/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 21:17:39,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 21:17:39,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 21:17:39,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 21:17:39,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 21:17:39,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 21:17:39,073 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 21:17:39,075 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 21:17:39,076 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 21:17:39,076 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 21:17:39,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 21:17:39,094 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 21:17:39,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 21:17:39,095 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 21:17:39,096 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 21:17:39,096 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 21:17:39,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 21:17:39,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 21:17:39,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 21:17:39,099 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 21:17:39,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 21:17:39,106 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 21:17:39,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 21:17:39,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 21:17:39,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 21:17:39,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 21:17:39,111 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 21:17:39,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 21:17:39,112 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 21:17:39,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 21:17:39,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 21:17:39,114 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 21:17:39,114 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 21:17:39,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 21:17:39,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 21:17:39,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 21:17:39,122 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 [2023-01-27 21:17:39,137 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 21:17:39,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 21:17:39,138 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 21:17:39,138 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 21:17:39,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 21:17:39,139 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 21:17:39,139 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 21:17:39,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 21:17:39,139 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 21:17:39,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 21:17:39,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 21:17:39,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 21:17:39,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 21:17:39,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 21:17:39,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 21:17:39,140 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 21:17:39,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 21:17:39,140 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 21:17:39,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 21:17:39,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 21:17:39,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 21:17:39,140 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 21:17:39,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 21:17:39,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:17:39,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 21:17:39,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 21:17:39,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 21:17:39,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 21:17:39,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 21:17:39,141 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 21:17:39,141 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 21:17:39,141 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 21:17:39,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 21:17:39,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 21:17:39,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 21:17:39,356 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 21:17:39,357 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 21:17:39,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-01-27 21:17:40,371 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 21:17:40,561 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 21:17:40,561 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-01-27 21:17:40,568 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ce4de7c0/8f0e8e1833374aeda05eb8c02366e56f/FLAG194a5abc3 [2023-01-27 21:17:40,581 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ce4de7c0/8f0e8e1833374aeda05eb8c02366e56f [2023-01-27 21:17:40,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 21:17:40,584 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 21:17:40,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 21:17:40,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 21:17:40,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 21:17:40,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:17:40" (1/1) ... [2023-01-27 21:17:40,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7002cfbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:17:40, skipping insertion in model container [2023-01-27 21:17:40,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:17:40" (1/1) ... [2023-01-27 21:17:40,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 21:17:40,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 21:17:40,731 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-bad-dot-product.wvr.c[2865,2878] [2023-01-27 21:17:40,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:17:40,743 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 21:17:40,758 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-bad-dot-product.wvr.c[2865,2878] [2023-01-27 21:17:40,760 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:17:40,766 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:17:40,766 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:17:40,770 INFO L208 MainTranslator]: Completed translation [2023-01-27 21:17:40,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:17:40 WrapperNode [2023-01-27 21:17:40,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 21:17:40,771 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 21:17:40,771 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 21:17:40,772 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 21:17:40,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:17:40" (1/1) ... [2023-01-27 21:17:40,782 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:17:40" (1/1) ... [2023-01-27 21:17:40,812 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 22, statements flattened = 280 [2023-01-27 21:17:40,813 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 21:17:40,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 21:17:40,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 21:17:40,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 21:17:40,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:17:40" (1/1) ... [2023-01-27 21:17:40,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:17:40" (1/1) ... [2023-01-27 21:17:40,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:17:40" (1/1) ... [2023-01-27 21:17:40,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:17:40" (1/1) ... [2023-01-27 