57 BoogieIcfgContainer [2023-01-28 10:57:57,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 10:57:57,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 10:57:57,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 10:57:57,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 10:57:57,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 10:57:57" (1/3) ... [2023-01-28 10:57:57,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eeaf014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 10:57:57, skipping insertion in model container [2023-01-28 10:57:57,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:57:57" (2/3) ... [2023-01-28 10:57:57,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eeaf014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 10:57:57, skipping insertion in model container [2023-01-28 10:57:57,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 10:57:57" (3/3) ... [2023-01-28 10:57:57,997 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array.wvr.c [2023-01-28 10:57:58,016 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 10:57:58,016 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 10:57:58,016 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 10:57:58,072 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 10:57:58,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 144 transitions, 312 flow [2023-01-28 10:57:58,140 INFO L130 PetriNetUnfolder]: 12/141 cut-off events. [2023-01-28 10:57:58,140 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 10:57:58,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 141 events. 12/141 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 88 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-01-28 10:57:58,144 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 144 transitions, 312 flow [2023-01-28 10:57:58,147 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 131 transitions, 280 flow [2023-01-28 10:57:58,149 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 10:57:58,155 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 131 transitions, 280 flow [2023-01-28 10:57:58,163 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 131 transitions, 280 flow [2023-01-28 10:57:58,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 131 transitions, 280 flow [2023-01-28 10:57:58,202 INFO L130 PetriNetUnfolder]: 12/131 cut-off events. [2023-01-28 10:57:58,203 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 10:57:58,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 131 events. 12/131 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 89 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-01-28 10:57:58,204 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2023-01-28 10:58:01,681 INFO L134 LiptonReduction]: Checked pairs total: 1615 [2023-01-28 10:58:01,682 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-01-28 10:58:01,703 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 10:58:01,724 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;@74576a55, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 10:58:01,725 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 10:58:01,736 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2023-01-28 10:58:01,736 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 10:58:01,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:01,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:58:01,738 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:01,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:01,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1107178468, now seen corresponding path program 1 times [2023-01-28 10:58:01,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:01,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844407060] [2023-01-28 10:58:01,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:01,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:01,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:02,360 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 10:58:02,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:02,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844407060] [2023-01-28 10:58:02,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844407060] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:58:02,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:58:02,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 10:58:02,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515716715] [2023-01-28 10:58:02,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:58:02,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 10:58:02,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:02,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 10:58:02,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 10:58:02,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 273 [2023-01-28 10:58:02,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 5 states, 5 states have (on average 103.6) internal successors, (518), 5 states have internal predecessors, (518), 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 10:58:02,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:02,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 273 [2023-01-28 10:58:02,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:02,658 INFO L130 PetriNetUnfolder]: 679/943 cut-off events. [2023-01-28 10:58:02,658 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-01-28 10:58:02,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1970 conditions, 943 events. 679/943 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3493 event pairs, 265 based on Foata normal form. 0/618 useless extension candidates. Maximal degree in co-relation 765. Up to 370 conditions per place. [2023-01-28 10:58:02,665 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 55 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2023-01-28 10:58:02,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 65 transitions, 304 flow [2023-01-28 10:58:02,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:58:02,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:58:02,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 765 transitions. [2023-01-28 10:58:02,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4003139717425432 [2023-01-28 10:58:02,694 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 765 transitions. [2023-01-28 10:58:02,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 765 transitions. [2023-01-28 10:58:02,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:02,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 765 transitions. [2023-01-28 10:58:02,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 109.28571428571429) internal successors, (765), 7 states have internal predecessors, (765), 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 10:58:02,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 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 10:58:02,730 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 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 10:58:02,731 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 7 states and 765 transitions. [2023-01-28 10:58:02,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 65 transitions, 304 flow [2023-01-28 10:58:02,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 65 transitions, 272 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-28 10:58:02,736 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 97 flow [2023-01-28 10:58:02,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=97, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2023-01-28 10:58:02,740 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-01-28 10:58:02,740 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 97 flow [2023-01-28 10:58:02,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.6) internal successors, (518), 5 states have internal predecessors, (518), 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 10:58:02,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:02,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:58:02,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 10:58:02,741 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:02,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:02,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1966737023, now seen corresponding path program 1 times [2023-01-28 10:58:02,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:02,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710725288] [2023-01-28 10:58:02,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:02,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:02,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:02,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710725288] [2023-01-28 10:58:02,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710725288] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:58:02,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:58:02,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 10:58:02,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228612932] [2023-01-28 10:58:02,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:58:02,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 10:58:02,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:02,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 10:58:02,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 10:58:02,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 273 [2023-01-28 10:58:02,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 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 10:58:02,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:02,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 273 [2023-01-28 10:58:02,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:02,928 INFO L130 PetriNetUnfolder]: 342/475 cut-off events. [2023-01-28 10:58:02,928 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2023-01-28 10:58:02,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 475 events. 342/475 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1468 event pairs, 133 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 1137. Up to 371 conditions per place. [2023-01-28 10:58:02,931 INFO L137 encePairwiseOnDemand]: 269/273 looper letters, 30 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-01-28 10:58:02,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 168 flow [2023-01-28 10:58:02,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 10:58:02,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 10:58:02,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 433 transitions. [2023-01-28 10:58:02,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3965201465201465 [2023-01-28 10:58:02,934 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 433 transitions. [2023-01-28 10:58:02,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 433 transitions. [2023-01-28 10:58:02,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:02,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 433 transitions. [2023-01-28 10:58:02,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.25) internal successors, (433), 4 states have internal predecessors, (433), 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 10:58:02,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 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 10:58:02,937 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 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 10:58:02,937 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 97 flow. Second operand 4 states and 433 transitions. [2023-01-28 10:58:02,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 168 flow [2023-01-28 10:58:02,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 157 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-28 10:58:02,940 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 77 flow [2023-01-28 10:58:02,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=77, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-01-28 10:58:02,940 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-01-28 10:58:02,940 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 77 flow [2023-01-28 10:58:02,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 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 10:58:02,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:02,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:58:02,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 10:58:02,941 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:02,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:02,941 INFO L85 PathProgramCache]: Analyzing trace with hash -805618038, now seen corresponding path program 1 times [2023-01-28 10:58:02,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:02,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078007500] [2023-01-28 10:58:02,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:02,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:03,009 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 10:58:03,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:03,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078007500] [2023-01-28 10:58:03,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078007500] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:03,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633884126] [2023-01-28 10:58:03,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:03,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:03,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:58:03,012 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 10:58:03,034 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 10:58:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:03,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:58:03,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:58:03,154 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 10:58:03,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:58:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:03,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633884126] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:03,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 10:58:03,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-01-28 10:58:03,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032455975] [2023-01-28 10:58:03,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:58:03,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 10:58:03,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:03,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 10:58:03,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-01-28 10:58:03,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 273 [2023-01-28 10:58:03,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 77 flow. Second operand has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 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 10:58:03,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:03,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 273 [2023-01-28 10:58:03,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:03,247 INFO L130 PetriNetUnfolder]: 311/453 cut-off events. [2023-01-28 10:58:03,247 INFO L131 PetriNetUnfolder]: For 117/143 co-relation queries the response was YES. [2023-01-28 10:58:03,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1028 conditions, 453 events. 311/453 cut-off events. For 117/143 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1443 event pairs, 73 based on Foata normal form. 26/371 useless extension candidates. Maximal degree in co-relation 1011. Up to 349 conditions per place. [2023-01-28 10:58:03,250 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 31 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2023-01-28 10:58:03,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 177 flow [2023-01-28 10:58:03,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:58:03,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:58:03,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 554 transitions. [2023-01-28 10:58:03,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40586080586080586 [2023-01-28 10:58:03,251 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 554 transitions. [2023-01-28 10:58:03,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 554 transitions. [2023-01-28 10:58:03,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:03,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 554 transitions. [2023-01-28 10:58:03,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 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 10:58:03,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 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 10:58:03,255 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 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 10:58:03,255 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 77 flow. Second operand 5 states and 554 transitions. [2023-01-28 10:58:03,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 177 flow [2023-01-28 10:58:03,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 171 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 10:58:03,256 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 88 flow [2023-01-28 10:58:03,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2023-01-28 10:58:03,257 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-01-28 10:58:03,257 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 88 flow [2023-01-28 10:58:03,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 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 10:58:03,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:03,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:58:03,288 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 10:58:03,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:03,477 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:03,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:03,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1619003621, now seen corresponding path program 1 times [2023-01-28 10:58:03,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:03,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660741345] [2023-01-28 10:58:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:03,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:04,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:04,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660741345] [2023-01-28 10:58:04,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660741345] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:04,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524364406] [2023-01-28 10:58:04,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:04,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:04,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:58:04,087 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 10:58:04,087 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 10:58:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:04,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 10:58:04,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:58:04,535 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-01-28 10:58:04,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 59 [2023-01-28 10:58:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:04,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:58:04,765 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:58:04,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 45 [2023-01-28 10:58:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:04,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524364406] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:58:04,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:58:04,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2023-01-28 10:58:04,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110064433] [2023-01-28 10:58:04,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:58:04,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 10:58:04,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:04,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 10:58:04,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-01-28 10:58:04,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 273 [2023-01-28 10:58:04,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 88 flow. Second operand has 23 states, 23 states have (on average 84.6086956521739) internal successors, (1946), 23 states have internal predecessors, (1946), 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 10:58:04,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:04,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 273 [2023-01-28 10:58:04,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:05,606 INFO L130 PetriNetUnfolder]: 679/981 cut-off events. [2023-01-28 10:58:05,606 INFO L131 PetriNetUnfolder]: For 321/321 co-relation queries the response was YES. [2023-01-28 10:58:05,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2546 conditions, 981 events. 