21:17:40,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:17:40" (1/1) ... [2023-01-27 21:17:40,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:17:40" (1/1) ... [2023-01-27 21:17:40,832 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:17:40" (1/1) ... [2023-01-27 21:17:40,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:17:40" (1/1) ... [2023-01-27 21:17:40,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 21:17:40,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 21:17:40,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 21:17:40,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 21:17:40,837 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:17:40" (1/1) ... [2023-01-27 21:17:40,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:17:40,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:17:40,859 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) [2023-01-27 21:17:40,872 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 [2023-01-27 21:17:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 21:17:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 21:17:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 21:17:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 21:17:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 21:17:40,894 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 21:17:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 21:17:40,894 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 21:17:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-27 21:17:40,895 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-27 21:17:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 21:17:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 21:17:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 21:17:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 21:17:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 21:17:40,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 21:17:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 21:17:40,896 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 21:17:40,977 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 21:17:40,979 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 21:17:41,323 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 21:17:41,448 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 21:17:41,448 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-01-27 21:17:41,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:17:41 BoogieIcfgContainer [2023-01-27 21:17:41,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 21:17:41,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 21:17:41,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 21:17:41,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 21:17:41,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 09:17:40" (1/3) ... [2023-01-27 21:17:41,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f743abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:17:41, skipping insertion in model container [2023-01-27 21:17:41,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:17:40" (2/3) ... [2023-01-27 21:17:41,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f743abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:17:41, skipping insertion in model container [2023-01-27 21:17:41,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:17:41" (3/3) ... [2023-01-27 21:17:41,455 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2023-01-27 21:17:41,466 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 21:17:41,466 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 21:17:41,466 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 21:17:41,551 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 21:17:41,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 239 transitions, 502 flow [2023-01-27 21:17:41,686 INFO L130 PetriNetUnfolder]: 25/236 cut-off events. [2023-01-27 21:17:41,686 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 21:17:41,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 236 events. 25/236 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 310 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 182. Up to 2 conditions per place. [2023-01-27 21:17:41,691 INFO L82 GeneralOperation]: Start removeDead. Operand has 224 places, 239 transitions, 502 flow [2023-01-27 21:17:41,698 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 226 transitions, 470 flow [2023-01-27 21:17:41,701 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 21:17:41,714 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 226 transitions, 470 flow [2023-01-27 21:17:41,717 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 226 transitions, 470 flow [2023-01-27 21:17:41,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 226 transitions, 470 flow [2023-01-27 21:17:41,765 INFO L130 PetriNetUnfolder]: 25/226 cut-off events. [2023-01-27 21:17:41,766 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 21:17:41,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 226 events. 25/226 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 307 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 182. Up to 2 conditions per place. [2023-01-27 21:17:41,770 INFO L119 LiptonReduction]: Number of co-enabled transitions 6720 [2023-01-27 21:17:46,134 INFO L134 LiptonReduction]: Checked pairs total: 7402 [2023-01-27 21:17:46,134 INFO L136 LiptonReduction]: Total number of compositions: 236 [2023-01-27 21:17:46,169 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 21:17:46,177 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;@1bc0ce19, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 21:17:46,177 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 21:17:46,186 INFO L130 PetriNetUnfolder]: 8/33 cut-off events. [2023-01-27 21:17:46,186 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 21:17:46,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:17:46,187 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] [2023-01-27 21:17:46,188 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)] === [2023-01-27 21:17:46,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:17:46,191 INFO L85 PathProgramCache]: Analyzing trace with hash -699137499, now seen corresponding path program 1 times [2023-01-27 21:17:46,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:17:46,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966249365] [2023-01-27 21:17:46,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:46,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:17:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:17:46,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:17:46,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966249365] [2023-01-27 21:17:46,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966249365] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:17:46,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:17:46,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 21:17:46,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903826804] [2023-01-27 21:17:46,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:17:46,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 21:17:46,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:17:46,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 21:17:46,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-27 21:17:46,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 475 [2023-01-27 21:17:46,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 199.75) internal successors, (799), 4 states have internal predecessors, (799), 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) [2023-01-27 21:17:46,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:17:46,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 475 [2023-01-27 21:17:46,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:17:46,729 INFO L130 PetriNetUnfolder]: 1162/1537 cut-off events. [2023-01-27 21:17:46,729 INFO L131 PetriNetUnfolder]: For 91/91 co-relation queries the response was YES. [2023-01-27 21:17:46,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3168 conditions, 1537 events. 1162/1537 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5522 event pairs, 394 based on Foata normal form. 0/1016 useless extension candidates. Maximal degree in co-relation 2710. Up to 899 conditions per place. [2023-01-27 21:17:46,736 INFO L137 encePairwiseOnDemand]: 470/475 looper letters, 44 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2023-01-27 21:17:46,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 220 flow [2023-01-27 21:17:46,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 21:17:46,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 21:17:46,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 829 transitions. [2023-01-27 21:17:46,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363157894736842 [2023-01-27 21:17:46,748 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 829 transitions. [2023-01-27 21:17:46,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 829 transitions. [2023-01-27 21:17:46,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:17:46,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 829 transitions. [2023-01-27 21:17:46,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 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) [2023-01-27 21:17:46,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 475.0) internal successors, (2375), 5 states have internal predecessors, (2375), 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) [2023-01-27 21:17:46,763 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 475.0) internal successors, (2375), 5 states have internal predecessors, (2375), 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) [2023-01-27 21:17:46,764 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 86 flow. Second operand 4 states and 829 transitions. [2023-01-27 21:17:46,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 220 flow [2023-01-27 21:17:46,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 50 transitions, 204 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-27 21:17:46,770 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 95 flow [2023-01-27 21:17:46,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2023-01-27 21:17:46,774 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2023-01-27 21:17:46,774 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 95 flow [2023-01-27 21:17:46,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 199.75) internal successors, (799), 4 states have internal predecessors, (799), 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) [2023-01-27 21:17:46,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:17:46,775 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] [2023-01-27 21:17:46,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 21:17:46,776 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)] === [2023-01-27 21:17:46,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:17:46,781 INFO L85 PathProgramCache]: Analyzing trace with hash -120965922, now seen corresponding path program 1 times [2023-01-27 21:17:46,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:17:46,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878394812] [2023-01-27 21:17:46,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:46,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:17:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:17:46,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:17:46,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878394812] [2023-01-27 21:17:46,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878394812] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:17:46,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:17:46,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 21:17:46,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512573675] [2023-01-27 21:17:46,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:17:46,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 21:17:46,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:17:46,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 21:17:46,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 21:17:46,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 475 [2023-01-27 21:17:46,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 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) [2023-01-27 21:17:46,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:17:46,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 475 [2023-01-27 21:17:46,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:17:47,131 INFO L130 PetriNetUnfolder]: 1930/2561 cut-off events. [2023-01-27 21:17:47,132 INFO L131 PetriNetUnfolder]: For 392/570 co-relation queries the response was YES. [2023-01-27 21:17:47,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5940 conditions, 2561 events. 1930/2561 cut-off events. For 392/570 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10098 event pairs, 519 based on Foata normal form. 179/2075 useless extension candidates. Maximal degree in co-relation 1614. Up to 1436 conditions per place. [2023-01-27 21:17:47,143 INFO L137 encePairwiseOnDemand]: 470/475 looper letters, 52 selfloop transitions, 4 changer transitions 1/60 dead transitions. [2023-01-27 21:17:47,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 60 transitions, 276 flow [2023-01-27 21:17:47,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 21:17:47,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 21:17:47,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 683 transitions. [2023-01-27 21:17:47,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4792982456140351 [2023-01-27 21:17:47,145 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 683 transitions. [2023-01-27 21:17:47,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 683 transitions. [2023-01-27 21:17:47,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:17:47,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 683 transitions. [2023-01-27 21:17:47,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 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) [2023-01-27 21:17:47,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 475.0) internal successors, (1900), 4 states have internal predecessors, (1900), 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) [2023-01-27 21:17:47,149 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 475.0) internal successors, (1900), 4 states have internal predecessors, (1900), 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) [2023-01-27 21:17:47,149 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 95 flow. Second operand 3 states and 683 transitions. [2023-01-27 21:17:47,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 60 transitions, 276 flow [2023-01-27 21:17:47,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 60 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 21:17:47,156 INFO L231 Difference]: Finished difference. Result has 36 places, 38 transitions, 117 flow [2023-01-27 21:17:47,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=36, PETRI_TRANSITIONS=38} [2023-01-27 21:17:47,157 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2023-01-27 21:17:47,157 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 38 transitions, 117 flow [2023-01-27 21:17:47,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 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) [2023-01-27 21:17:47,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:17:47,157 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] [2023-01-27 21:17:47,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 21:17:47,158 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)] === [2023-01-27 21:17:47,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:17:47,159 INFO L85 PathProgramCache]: Analyzing trace with hash 568274986, now seen corresponding path program 1 times [2023-01-27 