679/981 cut-off events. For 321/321 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3670 event pairs, 84 based on Foata normal form. 2/715 useless extension candidates. Maximal degree in co-relation 2286. Up to 677 conditions per place. [2023-01-28 10:58:05,611 INFO L137 encePairwiseOnDemand]: 263/273 looper letters, 73 selfloop transitions, 35 changer transitions 4/113 dead transitions. [2023-01-28 10:58:05,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 113 transitions, 564 flow [2023-01-28 10:58:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 10:58:05,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 10:58:05,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1175 transitions. [2023-01-28 10:58:05,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3310791772330234 [2023-01-28 10:58:05,614 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1175 transitions. [2023-01-28 10:58:05,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1175 transitions. [2023-01-28 10:58:05,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:05,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1175 transitions. [2023-01-28 10:58:05,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 90.38461538461539) internal successors, (1175), 13 states have internal predecessors, (1175), 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 10:58:05,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 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 10:58:05,620 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 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 10:58:05,620 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 88 flow. Second operand 13 states and 1175 transitions. [2023-01-28 10:58:05,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 113 transitions, 564 flow [2023-01-28 10:58:05,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 113 transitions, 536 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-01-28 10:58:05,622 INFO L231 Difference]: Finished difference. Result has 51 places, 60 transitions, 304 flow [2023-01-28 10:58:05,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=304, PETRI_PLACES=51, PETRI_TRANSITIONS=60} [2023-01-28 10:58:05,623 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 21 predicate places. [2023-01-28 10:58:05,623 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 60 transitions, 304 flow [2023-01-28 10:58:05,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 84.6086956521739) internal successors, (1946), 23 states have internal predecessors, (1946), 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 10:58:05,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:05,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:58:05,630 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 10:58:05,829 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,SelfDestructingSolverStorable3 [2023-01-28 10:58:05,829 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:05,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:05,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1587343155, now seen corresponding path program 2 times [2023-01-28 10:58:05,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:05,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523870468] [2023-01-28 10:58:05,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:05,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:06,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:06,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523870468] [2023-01-28 10:58:06,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523870468] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:06,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127903160] [2023-01-28 10:58:06,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:58:06,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:06,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:58:06,348 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 10:58:06,377 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 10:58:06,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:58:06,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:58:06,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 10:58:06,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:58:06,721 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:58:06,723 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:58:06,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 37 [2023-01-28 10:58:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:06,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:58:06,847 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:58:06,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 45 [2023-01-28 10:58:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:07,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127903160] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:58:07,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:58:07,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 23 [2023-01-28 10:58:07,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263795318] [2023-01-28 10:58:07,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:58:07,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 10:58:07,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:07,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 10:58:07,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2023-01-28 10:58:07,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 273 [2023-01-28 10:58:07,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 60 transitions, 304 flow. Second operand has 25 states, 25 states have (on average 81.52) internal successors, (2038), 25 states have internal predecessors, (2038), 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 10:58:07,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:07,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 273 [2023-01-28 10:58:07,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:07,764 INFO L130 PetriNetUnfolder]: 1001/1468 cut-off events. [2023-01-28 10:58:07,764 INFO L131 PetriNetUnfolder]: For 1349/1349 co-relation queries the response was YES. [2023-01-28 10:58:07,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4806 conditions, 1468 events. 1001/1468 cut-off events. For 1349/1349 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5408 event pairs, 136 based on Foata normal form. 2/1464 useless extension candidates. Maximal degree in co-relation 4542. Up to 1033 conditions per place. [2023-01-28 10:58:07,772 INFO L137 encePairwiseOnDemand]: 261/273 looper letters, 105 selfloop transitions, 54 changer transitions 7/166 dead transitions. [2023-01-28 10:58:07,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 166 transitions, 1007 flow [2023-01-28 10:58:07,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 10:58:07,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 10:58:07,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1561 transitions. [2023-01-28 10:58:07,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3176638176638177 [2023-01-28 10:58:07,776 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1561 transitions. [2023-01-28 10:58:07,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1561 transitions. [2023-01-28 10:58:07,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:07,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1561 transitions. [2023-01-28 10:58:07,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 86.72222222222223) internal successors, (1561), 18 states have internal predecessors, (1561), 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 10:58:07,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 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 10:58:07,788 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 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 10:58:07,788 INFO L175 Difference]: Start difference. First operand has 51 places, 60 transitions, 304 flow. Second operand 18 states and 1561 transitions. [2023-01-28 10:58:07,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 166 transitions, 1007 flow [2023-01-28 10:58:07,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 166 transitions, 993 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 10:58:07,797 INFO L231 Difference]: Finished difference. Result has 74 places, 97 transitions, 664 flow [2023-01-28 10:58:07,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=664, PETRI_PLACES=74, PETRI_TRANSITIONS=97} [2023-01-28 10:58:07,799 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2023-01-28 10:58:07,799 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 97 transitions, 664 flow [2023-01-28 10:58:07,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.52) internal successors, (2038), 25 states have internal predecessors, (2038), 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 10:58:07,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:07,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:58:07,819 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 10:58:08,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:08,006 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:08,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:08,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1702762413, now seen corresponding path program 3 times [2023-01-28 10:58:08,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:08,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387316945] [2023-01-28 10:58:08,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:08,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:08,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:08,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387316945] [2023-01-28 10:58:08,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387316945] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:08,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676610003] [2023-01-28 10:58:08,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:58:08,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:08,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:58:08,601 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 10:58:08,653 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 10:58:08,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:58:08,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:58:08,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 30 conjunts are in the unsatisfiable core [2023-01-28 10:58:08,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:58:09,003 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:58:09,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:58:09,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 37 [2023-01-28 10:58:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:09,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:58:09,150 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:58:09,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 45 [2023-01-28 10:58:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:09,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676610003] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:58:09,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:58:09,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 24 [2023-01-28 10:58:09,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561938171] [2023-01-28 10:58:09,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:58:09,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 10:58:09,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:09,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 10:58:09,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2023-01-28 10:58:09,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 273 [2023-01-28 10:58:09,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 97 transitions, 664 flow. Second operand has 26 states, 26 states have (on average 71.42307692307692) internal successors, (1857), 26 states have internal predecessors, (1857), 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 10:58:09,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:09,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 273 [2023-01-28 10:58:09,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:10,443 INFO L130 PetriNetUnfolder]: 1399/2097 cut-off events. [2023-01-28 10:58:10,444 INFO L131 PetriNetUnfolder]: For 3789/3789 co-relation queries the response was YES. [2023-01-28 10:58:10,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8288 conditions, 2097 events. 1399/2097 cut-off events. For 3789/3789 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8873 event pairs, 132 based on Foata normal form. 3/2100 useless extension candidates. Maximal degree in co-relation 8253. Up to 1224 conditions per place. [2023-01-28 10:58:10,457 INFO L137 encePairwiseOnDemand]: 259/273 looper letters, 161 selfloop transitions, 107 changer transitions 5/273 dead transitions. [2023-01-28 10:58:10,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 273 transitions, 2012 flow [2023-01-28 10:58:10,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 10:58:10,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 10:58:10,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1718 transitions. [2023-01-28 10:58:10,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.286047286047286 [2023-01-28 10:58:10,461 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1718 transitions. [2023-01-28 10:58:10,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1718 transitions. [2023-01-28 10:58:10,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:10,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1718 transitions. [2023-01-28 10:58:10,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 78.0909090909091) internal successors, (1718), 22 states have internal predecessors, (1718), 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 10:58:10,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 273.0) internal successors, (6279), 23 states have internal predecessors, (6279), 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 10:58:10,470 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 273.0) internal successors, (6279), 23 states have internal predecessors, (6279), 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 10:58:10,471 INFO L175 Difference]: Start difference. First operand has 74 places, 97 transitions, 664 flow. Second operand 22 states and 1718 transitions. [2023-01-28 10:58:10,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 273 transitions, 2012 flow [2023-01-28 10:58:10,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 273 transitions, 1953 flow, removed 25 selfloop flow, removed 3 redundant places. [2023-01-28 10:58:10,541 INFO L231 Difference]: Finished difference. Result has 104 places, 159 transitions, 1411 flow [2023-01-28 10:58:10,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1411, PETRI_PLACES=104, PETRI_TRANSITIONS=159} [2023-01-28 10:58:10,541 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 74 predicate places. [2023-01-28 10:58:10,542 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 159 transitions, 1411 flow [2023-01-28 10:58:10,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 71.42307692307692) internal successors, (1857), 26 states have internal predecessors, (1857), 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 10:58:10,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:10,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:58:10,547 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 10:58:10,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:10,747 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:10,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:10,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1571153735, now seen corresponding path program 4 times [2023-01-28 10:58:10,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:10,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389641788] [2023-01-28 10:58:10,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:10,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:11,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:11,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389641788] [2023-01-28 10:58:11,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389641788] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:11,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483307196] [2023-01-28 10:58:11,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:58:11,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:11,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:58:11,225 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 10:58:11,227 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 10:58:11,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:58:11,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:58:11,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-28 10:58:11,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:58:11,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:58:11,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-01-28 10:58:11,649 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:58:11,651 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:58:11,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 37 [2023-01-28 10:58:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:11,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:58:11,828 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (or (= c_~max1~0 c_~max2~0) (forall ((v_ArrVal_261 (Array Int Int))) (< c_~max2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_261) c_~A~0.base) .cse0)))) (forall ((v_ArrVal_261 (Array Int Int))) (let ((.cse1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_261) c_~A~0.base) .cse0))) (or (= c_~max1~0 .cse1) (<= .cse1 c_~max2~0)))))) is different from false [2023-01-28 10:58:11,856 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:58:11,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 99 [2023-01-28 10:58:11,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2023-01-28 10:58:11,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2023-01-28 10:58:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-01-28 10:58:12,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483307196] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:58:12,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:58:12,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-01-28 10:58:12,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053715289] [2023-01-28 10:58:12,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:58:12,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 10:58:12,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:12,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 10:58:12,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=592, Unknown=1, NotChecked=50, Total=756 [2023-01-28 10:58:12,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 273 [2023-01-28 10:58:12,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 159 transitions, 1411 flow. Second operand has 28 states, 28 states have (on average 77.25) internal successors, (2163), 28 states have internal predecessors, (2163), 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 10:58:12,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:12,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 273 [2023-01-28 10:58:12,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:13,200 INFO L130 PetriNetUnfolder]: 1794/2701 cut-off events. [2023-01-28 10:58:13,201 INFO L131 PetriNetUnfolder]: For 9600/9600 co-relation queries the response was YES. [2023-01-28 10:58:13,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13200 conditions, 2701 events. 