21:17:47,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:17:47,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178632131] [2023-01-27 21:17:47,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:47,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:17:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:17:47,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:17:47,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178632131] [2023-01-27 21:17:47,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178632131] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:17:47,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:17:47,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:17:47,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699229271] [2023-01-27 21:17:47,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:17:47,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:17:47,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:17:47,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:17:47,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:17:47,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 475 [2023-01-27 21:17:47,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 38 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 162.4) internal successors, (812), 5 states have internal predecessors, (812), 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) [2023-01-27 21:17:47,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:17:47,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 475 [2023-01-27 21:17:47,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:17:47,780 INFO L130 PetriNetUnfolder]: 4453/5922 cut-off events. [2023-01-27 21:17:47,781 INFO L131 PetriNetUnfolder]: For 1504/1504 co-relation queries the response was YES. [2023-01-27 21:17:47,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14415 conditions, 5922 events. 4453/5922 cut-off events. For 1504/1504 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 26577 event pairs, 2338 based on Foata normal form. 122/4506 useless extension candidates. Maximal degree in co-relation 6160. Up to 3038 conditions per place. [2023-01-27 21:17:47,804 INFO L137 encePairwiseOnDemand]: 469/475 looper letters, 78 selfloop transitions, 6 changer transitions 0/86 dead transitions. [2023-01-27 21:17:47,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 86 transitions, 426 flow [2023-01-27 21:17:47,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:17:47,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:17:47,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 866 transitions. [2023-01-27 21:17:47,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3646315789473684 [2023-01-27 21:17:47,806 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 866 transitions. [2023-01-27 21:17:47,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 866 transitions. [2023-01-27 21:17:47,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:17:47,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 866 transitions. [2023-01-27 21:17:47,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.2) internal successors, (866), 5 states have internal predecessors, (866), 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) [2023-01-27 21:17:47,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 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) [2023-01-27 21:17:47,812 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 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) [2023-01-27 21:17:47,812 INFO L175 Difference]: Start difference. First operand has 36 places, 38 transitions, 117 flow. Second operand 5 states and 866 transitions. [2023-01-27 21:17:47,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 86 transitions, 426 flow [2023-01-27 21:17:47,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 86 transitions, 418 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 21:17:47,821 INFO L231 Difference]: Finished difference. Result has 42 places, 43 transitions, 169 flow [2023-01-27 21:17:47,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=169, PETRI_PLACES=42, PETRI_TRANSITIONS=43} [2023-01-27 21:17:47,822 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2023-01-27 21:17:47,824 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 43 transitions, 169 flow [2023-01-27 21:17:47,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 162.4) internal successors, (812), 5 states have internal predecessors, (812), 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) [2023-01-27 21:17:47,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:17:47,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:17:47,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 21:17:47,825 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)] === [2023-01-27 21:17:47,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:17:47,826 INFO L85 PathProgramCache]: Analyzing trace with hash 637640884, now seen corresponding path program 1 times [2023-01-27 21:17:47,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:17:47,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523104332] [2023-01-27 21:17:47,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:47,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:17:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:17:48,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:17:48,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523104332] [2023-01-27 21:17:48,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523104332] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:17:48,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757256785] [2023-01-27 21:17:48,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:48,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:17:48,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:17:48,039 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) [2023-01-27 21:17:48,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 21:17:48,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:48,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 21:17:48,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:17:48,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:17:48,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:17:48,313 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 23 treesize of output 7 [2023-01-27 21:17:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:17:48,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757256785] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:17:48,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:17:48,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2023-01-27 21:17:48,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769786756] [2023-01-27 21:17:48,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:17:48,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 21:17:48,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:17:48,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 21:17:48,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-01-27 21:17:48,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 475 [2023-01-27 21:17:48,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 43 transitions, 169 flow. Second operand has 13 states, 13 states have (on average 160.6153846153846) internal successors, (2088), 13 states have internal predecessors, (2088), 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) [2023-01-27 21:17:48,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:17:48,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 475 [2023-01-27 21:17:48,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:17:48,988 INFO L130 PetriNetUnfolder]: 6603/8803 cut-off events. [2023-01-27 21:17:48,989 INFO L131 PetriNetUnfolder]: For 3446/3446 co-relation queries the response was YES. [2023-01-27 21:17:48,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22508 conditions, 8803 events. 