1794/2701 cut-off events. For 9600/9600 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12296 event pairs, 168 based on Foata normal form. 1/2702 useless extension candidates. Maximal degree in co-relation 13154. Up to 1507 conditions per place. [2023-01-28 10:58:13,219 INFO L137 encePairwiseOnDemand]: 259/273 looper letters, 175 selfloop transitions, 150 changer transitions 4/329 dead transitions. [2023-01-28 10:58:13,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 329 transitions, 3191 flow [2023-01-28 10:58:13,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 10:58:13,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 10:58:13,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1763 transitions. [2023-01-28 10:58:13,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3075178789464504 [2023-01-28 10:58:13,223 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1763 transitions. [2023-01-28 10:58:13,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1763 transitions. [2023-01-28 10:58:13,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:13,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1763 transitions. [2023-01-28 10:58:13,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 83.95238095238095) internal successors, (1763), 21 states have internal predecessors, (1763), 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 10:58:13,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 273.0) internal successors, (6006), 22 states have internal predecessors, (6006), 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 10:58:13,231 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 273.0) internal successors, (6006), 22 states have internal predecessors, (6006), 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 10:58:13,231 INFO L175 Difference]: Start difference. First operand has 104 places, 159 transitions, 1411 flow. Second operand 21 states and 1763 transitions. [2023-01-28 10:58:13,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 329 transitions, 3191 flow [2023-01-28 10:58:13,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 329 transitions, 3065 flow, removed 55 selfloop flow, removed 4 redundant places. [2023-01-28 10:58:13,257 INFO L231 Difference]: Finished difference. Result has 127 places, 222 transitions, 2379 flow [2023-01-28 10:58:13,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2379, PETRI_PLACES=127, PETRI_TRANSITIONS=222} [2023-01-28 10:58:13,257 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2023-01-28 10:58:13,257 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 222 transitions, 2379 flow [2023-01-28 10:58:13,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 77.25) internal successors, (2163), 28 states have internal predecessors, (2163), 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 10:58:13,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:13,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:58:13,265 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 10:58:13,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:13,463 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:13,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:13,463 INFO L85 PathProgramCache]: Analyzing trace with hash 353698307, now seen corresponding path program 5 times [2023-01-28 10:58:13,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:13,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576212578] [2023-01-28 10:58:13,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:13,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:13,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:13,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576212578] [2023-01-28 10:58:13,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576212578] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:13,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457259131] [2023-01-28 10:58:13,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:58:13,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:13,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:58:13,873 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:58:13,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 10:58:13,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 10:58:13,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:58:13,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 10:58:13,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:58:14,129 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:58:14,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 71 [2023-01-28 10:58:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:14,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:58:14,633 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:58:14,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 41 [2023-01-28 10:58:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:14,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457259131] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:58:14,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:58:14,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 20 [2023-01-28 10:58:14,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315869608] [2023-01-28 10:58:14,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:58:14,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 10:58:14,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:14,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 10:58:14,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2023-01-28 10:58:14,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 273 [2023-01-28 10:58:14,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 222 transitions, 2379 flow. Second operand has 22 states, 22 states have (on average 84.68181818181819) internal successors, (1863), 22 states have internal predecessors, (1863), 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 10:58:14,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:14,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 273 [2023-01-28 10:58:14,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:16,552 INFO L130 PetriNetUnfolder]: 2493/3915 cut-off events. [2023-01-28 10:58:16,552 INFO L131 PetriNetUnfolder]: For 20392/20444 co-relation queries the response was YES. [2023-01-28 10:58:16,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20768 conditions, 3915 events. 2493/3915 cut-off events. For 20392/20444 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 21794 event pairs, 185 based on Foata normal form. 38/3940 useless extension candidates. Maximal degree in co-relation 20714. Up to 2338 conditions per place. [2023-01-28 10:58:16,589 INFO L137 encePairwiseOnDemand]: 259/273 looper letters, 217 selfloop transitions, 197 changer transitions 9/429 dead transitions. [2023-01-28 10:58:16,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 429 transitions, 4902 flow [2023-01-28 10:58:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 10:58:16,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 10:58:16,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2148 transitions. [2023-01-28 10:58:16,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32783882783882784 [2023-01-28 10:58:16,594 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2148 transitions. [2023-01-28 10:58:16,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2148 transitions. [2023-01-28 10:58:16,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:16,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2148 transitions. [2023-01-28 10:58:16,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 89.5) internal successors, (2148), 24 states have internal predecessors, (2148), 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 10:58:16,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 273.0) internal successors, (6825), 25 states have internal predecessors, (6825), 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 10:58:16,603 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 273.0) internal successors, (6825), 25 states have internal predecessors, (6825), 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 10:58:16,603 INFO L175 Difference]: Start difference. First operand has 127 places, 222 transitions, 2379 flow. Second operand 24 states and 2148 transitions. [2023-01-28 10:58:16,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 429 transitions, 4902 flow [2023-01-28 10:58:16,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 429 transitions, 4594 flow, removed 142 selfloop flow, removed 5 redundant places. [2023-01-28 10:58:16,651 INFO L231 Difference]: Finished difference. Result has 154 places, 337 transitions, 3925 flow [2023-01-28 10:58:16,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2222, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3925, PETRI_PLACES=154, PETRI_TRANSITIONS=337} [2023-01-28 10:58:16,653 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 124 predicate places. [2023-01-28 10:58:16,653 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 337 transitions, 3925 flow [2023-01-28 10:58:16,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 84.68181818181819) internal successors, (1863), 22 states have internal predecessors, (1863), 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 10:58:16,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:16,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:58:16,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 10:58:16,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:16,859 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:16,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:16,859 INFO L85 PathProgramCache]: Analyzing trace with hash -536441915, now seen corresponding path program 6 times [2023-01-28 10:58:16,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:16,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232495095] [2023-01-28 10:58:16,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:16,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:17,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:17,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232495095] [2023-01-28 10:58:17,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232495095] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:17,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088181975] [2023-01-28 10:58:17,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:58:17,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:17,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:58:17,230 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:58:17,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 10:58:17,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 10:58:17,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:58:17,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 30 conjunts are in the unsatisfiable core [2023-01-28 10:58:17,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:58:17,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 30 [2023-01-28 10:58:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:17,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:58:17,594 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:58:17,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 45 [2023-01-28 10:58:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:17,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088181975] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:58:17,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:58:17,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-01-28 10:58:17,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386407606] [2023-01-28 10:58:17,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:58:17,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 10:58:17,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:17,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 10:58:17,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-01-28 10:58:17,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 273 [2023-01-28 10:58:17,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 337 transitions, 3925 flow. Second operand has 22 states, 22 states have (on average 81.77272727272727) internal successors, (1799), 22 states have internal predecessors, (1799), 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 10:58:17,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:17,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 273 [2023-01-28 10:58:17,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:18,698 INFO L130 PetriNetUnfolder]: 2826/4401 cut-off events. [2023-01-28 10:58:18,699 INFO L131 PetriNetUnfolder]: For 29259/29259 co-relation queries the response was YES. [2023-01-28 10:58:18,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25243 conditions, 4401 events. 2826/4401 cut-off events. For 29259/29259 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23294 event pairs, 721 based on Foata normal form. 2/4403 useless extension candidates. Maximal degree in co-relation 25180. Up to 3860 conditions per place. [2023-01-28 10:58:18,735 INFO L137 encePairwiseOnDemand]: 261/273 looper letters, 278 selfloop transitions, 135 changer transitions 2/415 dead transitions. [2023-01-28 10:58:18,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 415 transitions, 5444 flow [2023-01-28 10:58:18,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 10:58:18,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 10:58:18,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1544 transitions. [2023-01-28 10:58:18,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3142043142043142 [2023-01-28 10:58:18,738 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1544 transitions. [2023-01-28 10:58:18,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1544 transitions. [2023-01-28 10:58:18,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:18,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1544 transitions. [2023-01-28 10:58:18,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 85.77777777777777) internal successors, (1544), 18 states have internal predecessors, (1544), 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 10:58:18,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 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 10:58:18,755 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 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 10:58:18,755 INFO L175 Difference]: Start difference. First operand has 154 places, 337 transitions, 3925 flow. Second operand 18 states and 1544 transitions. [2023-01-28 10:58:18,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 415 transitions, 5444 flow [2023-01-28 10:58:18,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 415 transitions, 4874 flow, removed 222 selfloop flow, removed 7 redundant places. [2023-01-28 10:58:18,830 INFO L231 Difference]: Finished difference. Result has 168 places, 363 transitions, 4059 flow [2023-01-28 10:58:18,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3482, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4059, PETRI_PLACES=168, PETRI_TRANSITIONS=363} [2023-01-28 10:58:18,832 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 138 predicate places. [2023-01-28 10:58:18,832 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 363 transitions, 4059 flow [2023-01-28 10:58:18,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 81.77272727272727) internal successors, (1799), 22 states have internal predecessors, (1799), 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 10:58:18,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:18,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:58:18,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 10:58:19,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:19,037 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:19,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:19,038 INFO L85 PathProgramCache]: Analyzing trace with hash 820266829, now seen corresponding path program 7 times [2023-01-28 10:58:19,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:19,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971967381] [2023-01-28 10:58:19,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:19,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:19,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:19,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:19,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971967381] [2023-01-28 10:58:19,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971967381] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:19,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106437953] [2023-01-28 10:58:19,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:58:19,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:19,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:58:19,617 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:58:19,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 10:58:19,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:19,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 10:58:19,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:58:19,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 30 [2023-01-28 10:58:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:19,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:58:20,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:58:20,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 45 [2023-01-28 10:58:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:20,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106437953] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:58:20,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:58:20,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 22 [2023-01-28 10:58:20,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092237954] [2023-01-28 10:58:20,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:58:20,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 10:58:20,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:20,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 10:58:20,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-01-28 10:58:20,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 273 [2023-01-28 10:58:20,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 363 transitions, 4059 flow. Second operand has 24 states, 24 states have (on average 74.45833333333333) internal successors, (1787), 24 states have internal predecessors, (1787), 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 10:58:20,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:20,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 273 [2023-01-28 10:58:20,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:21,166 INFO L130 PetriNetUnfolder]: 2667/4232 cut-off events. [2023-01-28 10:58:21,166 INFO L131 PetriNetUnfolder]: For 22344/22381 co-relation queries the response was YES. [2023-01-28 10:58:21,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22983 conditions, 4232 events. 2667/4232 cut-off events. For 22344/22381 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23723 event pairs, 570 based on Foata normal form. 24/4240 useless extension candidates. Maximal degree in co-relation 22917. Up to 3867 conditions per place. [2023-01-28 10:58:21,195 INFO L137 encePairwiseOnDemand]: 263/273 looper letters, 289 selfloop transitions, 110 changer transitions 1/410 dead transitions. [2023-01-28 10:58:21,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 410 transitions, 5166 flow [2023-01-28 10:58:21,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 10:58:21,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 10:58:21,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 875 transitions. [2023-01-28 10:58:21,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2913752913752914 [2023-01-28 10:58:21,197 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 875 transitions. [2023-01-28 10:58:21,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 875 transitions. [2023-01-28 10:58:21,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:21,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 875 transitions. [2023-01-28 10:58:21,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 79.54545454545455) internal successors, (875), 11 states have internal predecessors, (875), 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 10:58:21,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 273.0) internal successors, (3276), 12 states have internal predecessors, (3276), 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 10:58:21,200 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 273.0) internal successors, (3276), 12 states have internal predecessors, (3276), 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 10:58:21,200 INFO L175 Difference]: Start difference. First operand has 168 places, 363 transitions, 4059 flow. Second operand 11 states and 875 transitions. [2023-01-28 10:58:21,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 410 transitions, 5166 flow [2023-01-28 10:58:21,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 410 transitions, 5000 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-01-28 10:58:21,249 INFO L231 Difference]: Finished difference. Result has 173 places, 375 transitions, 4307 flow [2023-01-28 10:58:21,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3899, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4307, PETRI_PLACES=173, PETRI_TRANSITIONS=375} [2023-01-28 10:58:21,251 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 143 predicate places. [2023-01-28 10:58:21,251 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 375 transitions, 4307 flow [2023-01-28 10:58:21,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 74.45833333333333) internal successors, (1787), 24 states have internal predecessors, (1787), 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 10:58:21,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:21,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:58:21,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 10:58:21,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-01-28 10:58:21,457 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:21,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:21,458 INFO L85 PathProgramCache]: Analyzing trace with hash 663032483, now seen corresponding path program 8 times [2023-01-28 10:58:21,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:21,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684875995] [2023-01-28 10:58:21,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:21,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:21,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:21,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:21,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684875995] [2023-01-28 10:58:21,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684875995] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:21,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934362072] [2023-01-28 10:58:21,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:58:21,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:21,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:58:21,918 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:58:21,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 10:58:21,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:58:21,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:58:21,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 10:58:21,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:58:22,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:58:22,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-01-28 10:58:22,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:58:22,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-01-28 10:58:22,441 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:58:22,443 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:58:22,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 37 [2023-01-28 10:58:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:22,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:58:22,649 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_438 (Array Int Int)) (v_ArrVal_439 (Array Int Int))) (let ((.cse0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_438) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_439) c_~A~0.base) .cse1))) (or (= c_~max1~0 .cse0) (<= .cse0 c_~max2~0)))) (or (= c_~max1~0 c_~max2~0) (forall ((v_ArrVal_438 (Array Int Int)) (v_ArrVal_439 (Array Int Int))) (< c_~max2~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_438) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_439) c_~A~0.base) .cse1)))))) is different from false [2023-01-28 10:58:22,667 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:58:22,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 409 treesize of output 353 [2023-01-28 10:58:22,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 171 [2023-01-28 10:58:22,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 165 [2023-01-28 10:58:22,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 153 [2023-01-28 10:58:22,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 129 [2023-01-28 10:58:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:22,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934362072] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:58:22,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:58:22,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-01-28 10:58:22,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576376151] [2023-01-28 10:58:22,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:58:22,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 10:58:22,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:22,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 10:58:22,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=592, Unknown=8, NotChecked=50, Total=756 [2023-01-28 10:58:22,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 273 [2023-01-28 10:58:22,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 375 transitions, 4307 flow. Second operand has 28 states, 28 states have (on average 77.14285714285714) internal successors, (2160), 28 states have internal predecessors, (2160), 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 10:58:22,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:22,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 273 [2023-01-28 10:58:22,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:28,363 INFO L130 PetriNetUnfolder]: 2910/4621 cut-off events. [2023-01-28 10:58:28,363 INFO L131 PetriNetUnfolder]: For 26057/26173 co-relation queries the response was YES. [2023-01-28 10:58:28,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25525 conditions, 4621 events. 2910/4621 cut-off events. For 26057/26173 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 26544 event pairs, 407 based on Foata normal form. 42/4649 useless extension candidates. Maximal degree in co-relation 25456. Up to 3074 conditions per place. [2023-01-28 10:58:28,398 INFO L137 encePairwiseOnDemand]: 262/273 looper letters, 248 selfloop transitions, 201 changer transitions 4/463 dead transitions. [2023-01-28 10:58:28,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 463 transitions, 5800 flow [2023-01-28 10:58:28,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 10:58:28,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 10:58:28,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1102 transitions. [2023-01-28 10:58:28,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31051000281769514 [2023-01-28 10:58:28,400 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1102 transitions. [2023-01-28 10:58:28,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1102 transitions. [2023-01-28 10:58:28,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:28,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1102 transitions. [2023-01-28 10:58:28,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 84.76923076923077) internal successors, (1102), 13 states have internal predecessors, (1102), 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 10:58:28,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 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 10:58:28,404 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 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 10:58:28,404 INFO L175 Difference]: Start difference. First operand has 173 places, 375 transitions, 4307 flow. Second operand 13 states and 1102 transitions. [2023-01-28 10:58:28,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 463 transitions, 5800 flow [2023-01-28 10:58:28,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 463 transitions, 5649 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-01-28 10:58:28,471 INFO L231 Difference]: Finished difference. Result has 183 places, 398 transitions, 5003 flow [2023-01-28 10:58:28,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=4156, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5003, PETRI_PLACES=183, PETRI_TRANSITIONS=398} [2023-01-28 10:58:28,472 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2023-01-28 10:58:28,472 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 398 transitions, 5003 flow [2023-01-28 10:58:28,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 77.14285714285714) internal successors, (2160), 28 states have internal predecessors, (2160), 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 10:58:28,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:28,473 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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 10:58:28,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 10:58:28,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:28,693 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:28,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:28,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1650774356, now seen corresponding path program 9 times [2023-01-28 10:58:28,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:28,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750803521] [2023-01-28 10:58:28,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:28,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:28,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:28,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750803521] [2023-01-28 10:58:28,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750803521] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:28,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754861021] [2023-01-28 10:58:28,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:58:28,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:28,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:58:28,786 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:58:28,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 10:58:28,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:58:28,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:58:28,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 10:58:28,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:58:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:28,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:58:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:28,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754861021] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:58:28,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:58:28,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-28 10:58:28,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42932448] [2023-01-28 10:58:28,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:58:28,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 10:58:28,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:28,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 10:58:28,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-01-28 10:58:28,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 273 [2023-01-28 10:58:28,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 398 transitions, 5003 flow. Second operand has 14 states, 14 states have (on average 106.35714285714286) internal successors, (1489), 14 states have internal predecessors, (1489), 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 10:58:28,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:28,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 273 [2023-01-28 10:58:28,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:29,645 INFO L130 PetriNetUnfolder]: 2867/4707 cut-off events. [2023-01-28 10:58:29,645 INFO L131 PetriNetUnfolder]: For 39136/39461 co-relation queries the response was YES. [2023-01-28 10:58:29,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27443 conditions, 4707 events. 2867/4707 cut-off events. For 39136/39461 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 28953 event pairs, 726 based on Foata normal form. 420/5018 useless extension candidates. Maximal degree in co-relation 27370. Up to 2543 conditions per place. [2023-01-28 10:58:29,679 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 355 selfloop transitions, 39 changer transitions 1/427 dead transitions. [2023-01-28 10:58:29,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 427 transitions, 5969 flow [2023-01-28 10:58:29,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 10:58:29,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 10:58:29,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 904 transitions. [2023-01-28 10:58:29,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4139194139194139 [2023-01-28 10:58:29,694 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 904 transitions. [2023-01-28 10:58:29,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 904 transitions. [2023-01-28 10:58:29,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:29,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 904 transitions. [2023-01-28 10:58:29,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.0) internal successors, (904), 8 states have internal predecessors, (904), 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 10:58:29,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 273.0) internal successors, (2457), 9 states have internal predecessors, (2457), 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 10:58:29,696 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 273.0) internal successors, (2457), 9 states have internal predecessors, (2457), 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 10:58:29,696 INFO L175 Difference]: Start difference. First operand has 183 places, 398 transitions, 5003 flow. Second operand 8 states and 904 transitions. [2023-01-28 10:58:29,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 427 transitions, 5969 flow [2023-01-28 10:58:29,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 427 transitions, 5756 flow, removed 37 selfloop flow, removed 8 redundant places. [2023-01-28 10:58:29,767 INFO L231 Difference]: Finished difference. Result has 186 places, 366 transitions, 4532 flow [2023-01-28 10:58:29,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=4349, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4532, PETRI_PLACES=186, PETRI_TRANSITIONS=366} [2023-01-28 10:58:29,768 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 156 predicate places. [2023-01-28 10:58:29,768 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 366 transitions, 4532 flow [2023-01-28 10:58:29,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 106.35714285714286) internal successors, (1489), 14 states have internal predecessors, (1489), 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 10:58:29,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:29,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:58:29,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 10:58:29,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-01-28 10:58:29,974 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:29,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:29,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1159546519, now seen corresponding path program 1 times [2023-01-28 10:58:29,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:29,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520962158] [2023-01-28 10:58:29,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:29,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:30,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:30,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520962158] [2023-01-28 10:58:30,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520962158] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:30,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439994264] [2023-01-28 10:58:30,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:30,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:30,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:58:30,059 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:58:30,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 10:58:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:30,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 10:58:30,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:58:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:30,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:58:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:30,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439994264] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:58:30,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:58:30,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 10:58:30,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004079186] [2023-01-28 10:58:30,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:58:30,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 10:58:30,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:30,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 10:58:30,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-01-28 10:58:30,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 273 [2023-01-28 10:58:30,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 366 transitions, 4532 flow. Second operand has 16 states, 16 states have (on average 99.3125) internal successors, (1589), 16 states have internal predecessors, (1589), 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 10:58:30,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:30,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 273 [2023-01-28 10:58:30,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:31,025 INFO L130 PetriNetUnfolder]: 2773/4666 cut-off events. [2023-01-28 10:58:31,026 INFO L131 PetriNetUnfolder]: For 38674/38698 co-relation queries the response was YES. [2023-01-28 10:58:31,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26816 conditions, 4666 events. 2773/4666 cut-off events. For 38674/38698 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 28678 event pairs, 315 based on Foata normal form. 339/4994 useless extension candidates. Maximal degree in co-relation 26739. Up to 2009 conditions per place. [2023-01-28 10:58:31,059 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 391 selfloop transitions, 44 changer transitions 20/470 dead transitions. [2023-01-28 10:58:31,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 470 transitions, 6221 flow [2023-01-28 10:58:31,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 10:58:31,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 10:58:31,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1163 transitions. [2023-01-28 10:58:31,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38727938727938727 [2023-01-28 10:58:31,062 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1163 transitions. [2023-01-28 10:58:31,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1163 transitions. [2023-01-28 10:58:31,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:31,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1163 transitions. [2023-01-28 10:58:31,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 105.72727272727273) internal successors, (1163), 11 states have internal predecessors, (1163), 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 10:58:31,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 273.0) internal successors, (3276), 12 states have internal predecessors, (3276), 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 10:58:31,065 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 273.0) internal successors, (3276), 12 states have internal predecessors, (3276), 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 10:58:31,065 INFO L175 Difference]: Start difference. First operand has 186 places, 366 transitions, 4532 flow. Second operand 11 states and 1163 transitions. [2023-01-28 10:58:31,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 470 transitions, 6221 flow [2023-01-28 10:58:31,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 470 transitions, 6216 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 10:58:31,157 INFO L231 Difference]: Finished difference. Result has 200 places, 298 transitions, 3944 flow [2023-01-28 10:58:31,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3659, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3944, PETRI_PLACES=200, PETRI_TRANSITIONS=298} [2023-01-28 10:58:31,158 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 170 predicate places. [2023-01-28 10:58:31,158 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 298 transitions, 3944 flow [2023-01-28 10:58:31,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 99.3125) internal successors, (1589), 16 states have internal predecessors, (1589), 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 10:58:31,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:31,158 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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 10:58:31,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 10:58:31,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-28 10:58:31,363 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:31,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:31,363 INFO L85 PathProgramCache]: Analyzing trace with hash -826576938, now seen corresponding path program 10 times [2023-01-28 10:58:31,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:31,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244047684] [2023-01-28 10:58:31,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:31,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:31,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:31,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244047684] [2023-01-28 10:58:31,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244047684] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:31,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065480935] [2023-01-28 10:58:31,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:58:31,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:31,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:58:31,482 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:58:31,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 10:58:31,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:58:31,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:58:31,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-28 10:58:31,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:58:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:31,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:58:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:31,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065480935] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:58:31,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:58:31,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 17 [2023-01-28 10:58:31,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268802762] [2023-01-28 10:58:31,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:58:31,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 10:58:31,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:31,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 10:58:31,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-01-28 10:58:31,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 273 [2023-01-28 10:58:31,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 298 transitions, 3944 flow. Second operand has 17 states, 17 states have (on average 100.47058823529412) internal successors, (1708), 17 states have internal predecessors, (1708), 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 10:58:31,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:31,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 273 [2023-01-28 10:58:31,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:32,812 INFO L130 PetriNetUnfolder]: 2231/3931 cut-off events. [2023-01-28 10:58:32,812 INFO L131 PetriNetUnfolder]: For 47227/47254 co-relation queries the response was YES. [2023-01-28 10:58:32,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25351 conditions, 3931 events. 