6603/8803 cut-off events. For 3446/3446 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 42366 event pairs, 3381 based on Foata normal form. 122/6628 useless extension candidates. Maximal degree in co-relation 14940. Up to 3038 conditions per place. [2023-01-27 21:17:49,026 INFO L137 encePairwiseOnDemand]: 469/475 looper letters, 121 selfloop transitions, 11 changer transitions 0/134 dead transitions. [2023-01-27 21:17:49,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 134 transitions, 697 flow [2023-01-27 21:17:49,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 21:17:49,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 21:17:49,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1383 transitions. [2023-01-27 21:17:49,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394736842105263 [2023-01-27 21:17:49,029 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1383 transitions. [2023-01-27 21:17:49,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1383 transitions. [2023-01-27 21:17:49,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:17:49,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1383 transitions. [2023-01-27 21:17:49,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 172.875) internal successors, (1383), 8 states have internal predecessors, (1383), 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) [2023-01-27 21:17:49,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 475.0) internal successors, (4275), 9 states have internal predecessors, (4275), 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) [2023-01-27 21:17:49,037 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 475.0) internal successors, (4275), 9 states have internal predecessors, (4275), 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) [2023-01-27 21:17:49,037 INFO L175 Difference]: Start difference. First operand has 42 places, 43 transitions, 169 flow. Second operand 8 states and 1383 transitions. [2023-01-27 21:17:49,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 134 transitions, 697 flow [2023-01-27 21:17:49,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 134 transitions, 693 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 21:17:49,083 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 241 flow [2023-01-27 21:17:49,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=241, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2023-01-27 21:17:49,084 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 15 predicate places. [2023-01-27 21:17:49,084 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 241 flow [2023-01-27 21:17:49,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 160.6153846153846) internal successors, (2088), 13 states have internal predecessors, (2088), 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) [2023-01-27 21:17:49,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:17:49,085 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, 1, 1] [2023-01-27 21:17:49,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 21:17:49,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:17:49,286 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)] === [2023-01-27 21:17:49,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:17:49,287 INFO L85 PathProgramCache]: Analyzing trace with hash -963449330, now seen corresponding path program 2 times [2023-01-27 21:17:49,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:17:49,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858159326] [2023-01-27 21:17:49,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:49,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:17:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:17:49,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:17:49,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858159326] [2023-01-27 21:17:49,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858159326] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:17:49,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:17:49,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 21:17:49,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931644817] [2023-01-27 21:17:49,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:17:49,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:17:49,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:17:49,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:17:49,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:17:49,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 475 [2023-01-27 21:17:49,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 177.6) internal successors, (888), 5 states have internal predecessors, (888), 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) [2023-01-27 21:17:49,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:17:49,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 475 [2023-01-27 21:17:49,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:17:49,958 INFO L130 PetriNetUnfolder]: 6604/8808 cut-off events. [2023-01-27 21:17:49,958 INFO L131 PetriNetUnfolder]: For 5547/5547 co-relation queries the response was YES. [2023-01-27 21:17:49,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24128 conditions, 8808 events. 6604/8808 cut-off events. For 5547/5547 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 42154 event pairs, 3131 based on Foata normal form. 3/6504 useless extension candidates. Maximal degree in co-relation 14672. Up to 7287 conditions per place. [2023-01-27 21:17:49,998 INFO L137 encePairwiseOnDemand]: 470/475 looper letters, 61 selfloop transitions, 3 changer transitions 4/70 dead transitions. [2023-01-27 21:17:49,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 447 flow [2023-01-27 21:17:49,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:17:49,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:17:50,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 916 transitions. [2023-01-27 21:17:50,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3856842105263158 [2023-01-27 21:17:50,001 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 916 transitions. [2023-01-27 21:17:50,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 916 transitions. [2023-01-27 21:17:50,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:17:50,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 916 transitions. [2023-01-27 21:17:50,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 183.2) internal successors, (916), 5 states have internal predecessors, (916), 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) [2023-01-27 21:17:50,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 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) [2023-01-27 21:17:50,005 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 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) [2023-01-27 21:17:50,005 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 241 flow. Second operand 5 states and 916 transitions. [2023-01-27 21:17:50,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 447 flow [2023-01-27 21:17:50,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 415 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-01-27 21:17:50,023 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 237 flow [2023-01-27 21:17:50,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2023-01-27 21:17:50,025 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 17 predicate places. [2023-01-27 21:17:50,025 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 237 flow [2023-01-27 21:17:50,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 177.6) internal successors, (888), 5 states have internal predecessors, (888), 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) [2023-01-27 21:17:50,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:17:50,026 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, 1, 1, 1] [2023-01-27 21:17:50,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 21:17:50,026 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)] === [2023-01-27 