2231/3931 cut-off events. For 47227/47254 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 25646 event pairs, 249 based on Foata normal form. 317/4235 useless extension candidates. Maximal degree in co-relation 25267. Up to 964 conditions per place. [2023-01-28 10:58:32,842 INFO L137 encePairwiseOnDemand]: 264/273 looper letters, 190 selfloop transitions, 89 changer transitions 153/436 dead transitions. [2023-01-28 10:58:32,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 436 transitions, 5975 flow [2023-01-28 10:58:32,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 10:58:32,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 10:58:32,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2300 transitions. [2023-01-28 10:58:32,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.382950382950383 [2023-01-28 10:58:32,846 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2300 transitions. [2023-01-28 10:58:32,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2300 transitions. [2023-01-28 10:58:32,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:32,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2300 transitions. [2023-01-28 10:58:32,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 104.54545454545455) internal successors, (2300), 22 states have internal predecessors, (2300), 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 10:58:32,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 273.0) internal successors, (6279), 23 states have internal predecessors, (6279), 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 10:58:32,852 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 273.0) internal successors, (6279), 23 states have internal predecessors, (6279), 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 10:58:32,852 INFO L175 Difference]: Start difference. First operand has 200 places, 298 transitions, 3944 flow. Second operand 22 states and 2300 transitions. [2023-01-28 10:58:32,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 436 transitions, 5975 flow [2023-01-28 10:58:32,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 436 transitions, 5627 flow, removed 79 selfloop flow, removed 14 redundant places. [2023-01-28 10:58:32,965 INFO L231 Difference]: Finished difference. Result has 207 places, 196 transitions, 2500 flow [2023-01-28 10:58:32,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3391, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2500, PETRI_PLACES=207, PETRI_TRANSITIONS=196} [2023-01-28 10:58:32,965 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 177 predicate places. [2023-01-28 10:58:32,965 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 196 transitions, 2500 flow [2023-01-28 10:58:32,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 100.47058823529412) internal successors, (1708), 17 states have internal predecessors, (1708), 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 10:58:32,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:32,966 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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 10:58:32,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 10:58:33,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-28 10:58:33,171 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:33,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:33,172 INFO L85 PathProgramCache]: Analyzing trace with hash 858875532, now seen corresponding path program 11 times [2023-01-28 10:58:33,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:33,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915143313] [2023-01-28 10:58:33,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:33,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:33,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:33,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:33,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915143313] [2023-01-28 10:58:33,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915143313] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:33,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380412625] [2023-01-28 10:58:33,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:58:33,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:33,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:58:33,270 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:58:33,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 10:58:33,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:58:33,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:58:33,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 10:58:33,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:58:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:33,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:58:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:33,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380412625] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:58:33,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:58:33,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-01-28 10:58:33,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207712246] [2023-01-28 10:58:33,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:58:33,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 10:58:33,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:33,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 10:58:33,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-01-28 10:58:33,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 273 [2023-01-28 10:58:33,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 196 transitions, 2500 flow. Second operand has 15 states, 15 states have (on average 106.33333333333333) internal successors, (1595), 15 states have internal predecessors, (1595), 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 10:58:33,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:33,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 273 [2023-01-28 10:58:33,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:33,694 INFO L130 PetriNetUnfolder]: 839/1263 cut-off events. [2023-01-28 10:58:33,694 INFO L131 PetriNetUnfolder]: For 14706/14799 co-relation queries the response was YES. [2023-01-28 10:58:33,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9285 conditions, 1263 events. 839/1263 cut-off events. For 14706/14799 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5310 event pairs, 130 based on Foata normal form. 135/1366 useless extension candidates. Maximal degree in co-relation 9217. Up to 678 conditions per place. [2023-01-28 10:58:33,703 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 111 selfloop transitions, 65 changer transitions 0/186 dead transitions. [2023-01-28 10:58:33,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 186 transitions, 2664 flow [2023-01-28 10:58:33,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:58:33,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:58:33,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 773 transitions. [2023-01-28 10:58:33,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4045002616431188 [2023-01-28 10:58:33,704 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 773 transitions. [2023-01-28 10:58:33,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 773 transitions. [2023-01-28 10:58:33,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:33,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 773 transitions. [2023-01-28 10:58:33,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.42857142857143) internal successors, (773), 7 states have internal predecessors, (773), 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 10:58:33,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 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 10:58:33,707 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 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 10:58:33,707 INFO L175 Difference]: Start difference. First operand has 207 places, 196 transitions, 2500 flow. Second operand 7 states and 773 transitions. [2023-01-28 10:58:33,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 186 transitions, 2664 flow [2023-01-28 10:58:33,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 186 transitions, 2089 flow, removed 168 selfloop flow, removed 34 redundant places. [2023-01-28 10:58:33,732 INFO L231 Difference]: Finished difference. Result has 115 places, 162 transitions, 1699 flow [2023-01-28 10:58:33,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1699, PETRI_PLACES=115, PETRI_TRANSITIONS=162} [2023-01-28 10:58:33,733 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 85 predicate places. [2023-01-28 10:58:33,733 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 162 transitions, 1699 flow [2023-01-28 10:58:33,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 106.33333333333333) internal successors, (1595), 15 states have internal predecessors, (1595), 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 10:58:33,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:33,733 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:58:33,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-28 10:58:33,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 10:58:33,938 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:33,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:33,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1834037619, now seen corresponding path program 12 times [2023-01-28 10:58:33,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:33,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178614130] [2023-01-28 10:58:33,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:33,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:34,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:34,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178614130] [2023-01-28 10:58:34,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178614130] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:34,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745819143] [2023-01-28 10:58:34,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:58:34,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:34,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:58:34,059 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:58:34,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 10:58:34,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 10:58:34,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:58:34,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 10:58:34,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:58:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:34,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:58:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:34,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745819143] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:58:34,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:58:34,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-01-28 10:58:34,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146653720] [2023-01-28 10:58:34,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:58:34,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 10:58:34,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:34,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 10:58:34,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-01-28 10:58:34,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 273 [2023-01-28 10:58:34,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 162 transitions, 1699 flow. Second operand has 21 states, 21 states have (on average 99.14285714285714) internal successors, (2082), 21 states have internal predecessors, (2082), 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 10:58:34,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:34,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 273 [2023-01-28 10:58:34,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:34,971 INFO L130 PetriNetUnfolder]: 1410/2155 cut-off events. [2023-01-28 10:58:34,971 INFO L131 PetriNetUnfolder]: For 11222/11234 co-relation queries the response was YES. [2023-01-28 10:58:34,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11835 conditions, 2155 events. 1410/2155 cut-off events. For 11222/11234 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 9665 event pairs, 245 based on Foata normal form. 29/2170 useless extension candidates. Maximal degree in co-relation 11795. Up to 1108 conditions per place. [2023-01-28 10:58:34,981 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 242 selfloop transitions, 108 changer transitions 0/360 dead transitions. [2023-01-28 10:58:34,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 360 transitions, 4084 flow [2023-01-28 10:58:34,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 10:58:34,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 10:58:34,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1576 transitions. [2023-01-28 10:58:34,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3848595848595849 [2023-01-28 10:58:34,983 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1576 transitions. [2023-01-28 10:58:34,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1576 transitions. [2023-01-28 10:58:34,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:34,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1576 transitions. [2023-01-28 10:58:34,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 105.06666666666666) internal successors, (1576), 15 states have internal predecessors, (1576), 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 10:58:34,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 273.0) internal successors, (4368), 16 states have internal predecessors, (4368), 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 10:58:34,989 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 273.0) internal successors, (4368), 16 states have internal predecessors, (4368), 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 10:58:34,990 INFO L175 Difference]: Start difference. First operand has 115 places, 162 transitions, 1699 flow. Second operand 15 states and 1576 transitions. [2023-01-28 10:58:34,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 360 transitions, 4084 flow [2023-01-28 10:58:35,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 360 transitions, 3854 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-01-28 10:58:35,010 INFO L231 Difference]: Finished difference. Result has 129 places, 234 transitions, 2626 flow [2023-01-28 10:58:35,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1565, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2626, PETRI_PLACES=129, PETRI_TRANSITIONS=234} [2023-01-28 10:58:35,010 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 99 predicate places. [2023-01-28 10:58:35,010 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 234 transitions, 2626 flow [2023-01-28 10:58:35,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 99.14285714285714) internal successors, (2082), 21 states have internal predecessors, (2082), 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 10:58:35,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:35,011 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:58:35,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 10:58:35,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:35,217 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:35,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:35,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1735626719, now seen corresponding path program 13 times [2023-01-28 10:58:35,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:35,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039289035] [2023-01-28 10:58:35,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:35,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:35,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:35,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039289035] [2023-01-28 10:58:35,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039289035] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:35,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596649730] [2023-01-28 10:58:35,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:58:35,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:35,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:58:35,309 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:58:35,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 10:58:35,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:35,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 10:58:35,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:58:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:35,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:58:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:35,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596649730] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:58:35,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:58:35,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-01-28 10:58:35,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089620828] [2023-01-28 10:58:35,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:58:35,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 10:58:35,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:35,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 10:58:35,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-01-28 10:58:35,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 273 [2023-01-28 10:58:35,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 234 transitions, 2626 flow. Second operand has 18 states, 18 states have (on average 99.11111111111111) internal successors, (1784), 18 states have internal predecessors, (1784), 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 10:58:35,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:35,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 273 [2023-01-28 10:58:35,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:35,965 INFO L130 PetriNetUnfolder]: 1735/2659 cut-off events. [2023-01-28 10:58:35,965 INFO L131 PetriNetUnfolder]: For 19320/19324 co-relation queries the response was YES. [2023-01-28 10:58:35,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16244 conditions, 2659 events. 1735/2659 cut-off events. For 19320/19324 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 12503 event pairs, 318 based on Foata normal form. 32/2688 useless extension candidates. Maximal degree in co-relation 16198. Up to 1226 conditions per place. [2023-01-28 10:58:35,980 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 253 selfloop transitions, 79 changer transitions 0/341 dead transitions. [2023-01-28 10:58:35,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 341 transitions, 4241 flow [2023-01-28 10:58:35,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 10:58:35,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 10:58:35,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 941 transitions. [2023-01-28 10:58:35,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.382987382987383 [2023-01-28 10:58:35,982 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 941 transitions. [2023-01-28 10:58:35,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 941 transitions. [2023-01-28 10:58:35,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:35,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 941 transitions. [2023-01-28 10:58:35,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 104.55555555555556) internal successors, (941), 9 states have internal predecessors, (941), 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 10:58:35,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 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 10:58:35,984 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 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 10:58:35,984 INFO L175 Difference]: Start difference. First operand has 129 places, 234 transitions, 2626 flow. Second operand 9 states and 941 transitions. [2023-01-28 10:58:35,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 341 transitions, 4241 flow [2023-01-28 10:58:36,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 341 transitions, 4026 flow, removed 74 selfloop flow, removed 4 redundant places. [2023-01-28 10:58:36,027 INFO L231 Difference]: Finished difference. Result has 137 places, 242 transitions, 2872 flow [2023-01-28 10:58:36,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2872, PETRI_PLACES=137, PETRI_TRANSITIONS=242} [2023-01-28 10:58:36,028 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 107 predicate places. [2023-01-28 10:58:36,028 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 242 transitions, 2872 flow [2023-01-28 10:58:36,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 99.11111111111111) internal successors, (1784), 18 states have internal predecessors, (1784), 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 10:58:36,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:36,028 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:58:36,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 10:58:36,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-28 10:58:36,233 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:36,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:36,233 INFO L85 PathProgramCache]: Analyzing trace with hash -408139775, now seen corresponding path program 14 times [2023-01-28 10:58:36,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:36,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887386125] [2023-01-28 10:58:36,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:36,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:36,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:36,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:36,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887386125] [2023-01-28 10:58:36,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887386125] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:36,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354979505] [2023-01-28 10:58:36,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:58:36,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:36,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:58:36,394 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:58:36,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 10:58:36,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:58:36,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:58:36,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 10:58:36,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:58:36,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:36,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:58:36,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:36,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354979505] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:58:36,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:58:36,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-01-28 10:58:36,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553335331] [2023-01-28 10:58:36,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:58:36,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 10:58:36,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:36,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 10:58:36,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2023-01-28 10:58:36,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 273 [2023-01-28 10:58:36,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 242 transitions, 2872 flow. Second operand has 21 states, 21 states have (on average 99.14285714285714) internal successors, (2082), 21 states have internal predecessors, (2082), 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 10:58:36,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:36,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 273 [2023-01-28 10:58:36,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:37,613 INFO L130 PetriNetUnfolder]: 2498/3791 cut-off events. [2023-01-28 10:58:37,613 INFO L131 PetriNetUnfolder]: For 32432/32444 co-relation queries the response was YES. [2023-01-28 10:58:37,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24540 conditions, 3791 events. 