21:17:50,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:17:50,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1429325870, now seen corresponding path program 1 times [2023-01-27 21:17:50,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:17:50,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301052603] [2023-01-27 21:17:50,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:50,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:17:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-27 21:17:50,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:17:50,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301052603] [2023-01-27 21:17:50,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301052603] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:17:50,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057300473] [2023-01-27 21:17:50,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:50,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:17:50,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:17:50,125 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) [2023-01-27 21:17:50,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 21:17:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:50,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:17:50,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:17:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-27 21:17:50,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:17:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-27 21:17:50,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057300473] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 21:17:50,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 21:17:50,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-01-27 21:17:50,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944426372] [2023-01-27 21:17:50,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:17:50,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:17:50,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:17:50,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:17:50,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-01-27 21:17:50,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 475 [2023-01-27 21:17:50,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 237 flow. Second operand has 5 states, 5 states have (on average 181.8) internal successors, (909), 5 states have internal predecessors, (909), 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) [2023-01-27 21:17:50,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:17:50,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 475 [2023-01-27 21:17:50,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:17:50,831 INFO L130 PetriNetUnfolder]: 5990/8152 cut-off events. [2023-01-27 21:17:50,831 INFO L131 PetriNetUnfolder]: For 8947/9589 co-relation queries the response was YES. [2023-01-27 21:17:50,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22769 conditions, 8152 events. 5990/8152 cut-off events. For 8947/9589 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 41270 event pairs, 1923 based on Foata normal form. 642/6955 useless extension candidates. Maximal degree in co-relation 22740. Up to 4077 conditions per place. [2023-01-27 21:17:50,887 INFO L137 encePairwiseOnDemand]: 469/475 looper letters, 66 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2023-01-27 21:17:50,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 509 flow [2023-01-27 21:17:50,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:17:50,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:17:50,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 934 transitions. [2023-01-27 21:17:50,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932631578947368 [2023-01-27 21:17:50,889 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 934 transitions. [2023-01-27 21:17:50,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 934 transitions. [2023-01-27 21:17:50,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:17:50,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 934 transitions. [2023-01-27 21:17:50,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 186.8) internal successors, (934), 5 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) [2023-01-27 21:17:50,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 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) [2023-01-27 21:17:50,893 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 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) [2023-01-27 21:17:50,894 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 237 flow. Second operand 5 states and 934 transitions. [2023-01-27 21:17:50,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 509 flow [2023-01-27 21:17:50,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 73 transitions, 497 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-27 21:17:50,916 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 249 flow [2023-01-27 21:17:50,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2023-01-27 21:17:50,917 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 20 predicate places. [2023-01-27 21:17:50,917 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 249 flow [2023-01-27 21:17:50,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 181.8) internal successors, (909), 5 states have internal predecessors, (909), 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) [2023-01-27 21:17:50,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:17:50,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:17:50,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 21:17:51,122 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,SelfDestructingSolverStorable5 [2023-01-27 21:17:51,122 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)] === [2023-01-27 21:17:51,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:17:51,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1999844878, now seen corresponding path program 1 times [2023-01-27 21:17:51,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:17:51,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763076892] [2023-01-27 21:17:51,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:51,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:17:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:17:51,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:17:51,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763076892] [2023-01-27 21:17:51,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763076892] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:17:51,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:17:51,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:17:51,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684970498] [2023-01-27 21:17:51,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:17:51,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:17:51,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:17:51,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:17:51,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:17:51,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 475 [2023-01-27 21:17:51,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 163.2) internal successors, (816), 5 states have internal predecessors, (816), 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) [2023-01-27 21:17:51,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:17:51,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 475 [2023-01-27 21:17:51,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:17:51,842 INFO L130 PetriNetUnfolder]: 6264/8556 cut-off events. [2023-01-27 21:17:51,842 INFO L131 PetriNetUnfolder]: For 9787/10463 co-relation queries the response was YES. [2023-01-27 21:17:51,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26431 conditions, 8556 events. 