2498/3791 cut-off events. For 32432/32444 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18722 event pairs, 326 based on Foata normal form. 32/3814 useless extension candidates. Maximal degree in co-relation 24490. Up to 1487 conditions per place. [2023-01-28 10:58:37,637 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 282 selfloop transitions, 179 changer transitions 0/470 dead transitions. [2023-01-28 10:58:37,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 470 transitions, 5879 flow [2023-01-28 10:58:37,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 10:58:37,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 10:58:37,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1902 transitions. [2023-01-28 10:58:37,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38705738705738707 [2023-01-28 10:58:37,640 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1902 transitions. [2023-01-28 10:58:37,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1902 transitions. [2023-01-28 10:58:37,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:37,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1902 transitions. [2023-01-28 10:58:37,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 105.66666666666667) internal successors, (1902), 18 states have internal predecessors, (1902), 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 10:58:37,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 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 10:58:37,644 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 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 10:58:37,644 INFO L175 Difference]: Start difference. First operand has 137 places, 242 transitions, 2872 flow. Second operand 18 states and 1902 transitions. [2023-01-28 10:58:37,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 470 transitions, 5879 flow [2023-01-28 10:58:37,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 470 transitions, 5664 flow, removed 72 selfloop flow, removed 4 redundant places. [2023-01-28 10:58:37,725 INFO L231 Difference]: Finished difference. Result has 155 places, 296 transitions, 3960 flow [2023-01-28 10:58:37,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2754, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3960, PETRI_PLACES=155, PETRI_TRANSITIONS=296} [2023-01-28 10:58:37,725 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 125 predicate places. [2023-01-28 10:58:37,726 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 296 transitions, 3960 flow [2023-01-28 10:58:37,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 99.14285714285714) internal successors, (2082), 21 states have internal predecessors, (2082), 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 10:58:37,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:37,726 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:58:37,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 10:58:37,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 10:58:37,929 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:37,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:37,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1644877099, now seen corresponding path program 15 times [2023-01-28 10:58:37,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:37,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220892116] [2023-01-28 10:58:37,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:37,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:38,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:58:38,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:38,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220892116] [2023-01-28 10:58:38,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220892116] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:38,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830588546] [2023-01-28 10:58:38,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:58:38,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:38,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:58:38,063 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:58:38,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 10:58:38,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:58:38,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:58:38,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 10:58:38,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:58:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:58:38,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:58:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:58:38,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830588546] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:58:38,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:58:38,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-01-28 10:58:38,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339254363] [2023-01-28 10:58:38,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:58:38,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 10:58:38,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:38,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 10:58:38,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2023-01-28 10:58:38,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 273 [2023-01-28 10:58:38,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 296 transitions, 3960 flow. Second operand has 21 states, 21 states have (on average 99.14285714285714) internal successors, (2082), 21 states have internal predecessors, (2082), 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 10:58:38,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:38,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 273 [2023-01-28 10:58:38,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:39,055 INFO L130 PetriNetUnfolder]: 2548/3878 cut-off events. [2023-01-28 10:58:39,055 INFO L131 PetriNetUnfolder]: For 38879/38905 co-relation queries the response was YES. [2023-01-28 10:58:39,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26825 conditions, 3878 events. 2548/3878 cut-off events. For 38879/38905 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19365 event pairs, 520 based on Foata normal form. 44/3919 useless extension candidates. Maximal degree in co-relation 26770. Up to 1964 conditions per place. [2023-01-28 10:58:39,086 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 281 selfloop transitions, 126 changer transitions 0/416 dead transitions. [2023-01-28 10:58:39,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 416 transitions, 5984 flow [2023-01-28 10:58:39,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 10:58:39,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 10:58:39,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1053 transitions. [2023-01-28 10:58:39,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2023-01-28 10:58:39,088 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1053 transitions. [2023-01-28 10:58:39,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1053 transitions. [2023-01-28 10:58:39,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:39,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1053 transitions. [2023-01-28 10:58:39,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 105.3) internal successors, (1053), 10 states have internal predecessors, (1053), 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 10:58:39,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 273.0) internal successors, (3003), 11 states have internal predecessors, (3003), 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 10:58:39,090 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 273.0) internal successors, (3003), 11 states have internal predecessors, (3003), 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 10:58:39,090 INFO L175 Difference]: Start difference. First operand has 155 places, 296 transitions, 3960 flow. Second operand 10 states and 1053 transitions. [2023-01-28 10:58:39,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 416 transitions, 5984 flow [2023-01-28 10:58:39,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 416 transitions, 5683 flow, removed 100 selfloop flow, removed 8 redundant places. [2023-01-28 10:58:39,195 INFO L231 Difference]: Finished difference. Result has 160 places, 326 transitions, 4533 flow [2023-01-28 10:58:39,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3706, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4533, PETRI_PLACES=160, PETRI_TRANSITIONS=326} [2023-01-28 10:58:39,195 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2023-01-28 10:58:39,195 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 326 transitions, 4533 flow [2023-01-28 10:58:39,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 99.14285714285714) internal successors, (2082), 21 states have internal predecessors, (2082), 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 10:58:39,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:39,196 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:58:39,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-28 10:58:39,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:39,401 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:39,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:39,401 INFO L85 PathProgramCache]: Analyzing trace with hash -975380431, now seen corresponding path program 16 times [2023-01-28 10:58:39,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:39,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564377573] [2023-01-28 10:58:39,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:39,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:58:39,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:39,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564377573] [2023-01-28 10:58:39,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564377573] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:39,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941974166] [2023-01-28 10:58:39,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:58:39,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:39,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:58:39,522 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:58:39,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 10:58:39,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:58:39,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:58:39,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 10:58:39,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:58:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:58:39,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:58:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:58:39,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941974166] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:58:39,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:58:39,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-01-28 10:58:39,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413441136] [2023-01-28 10:58:39,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:58:39,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 10:58:39,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:39,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 10:58:39,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-01-28 10:58:39,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 273 [2023-01-28 10:58:39,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 326 transitions, 4533 flow. Second operand has 19 states, 19 states have (on average 96.36842105263158) internal successors, (1831), 19 states have internal predecessors, (1831), 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 10:58:39,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:39,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 273 [2023-01-28 10:58:39,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:40,968 INFO L130 PetriNetUnfolder]: 2642/4011 cut-off events. [2023-01-28 10:58:40,968 INFO L131 PetriNetUnfolder]: For 40575/40575 co-relation queries the response was YES. [2023-01-28 10:58:40,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27928 conditions, 4011 events. 2642/4011 cut-off events. For 40575/40575 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19866 event pairs, 321 based on Foata normal form. 26/4037 useless extension candidates. Maximal degree in co-relation 27869. Up to 1584 conditions per place. [2023-01-28 10:58:41,001 INFO L137 encePairwiseOnDemand]: 263/273 looper letters, 353 selfloop transitions, 244 changer transitions 0/597 dead transitions. [2023-01-28 10:58:41,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 597 transitions, 8564 flow [2023-01-28 10:58:41,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 10:58:41,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 10:58:41,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3119 transitions. [2023-01-28 10:58:41,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36854543306156207 [2023-01-28 10:58:41,004 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3119 transitions. [2023-01-28 10:58:41,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3119 transitions. [2023-01-28 10:58:41,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:41,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3119 transitions. [2023-01-28 10:58:41,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 100.61290322580645) internal successors, (3119), 31 states have internal predecessors, (3119), 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 10:58:41,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 273.0) internal successors, (8736), 32 states have internal predecessors, (8736), 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 10:58:41,010 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 273.0) internal successors, (8736), 32 states have internal predecessors, (8736), 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 10:58:41,011 INFO L175 Difference]: Start difference. First operand has 160 places, 326 transitions, 4533 flow. Second operand 31 states and 3119 transitions. [2023-01-28 10:58:41,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 597 transitions, 8564 flow [2023-01-28 10:58:41,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 597 transitions, 8395 flow, removed 77 selfloop flow, removed 4 redundant places. [2023-01-28 10:58:41,131 INFO L231 Difference]: Finished difference. Result has 191 places, 408 transitions, 6026 flow [2023-01-28 10:58:41,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=4423, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=6026, PETRI_PLACES=191, PETRI_TRANSITIONS=408} [2023-01-28 10:58:41,131 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 161 predicate places. [2023-01-28 10:58:41,131 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 408 transitions, 6026 flow [2023-01-28 10:58:41,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 96.36842105263158) internal successors, (1831), 19 states have internal predecessors, (1831), 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 10:58:41,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:41,132 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:58:41,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-28 10:58:41,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:41,337 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:41,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:41,337 INFO L85 PathProgramCache]: Analyzing trace with hash 561744499, now seen corresponding path program 17 times [2023-01-28 10:58:41,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:41,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786441971] [2023-01-28 10:58:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:41,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:41,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:58:41,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:41,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786441971] [2023-01-28 10:58:41,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786441971] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:41,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070917882] [2023-01-28 10:58:41,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:58:41,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:41,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:58:41,425 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:58:41,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 10:58:41,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:58:41,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:58:41,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 10:58:41,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:58:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:58:41,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:58:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:58:41,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070917882] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:58:41,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:58:41,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2023-01-28 10:58:41,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130098345] [2023-01-28 10:58:41,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:58:41,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 10:58:41,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:41,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 10:58:41,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-01-28 10:58:41,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 273 [2023-01-28 10:58:41,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 408 transitions, 6026 flow. Second operand has 17 states, 17 states have (on average 96.70588235294117) internal successors, (1644), 17 states have internal predecessors, (1644), 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 10:58:41,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:41,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 273 [2023-01-28 10:58:41,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:42,649 INFO L130 PetriNetUnfolder]: 2608/3945 cut-off events. [2023-01-28 10:58:42,649 INFO L131 PetriNetUnfolder]: For 43084/43084 co-relation queries the response was YES. [2023-01-28 10:58:42,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28677 conditions, 3945 events. 2608/3945 cut-off events. For 43084/43084 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 19312 event pairs, 345 based on Foata normal form. 26/3971 useless extension candidates. Maximal degree in co-relation 28614. Up to 1634 conditions per place. [2023-01-28 10:58:42,683 INFO L137 encePairwiseOnDemand]: 263/273 looper letters, 354 selfloop transitions, 203 changer transitions 0/557 dead transitions. [2023-01-28 10:58:42,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 557 transitions, 8646 flow [2023-01-28 10:58:42,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 10:58:42,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 10:58:42,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1920 transitions. [2023-01-28 10:58:42,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37015615962984383 [2023-01-28 10:58:42,688 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1920 transitions. [2023-01-28 10:58:42,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1920 transitions. [2023-01-28 10:58:42,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:42,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1920 transitions. [2023-01-28 10:58:42,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 101.05263157894737) internal successors, (1920), 19 states have internal predecessors, (1920), 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 10:58:42,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 273.0) internal successors, (5460), 20 states have internal predecessors, (5460), 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 10:58:42,692 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 273.0) internal successors, (5460), 20 states have internal predecessors, (5460), 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 10:58:42,692 INFO L175 Difference]: Start difference. First operand has 191 places, 408 transitions, 6026 flow. Second operand 19 states and 1920 transitions. [2023-01-28 10:58:42,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 557 transitions, 8646 flow [2023-01-28 10:58:42,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 557 transitions, 8182 flow, removed 110 selfloop flow, removed 8 redundant places. [2023-01-28 10:58:42,838 INFO L231 Difference]: Finished difference. Result has 204 places, 413 transitions, 6026 flow [2023-01-28 10:58:42,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=5467, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6026, PETRI_PLACES=204, PETRI_TRANSITIONS=413} [2023-01-28 10:58:42,838 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 174 predicate places. [2023-01-28 10:58:42,838 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 413 transitions, 6026 flow [2023-01-28 10:58:42,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 96.70588235294117) internal successors, (1644), 17 states have internal predecessors, (1644), 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 10:58:42,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:42,839 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:58:42,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-28 10:58:43,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:43,044 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:43,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:43,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1034602387, now seen corresponding path program 18 times [2023-01-28 10:58:43,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:43,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717864999] [2023-01-28 10:58:43,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:43,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:43,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:43,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:43,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717864999] [2023-01-28 10:58:43,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717864999] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:43,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296596014] [2023-01-28 10:58:43,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:58:43,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:43,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:58:43,126 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:58:43,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 10:58:43,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 10:58:43,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:58:43,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 10:58:43,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:58:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:43,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:58:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:58:43,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296596014] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:58:43,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:58:43,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-01-28 10:58:43,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858173899] [2023-01-28 10:58:43,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:58:43,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 10:58:43,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:43,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 10:58:43,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-01-28 10:58:43,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 273 [2023-01-28 10:58:43,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 413 transitions, 6026 flow. Second operand has 21 states, 21 states have (on average 99.14285714285714) internal successors, (2082), 21 states have internal predecessors, (2082), 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 10:58:43,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:43,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 273 [2023-01-28 10:58:43,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:44,234 INFO L130 PetriNetUnfolder]: 2549/3864 cut-off events. [2023-01-28 10:58:44,234 INFO L131 PetriNetUnfolder]: For 42182/42195 co-relation queries the response was YES. [2023-01-28 10:58:44,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28278 conditions, 3864 events. 2549/3864 cut-off events. For 42182/42195 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19122 event pairs, 342 based on Foata normal form. 52/3907 useless extension candidates. Maximal degree in co-relation 28212. Up to 1565 conditions per place. [2023-01-28 10:58:44,264 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 294 selfloop transitions, 229 changer transitions 0/547 dead transitions. [2023-01-28 10:58:44,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 547 transitions, 8188 flow [2023-01-28 10:58:44,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 10:58:44,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 10:58:44,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1592 transitions. [2023-01-28 10:58:44,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3887667887667888 [2023-01-28 10:58:44,266 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1592 transitions. [2023-01-28 10:58:44,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1592 transitions. [2023-01-28 10:58:44,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:44,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1592 transitions. [2023-01-28 10:58:44,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 106.13333333333334) internal successors, (1592), 15 states have internal predecessors, (1592), 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 10:58:44,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 273.0) internal successors, (4368), 16 states have internal predecessors, (4368), 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 10:58:44,269 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 273.0) internal successors, (4368), 16 states have internal predecessors, (4368), 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 10:58:44,269 INFO L175 Difference]: Start difference. First operand has 204 places, 413 transitions, 6026 flow. Second operand 15 states and 1592 transitions. [2023-01-28 10:58:44,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 547 transitions, 8188 flow [2023-01-28 10:58:44,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 547 transitions, 7947 flow, removed 9 selfloop flow, removed 12 redundant places. [2023-01-28 10:58:44,383 INFO L231 Difference]: Finished difference. Result has 206 places, 420 transitions, 6404 flow [2023-01-28 10:58:44,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=5793, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6404, PETRI_PLACES=206, PETRI_TRANSITIONS=420} [2023-01-28 10:58:44,383 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 176 predicate places. [2023-01-28 10:58:44,383 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 420 transitions, 6404 flow [2023-01-28 10:58:44,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 99.14285714285714) internal successors, (2082), 21 states have internal predecessors, (2082), 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 10:58:44,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:44,384 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:58:44,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-28 10:58:44,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-01-28 10:58:44,590 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:44,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:44,590 INFO L85 PathProgramCache]: Analyzing trace with hash 849317859, now seen corresponding path program 19 times [2023-01-28 10:58:44,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:44,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173537171] [2023-01-28 10:58:44,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:44,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:58:44,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:44,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173537171] [2023-01-28 10:58:44,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173537171] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:44,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511971222] [2023-01-28 10:58:44,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:58:44,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:44,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:58:44,701 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:58:44,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 10:58:44,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:44,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 10:58:44,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:58:44,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:58:44,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:58:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:58:44,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511971222] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:58:44,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:58:44,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-01-28 10:58:44,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399153564] [2023-01-28 10:58:44,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:58:44,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 10:58:44,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:44,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 10:58:44,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-01-28 10:58:44,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 273 [2023-01-28 10:58:44,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 420 transitions, 6404 flow. Second operand has 20 states, 20 states have (on average 99.0) internal successors, (1980), 20 states have internal predecessors, (1980), 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 10:58:44,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:44,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 273 [2023-01-28 10:58:44,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:45,575 INFO L130 PetriNetUnfolder]: 2519/3804 cut-off events. [2023-01-28 10:58:45,576 INFO L131 PetriNetUnfolder]: For 45361/45372 co-relation queries the response was YES. [2023-01-28 10:58:45,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28647 conditions, 3804 events. 2519/3804 cut-off events. For 45361/45372 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 18595 event pairs, 406 based on Foata normal form. 26/3821 useless extension candidates. Maximal degree in co-relation 28580. Up to 1553 conditions per place. [2023-01-28 10:58:45,609 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 267 selfloop transitions, 182 changer transitions 0/473 dead transitions. [2023-01-28 10:58:45,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 473 transitions, 7759 flow [2023-01-28 10:58:45,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 10:58:45,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 10:58:45,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 940 transitions. [2023-01-28 10:58:45,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38258038258038257 [2023-01-28 10:58:45,610 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 940 transitions. [2023-01-28 10:58:45,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 940 transitions. [2023-01-28 10:58:45,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:45,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 940 transitions. [2023-01-28 10:58:45,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 104.44444444444444) internal successors, (940), 9 states have internal predecessors, (940), 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 10:58:45,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 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 10:58:45,682 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 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 10:58:45,682 INFO L175 Difference]: Start difference. First operand has 206 places, 420 transitions, 6404 flow. Second operand 9 states and 940 transitions. [2023-01-28 10:58:45,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 473 transitions, 7759 flow [2023-01-28 10:58:45,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 473 transitions, 7262 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-01-28 10:58:45,807 INFO L231 Difference]: Finished difference. Result has 201 places, 422 transitions, 6478 flow [2023-01-28 10:58:45,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=5892, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6478, PETRI_PLACES=201, PETRI_TRANSITIONS=422} [2023-01-28 10:58:45,808 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 171 predicate places. [2023-01-28 10:58:45,808 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 422 transitions, 6478 flow [2023-01-28 10:58:45,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 99.0) internal successors, (1980), 20 states have internal predecessors, (1980), 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 10:58:45,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:45,808 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:58:45,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-01-28 10:58:46,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-01-28 10:58:46,013 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:46,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:46,014 INFO L85 PathProgramCache]: Analyzing trace with hash 103220131, now seen corresponding path program 20 times [2023-01-28 10:58:46,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:46,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401621938] [2023-01-28 10:58:46,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:46,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:58:46,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:46,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401621938] [2023-01-28 10:58:46,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401621938] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:46,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284984725] [2023-01-28 10:58:46,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:58:46,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:46,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:58:46,140 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:58:46,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 10:58:46,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:58:46,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:58:46,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 10:58:46,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:58:46,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:58:46,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:58:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:58:46,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284984725] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:58:46,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:58:46,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-01-28 10:58:46,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202151674] [2023-01-28 10:58:46,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:58:46,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 10:58:46,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:58:46,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 10:58:46,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-01-28 10:58:46,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 273 [2023-01-28 10:58:46,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 422 transitions, 6478 flow. Second operand has 20 states, 20 states have (on average 99.0) internal successors, (1980), 20 states have internal predecessors, (1980), 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 10:58:46,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:58:46,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 273 [2023-01-28 10:58:46,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:58:47,122 INFO L130 PetriNetUnfolder]: 2488/3741 cut-off events. [2023-01-28 10:58:47,122 INFO L131 PetriNetUnfolder]: For 47088/47095 co-relation queries the response was YES. [2023-01-28 10:58:47,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28605 conditions, 3741 events. 2488/3741 cut-off events. For 47088/47095 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 18057 event pairs, 729 based on Foata normal form. 30/3762 useless extension candidates. Maximal degree in co-relation 28538. Up to 2986 conditions per place. [2023-01-28 10:58:47,156 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 342 selfloop transitions, 96 changer transitions 0/462 dead transitions. [2023-01-28 10:58:47,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 462 transitions, 7628 flow [2023-01-28 10:58:47,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 10:58:47,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 10:58:47,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 934 transitions. [2023-01-28 10:58:47,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38013838013838014 [2023-01-28 10:58:47,157 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 934 transitions. [2023-01-28 10:58:47,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 934 transitions. [2023-01-28 10:58:47,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:58:47,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 934 transitions. [2023-01-28 10:58:47,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 103.77777777777777) internal successors, (934), 9 states have internal predecessors, (934), 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 10:58:47,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 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 10:58:47,160 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 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 10:58:47,160 INFO L175 Difference]: Start difference. First operand has 201 places, 422 transitions, 6478 flow. Second operand 9 states and 934 transitions. [2023-01-28 10:58:47,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 462 transitions, 7628 flow [2023-01-28 10:58:47,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 462 transitions, 7404 flow, removed 24 selfloop flow, removed 7 redundant places. [2023-01-28 10:58:47,319 INFO L231 Difference]: Finished difference. Result has 202 places, 422 transitions, 6444 flow [2023-01-28 10:58:47,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=6149, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6444, PETRI_PLACES=202, PETRI_TRANSITIONS=422} [2023-01-28 10:58:47,319 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 172 predicate places. [2023-01-28 10:58:47,319 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 422 transitions, 6444 flow [2023-01-28 10:58:47,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 99.0) internal successors, (1980), 20 states have internal predecessors, (1980), 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 10:58:47,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:58:47,320 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 10:58:47,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-28 10:58:47,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:47,525 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:58:47,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:58:47,525 INFO L85 PathProgramCache]: Analyzing trace with hash 108858239, now seen corresponding path program 2 times [2023-01-28 10:58:47,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:58:47,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677826706] [2023-01-28 10:58:47,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:58:47,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:58:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:58:48,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:48,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:58:48,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677826706] [2023-01-28 10:58:48,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677826706] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:58:48,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002381828] [2023-01-28 10:58:48,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:58:48,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:58:48,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:58:48,615 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:58:48,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 10:58:48,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:58:48,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:58:48,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-28 10:58:48,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:58:48,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:58:48,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-01-28 10:58:49,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:58:49,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-01-28 10:58:49,580 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:58:49,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:58:49,584 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:58:49,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 76 [2023-01-28 10:58:49,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:58:49,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:58:50,290 