6264/8556 cut-off events. For 9787/10463 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 42223 event pairs, 3638 based on Foata normal form. 779/8085 useless extension candidates. Maximal degree in co-relation 26401. Up to 5469 conditions per place. [2023-01-27 21:17:51,875 INFO L137 encePairwiseOnDemand]: 467/475 looper letters, 83 selfloop transitions, 8 changer transitions 0/93 dead transitions. [2023-01-27 21:17:51,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 93 transitions, 585 flow [2023-01-27 21:17:51,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:17:51,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:17:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 865 transitions. [2023-01-27 21:17:51,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3642105263157895 [2023-01-27 21:17:51,877 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 865 transitions. [2023-01-27 21:17:51,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 865 transitions. [2023-01-27 21:17:51,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:17:51,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 865 transitions. [2023-01-27 21:17:51,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.0) internal successors, (865), 5 states have internal predecessors, (865), 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) [2023-01-27 21:17:51,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 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) [2023-01-27 21:17:51,881 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 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) [2023-01-27 21:17:51,881 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 249 flow. Second operand 5 states and 865 transitions. [2023-01-27 21:17:51,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 93 transitions, 585 flow [2023-01-27 21:17:51,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 93 transitions, 575 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-27 21:17:51,897 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 300 flow [2023-01-27 21:17:51,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=300, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2023-01-27 21:17:51,898 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 23 predicate places. [2023-01-27 21:17:51,898 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 300 flow [2023-01-27 21:17:51,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 163.2) internal successors, (816), 5 states have internal predecessors, (816), 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) [2023-01-27 21:17:51,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:17:51,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:17:51,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 21:17:51,898 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)] === [2023-01-27 21:17:51,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:17:51,899 INFO L85 PathProgramCache]: Analyzing trace with hash 800859454, now seen corresponding path program 2 times [2023-01-27 21:17:51,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:17:51,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439481611] [2023-01-27 21:17:51,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:51,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:17:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:52,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:17:52,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:17:52,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439481611] [2023-01-27 21:17:52,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439481611] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:17:52,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:17:52,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-27 21:17:52,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817641164] [2023-01-27 21:17:52,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:17:52,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 21:17:52,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:17:52,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 21:17:52,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-01-27 21:17:52,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 475 [2023-01-27 21:17:52,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 300 flow. Second operand has 8 states, 8 states have (on average 153.25) internal successors, (1226), 8 states have internal predecessors, (1226), 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) [2023-01-27 21:17:52,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:17:52,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 475 [2023-01-27 21:17:52,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:17:52,659 INFO L130 PetriNetUnfolder]: 6520/8911 cut-off events. [2023-01-27 21:17:52,660 INFO L131 PetriNetUnfolder]: For 12687/13385 co-relation queries the response was YES. [2023-01-27 21:17:52,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28906 conditions, 8911 events. 6520/8911 cut-off events. For 12687/13385 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 44134 event pairs, 3696 based on Foata normal form. 788/8394 useless extension candidates. Maximal degree in co-relation 28874. Up to 5466 conditions per place. [2023-01-27 21:17:52,697 INFO L137 encePairwiseOnDemand]: 467/475 looper letters, 83 selfloop transitions, 9 changer transitions 0/94 dead transitions. [2023-01-27 21:17:52,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 94 transitions, 631 flow [2023-01-27 21:17:52,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 21:17:52,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 21:17:52,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 975 transitions. [2023-01-27 21:17:52,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34210526315789475 [2023-01-27 21:17:52,700 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 975 transitions. [2023-01-27 21:17:52,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 975 transitions. [2023-01-27 21:17:52,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:17:52,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 975 transitions. [2023-01-27 21:17:52,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 162.5) internal successors, (975), 6 states have internal predecessors, (975), 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) [2023-01-27 21:17:52,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 475.0) internal successors, (3325), 7 states have internal predecessors, (3325), 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) [2023-01-27 21:17:52,705 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 475.0) internal successors, (3325), 7 states have internal predecessors, (3325), 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) [2023-01-27 21:17:52,705 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 300 flow. Second operand 6 states and 975 transitions. [2023-01-27 21:17:52,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 94 transitions, 631 flow [2023-01-27 21:17:52,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 94 transitions, 626 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 21:17:52,724 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 329 flow [2023-01-27 21:17:52,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=329, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2023-01-27 21:17:52,727 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 27 predicate places. [2023-01-27 21:17:52,727 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 329 flow [2023-01-27 21:17:52,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 153.25) internal successors, (1226), 8 states have internal predecessors, (1226), 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) [2023-01-27 21:17:52,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:17:52,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:17:52,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 21:17:52,730 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)] === [2023-01-27 