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~M~0 0) (let ((.cse5 (+ c_~A~0.offset (* 4 c_~M~0))) (.cse4 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork1_~i~0 4)))) (and (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse0 (select .cse3 .cse5)) (.cse2 (select .cse3 .cse4)) (.cse1 (select .cse3 c_~A~0.offset))) (or (<= .cse0 .cse1) (= .cse2 .cse0) (<= .cse2 c_~max1~0) (<= .cse1 c_~max2~0))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse7 (select .cse8 .cse5)) (.cse6 (select .cse8 .cse4))) (or (= .cse6 .cse7) (<= .cse7 c_~max2~0) (< c_~max2~0 (select .cse8 c_~A~0.offset)) (<= .cse6 c_~max1~0))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse10 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse9 (select .cse10 c_~A~0.offset))) (or (= c_~max1~0 .cse9) (< .cse9 (select .cse10 .cse5)) (< c_~max1~0 (select .cse10 .cse4)) (<= .cse9 c_~max2~0))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse12 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse13 (select .cse12 .cse4)) (.cse11 (select .cse12 c_~A~0.offset))) (or (< .cse11 (select .cse12 .cse5)) (= .cse13 .cse11) (<= .cse13 c_~max1~0) (<= .cse11 c_~max2~0))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse14 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse15 (select .cse14 .cse4))) (or (< c_~max2~0 (select .cse14 .cse5)) (< c_~max2~0 (select .cse14 c_~A~0.offset)) (= .cse15 c_~max2~0) (<= .cse15 c_~max1~0))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse17 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse16 (select .cse17 .cse5))) (or (<= .cse16 c_~max2~0) (< c_~max2~0 (select .cse17 c_~A~0.offset)) (< c_~max1~0 (select .cse17 .cse4)) (= c_~max1~0 .cse16))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse20 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse19 (select .cse20 c_~A~0.offset)) (.cse18 (select .cse20 .cse5))) (or (<= .cse18 .cse19) (< c_~max1~0 (select .cse20 .cse4)) (<= .cse19 c_~max2~0) (= c_~max1~0 .cse18))))) (or (= c_~max1~0 c_~max2~0) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse21 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (or (< c_~max2~0 (select .cse21 .cse5)) (< c_~max2~0 (select .cse21 c_~A~0.offset)) (< c_~max1~0 (select .cse21 .cse4))))))))) is different from false [2023-01-28 10:58:50,510 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~M~0 0) (let ((.cse4 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork1_~i~0 4))) (.cse5 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse1 (select .cse3 c_~A~0.offset)) (.cse0 (select .cse3 .cse5)) (.cse2 (select .cse3 .cse4))) (or (<= .cse0 .cse1) (<= .cse1 c_~max2~0) (= .cse0 .cse2) (<= .cse2 c_~max1~0))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse8 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse7 (select .cse8 c_~A~0.offset)) (.cse6 (select .cse8 .cse5))) (or (<= .cse6 .cse7) (<= .cse7 c_~max2~0) (= c_~max1~0 .cse6) (< c_~max1~0 (select .cse8 .cse4)))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse11 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse9 (select .cse11 c_~A~0.offset)) (.cse10 (select .cse11 .cse4))) (or (= .cse9 .cse10) (<= .cse9 c_~max2~0) (< .cse9 (select .cse11 .cse5)) (<= .cse10 c_~max1~0))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse12 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse13 (select .cse12 .cse4))) (or (< c_~max2~0 (select .cse12 c_~A~0.offset)) (< c_~max2~0 (select .cse12 .cse5)) (<= .cse13 c_~max1~0) (= c_~max2~0 .cse13))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse15 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse14 (select .cse15 c_~A~0.offset))) (or (<= .cse14 c_~max2~0) (= c_~max1~0 .cse14) (< .cse14 (select .cse15 .cse5)) (< c_~max1~0 (select .cse15 .cse4)))))) (or (= c_~max1~0 c_~max2~0) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse16 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (or (< c_~max2~0 (select .cse16 c_~A~0.offset)) (< c_~max2~0 (select .cse16 .cse5)) (< c_~max1~0 (select .cse16 .cse4)))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse17 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse19 (select .cse17 .cse4)) (.cse18 (select .cse17 .cse5))) (or (< c_~max2~0 (select .cse17 c_~A~0.offset)) (= .cse18 .cse19) (<= .cse19 c_~max1~0) (<= .cse18 c_~max2~0))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse21 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse20 (select .cse21 .cse5))) (or (= c_~max1~0 .cse20) (< c_~max2~0 (select .cse21 c_~A~0.offset)) (<= .cse20 c_~max2~0) (< c_~max1~0 (select .cse21 .cse4))))))))) is different from false [2023-01-28 10:58:50,647 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 10:58:50,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3307 treesize of output 2934 [2023-01-28 10:58:50,762 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-28 10:58:50,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1835 treesize of output 1826 [2023-01-28 10:58:50,842 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-28 10:58:50,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1805 treesize of output 1766 [2023-01-28 10:58:50,906 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-28 10:58:50,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1745 treesize of output 1714 [2023-01-28 10:58:50,972 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-28 10:58:50,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1693 treesize of output 1688 [2023-01-28 10:58:51,071 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-28 10:58:51,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1667 treesize of output 1665 [2023-01-28 10:58:51,141 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-28 10:58:51,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1644 treesize of output 1619 [2023-01-28 10:58:51,209 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-28 10:58:51,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1598 treesize of output 1604 [2023-01-28 10:58:51,302 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-28 10:58:51,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1583 treesize of output 1574 [2023-01-28 10:58:51,340 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-28 10:58:51,386 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-28 10:58:51,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1553 treesize of output 1518 [2023-01-28 10:58:51,468 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-28 10:58:51,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1497 treesize of output 1490 [2023-01-28 10:58:51,564 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-28 10:58:51,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1469 treesize of output 1471 [2023-01-28 10:58:51,660 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-28 10:58:51,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1450 treesize of output 1433 [2023-01-28 10:58:51,768 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-28 10:58:51,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1412 treesize of output 1391 [2023-01-28 10:58:51,864 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-28 10:58:51,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1370 treesize of output 1370 [2023-01-28 10:58:51,956 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-28 10:58:51,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1349 treesize of output 1326 [2023-01-28 10:58:52,053 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-28 10:58:52,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1305 treesize of output 1304 [2023-01-28 11:02:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:02:05,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002381828] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:02:05,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:02:05,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 37 [2023-01-28 11:02:05,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220572950] [2023-01-28 11:02:05,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:02:05,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-28 11:02:05,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:02:05,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-28 11:02:05,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1207, Unknown=2, NotChecked=142, Total=1482 [2023-01-28 11:02:05,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 273 [2023-01-28 11:02:05,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 422 transitions, 6444 flow. Second operand has 39 states, 39 states have (on average 70.7948717948718) internal successors, (2761), 39 states have internal predecessors, (2761), 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 11:02:05,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:02:05,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 273 [2023-01-28 11:02:05,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:02:23,879 INFO L130 PetriNetUnfolder]: 6074/9547 cut-off events. [2023-01-28 11:02:23,879 INFO L131 PetriNetUnfolder]: For 133966/133966 co-relation queries the response was YES. [2023-01-28 11:02:23,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72841 conditions, 9547 events. 6074/9547 cut-off events. For 133966/133966 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 59367 event pairs, 297 based on Foata normal form. 10/9557 useless extension candidates. Maximal degree in co-relation 72774. Up to 4884 conditions per place. [2023-01-28 11:02:23,953 INFO L137 encePairwiseOnDemand]: 256/273 looper letters, 767 selfloop transitions, 661 changer transitions 18/1446 dead transitions. [2023-01-28 11:02:23,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 1446 transitions, 22528 flow [2023-01-28 11:02:23,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-01-28 11:02:23,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-01-28 11:02:23,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 5102 transitions. [2023-01-28 11:02:23,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2875176105945337 [2023-01-28 11:02:23,958 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 5102 transitions. [2023-01-28 11:02:23,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 5102 transitions. [2023-01-28 11:02:23,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:02:23,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 5102 transitions. [2023-01-28 11:02:23,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 78.49230769230769) internal successors, (5102), 65 states have internal predecessors, (5102), 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 11:02:23,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 273.0) internal successors, (18018), 66 states have internal predecessors, (18018), 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 11:02:23,970 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 273.0) internal successors, (18018), 66 states have internal predecessors, (18018), 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 11:02:23,971 INFO L175 Difference]: Start difference. First operand has 202 places, 422 transitions, 6444 flow. Second operand 65 states and 5102 transitions. [2023-01-28 11:02:23,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 1446 transitions, 22528 flow [2023-01-28 11:02:24,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 1446 transitions, 21758 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-01-28 11:02:24,709 INFO L231 Difference]: Finished difference. Result has 286 places, 1008 transitions, 18203 flow [2023-01-28 11:02:24,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=6267, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=18203, PETRI_PLACES=286, PETRI_TRANSITIONS=1008} [2023-01-28 11:02:24,709 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 256 predicate places. [2023-01-28 11:02:24,709 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 1008 transitions, 18203 flow [2023-01-28 11:02:24,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 70.7948717948718) internal successors, (2761), 39 states have internal predecessors, (2761), 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 11:02:24,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:02:24,710 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 11:02:24,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-28 11:02:24,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:02:24,915 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 11:02:24,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:02:24,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1055356433, now seen corresponding path program 3 times [2023-01-28 11:02:24,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:02:24,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763758265] [2023-01-28 11:02:24,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:02:24,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:02:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:02:25,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:02:25,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:02:25,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763758265] [2023-01-28 11:02:25,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763758265] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:02:25,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583357327] [2023-01-28 11:02:25,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:02:25,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:02:25,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:02:25,834 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:02:25,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 11:02:25,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:02:25,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:02:25,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-28 11:02:25,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:02:26,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:02:26,641 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:02:26,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 81 [2023-01-28 11:02:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:02:26,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:02:28,633 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:02:28,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 371 treesize of output 607 [2023-01-28 11:04:23,538 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-01-28 11:04:49,650 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-01-28 11:06:04,806 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-01-28 11:07:53,321 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-01-28 11:09:27,045 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-01-28 11:10:04,257 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-01-28 11:11:15,254 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. Received shutdown request... [2023-01-28 11:12:07,284 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 11:12:07,284 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 11:12:07,290 WARN L238 SmtUtils]: Removed 2 from assertion stack [2023-01-28 11:12:07,291 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-01-28 11:12:07,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-28 11:12:07,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-28 11:12:07,497 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 26ms.. [2023-01-28 11:12:07,499 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-01-28 11:12:07,499 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-01-28 11:12:07,499 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-01-28 11:12:07,499 INFO L445 BasicCegarLoop]: Path program histogram: [20, 3, 1, 1, 1] [2023-01-28 11:12:07,509 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 11:12:07,510 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 11:12:07,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 11:12:07 BasicIcfg [2023-01-28 11:12:07,511 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 11:12:07,511 INFO L158 Benchmark]: Toolchain (without parser) took 850158.98ms. Allocated memory was 362.8MB in the beginning and 1.6GB in the end (delta: 1.3GB). Free memory was 309.5MB in the beginning and 1.0GB in the end (delta: -701.1MB). Peak memory consumption was 1.0GB. Max. memory is 16.0GB. [2023-01-28 11:12:07,512 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 362.8MB. Free memory was 309.5MB in the beginning and 309.2MB in the end (delta: 304.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 11:12:07,512 INFO L158 Benchmark]: CACSL2BoogieTranslator took 182.33ms. Allocated memory is still 362.8MB. Free memory was 309.5MB in the beginning and 297.9MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-28 11:12:07,512 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.55ms. Allocated memory is still 362.8MB. Free memory was 297.9MB in the beginning and 295.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 11:12:07,512 INFO L158 Benchmark]: Boogie Preprocessor took 18.65ms. Allocated memory is still 362.8MB. Free memory was 295.8MB in the beginning and 294.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 11:12:07,512 INFO L158 Benchmark]: RCFGBuilder took 404.88ms. Allocated memory is still 362.8MB. Free memory was 293.7MB in the beginning and 271.7MB in the end (delta: 22.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-01-28 11:12:07,512 INFO L158 Benchmark]: TraceAbstraction took 849517.81ms. Allocated memory was 362.8MB in the beginning and 1.6GB in the end (delta: 1.3GB). Free memory was 271.7MB in the beginning and 1.0GB in the end (delta: -738.9MB). Peak memory consumption was 966.1MB. Max. memory is 16.0GB. [2023-01-28 11:12:07,513 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 362.8MB. Free memory was 309.5MB in the beginning and 309.2MB in the end (delta: 304.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 182.33ms. Allocated memory is still 362.8MB. Free memory was 309.5MB in the beginning and 297.9MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 31.55ms. Allocated memory is still 362.8MB. Free memory was 297.9MB in the beginning and 295.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 18.65ms. Allocated memory is still 362.8MB. Free memory was 295.8MB in the beginning and 294.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 404.88ms. Allocated memory is still 362.8MB. Free memory was 293.7MB in the beginning and 271.7MB in the end (delta: 22.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 849517.81ms. Allocated memory was 362.8MB in the beginning and 1.6GB in the end (delta: 1.3GB). Free memory was 271.7MB in the beginning and 1.0GB in the end (delta: -738.9MB). Peak memory consumption was 966.1MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.5s, 129 PlacesBefore, 30 PlacesAfterwards, 131 TransitionsBefore, 24 TransitionsAfterwards, 1320 CoEnabledTransitionPairs, 8 FixpointIterations, 73 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 15 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 129 TotalNumberOfCompositions, 1615 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1511, independent: 1489, independent conditional: 0, independent unconditional: 1489, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 724, independent: 714, independent conditional: 0, independent unconditional: 714, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1511, independent: 775, independent conditional: 0, independent unconditional: 775, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 724, unknown conditional: 0, unknown unconditional: 724] , Statistics on independence cache: Total cache size (in pairs): 53, Positive cache size: 51, Positive conditional cache size: 0, Positive unconditional cache size: 51, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 26ms.. - TimeoutResultAtElement [Line: 93]: 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 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 26ms.. - TimeoutResultAtElement [Line: 94]: 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 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 26ms.. - TimeoutResultAtElement [Line: 92]: 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 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 26ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 163 locations, 4 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: 849.4s, OverallIterations: 26, TraceHistogramMax: 2, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 44.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4255 SdHoareTripleChecker+Valid, 8.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4255 mSDsluCounter, 753 SdHoareTripleChecker+Invalid, 7.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1521 IncrementalHoareTripleChecker+Unchecked, 654 mSDsCounter, 181 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15517 IncrementalHoareTripleChecker+Invalid, 17219 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 181 mSolverCounterUnsat, 99 mSDtfsCounter, 15517 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1562 GetRequests, 799 SyntacticMatches, 39 SemanticMatches, 724 ConstructedPredicates, 4 IntricatePredicates, 2 DeprecatedPredicates, 6616 ImplicationChecksByTransitivity, 29.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18203occurred in iteration=25, InterpolantAutomatonStates: 404, 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: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 210.8s InterpolantComputationTime, 1147 NumberOfCodeBlocks, 1136 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 1629 ConstructedInterpolants, 13 QuantifiedInterpolants, 18573 SizeOfPredicates, 257 NumberOfNonLiveVariables, 4916 ConjunctsInSsa, 437 ConjunctsInUnsatCore, 71 InterpolantComputations, 3 PerfectInterpolantSequences, 147/349 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