21:17:52,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:17:52,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1628528424, now seen corresponding path program 3 times [2023-01-27 21:17:52,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:17:52,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866538186] [2023-01-27 21:17:52,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:52,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:17:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:17:53,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:17:53,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866538186] [2023-01-27 21:17:53,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866538186] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:17:53,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:17:53,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-27 21:17:53,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852938573] [2023-01-27 21:17:53,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:17:53,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 21:17:53,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:17:53,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 21:17:53,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-01-27 21:17:53,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 475 [2023-01-27 21:17:53,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 329 flow. Second operand has 7 states, 7 states have (on average 150.71428571428572) internal successors, (1055), 7 states have internal predecessors, (1055), 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) [2023-01-27 21:17:53,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:17:53,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 475 [2023-01-27 21:17:53,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:17:53,607 INFO L130 PetriNetUnfolder]: 5942/8166 cut-off events. [2023-01-27 21:17:53,607 INFO L131 PetriNetUnfolder]: For 15503/16163 co-relation queries the response was YES. [2023-01-27 21:17:53,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27660 conditions, 8166 events. 5942/8166 cut-off events. For 15503/16163 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 40226 event pairs, 3407 based on Foata normal form. 750/7738 useless extension candidates. Maximal degree in co-relation 27626. Up to 5466 conditions per place. [2023-01-27 21:17:53,650 INFO L137 encePairwiseOnDemand]: 468/475 looper letters, 81 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2023-01-27 21:17:53,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 92 transitions, 643 flow [2023-01-27 21:17:53,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 21:17:53,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 21:17:53,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 954 transitions. [2023-01-27 21:17:53,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33473684210526317 [2023-01-27 21:17:53,653 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 954 transitions. [2023-01-27 21:17:53,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 954 transitions. [2023-01-27 21:17:53,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:17:53,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 954 transitions. [2023-01-27 21:17:53,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.0) internal successors, (954), 6 states have internal predecessors, (954), 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) [2023-01-27 21:17:53,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 475.0) internal successors, (3325), 7 states have internal predecessors, (3325), 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) [2023-01-27 21:17:53,658 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 475.0) internal successors, (3325), 7 states have internal predecessors, (3325), 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) [2023-01-27 21:17:53,658 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 329 flow. Second operand 6 states and 954 transitions. [2023-01-27 21:17:53,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 92 transitions, 643 flow [2023-01-27 21:17:53,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 92 transitions, 630 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 21:17:53,679 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 352 flow [2023-01-27 21:17:53,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=352, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2023-01-27 21:17:53,680 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 29 predicate places. [2023-01-27 21:17:53,680 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 352 flow [2023-01-27 21:17:53,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.71428571428572) internal successors, (1055), 7 states have internal predecessors, (1055), 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) [2023-01-27 21:17:53,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:17:53,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:17:53,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 21:17:53,681 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)] === [2023-01-27 21:17:53,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:17:53,681 INFO L85 PathProgramCache]: Analyzing trace with hash -541050982, now seen corresponding path program 1 times [2023-01-27 21:17:53,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:17:53,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983445937] [2023-01-27 21:17:53,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:53,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:17:53,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:17:53,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:17:53,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983445937] [2023-01-27 21:17:53,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983445937] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:17:53,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447085886] [2023-01-27 21:17:53,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:53,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:17:53,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:17:53,811 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) [2023-01-27 21:17:53,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 21:17:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:53,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 21:17:53,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:17:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:17:53,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:17:53,989 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 23 treesize of output 7 [2023-01-27 21:17:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:17:54,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447085886] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:17:54,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:17:54,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-27 21:17:54,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523893354] [2023-01-27 21:17:54,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:17:54,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 21:17:54,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:17:54,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 21:17:54,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-01-27 21:17:54,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 475 [2023-01-27 21:17:54,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 352 flow. Second operand has 12 states, 12 states have (on average 161.41666666666666) internal successors, (1937), 12 states have internal predecessors, (1937), 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) [2023-01-27 21:17:54,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:17:54,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 475 [2023-01-27 21:17:54,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:17:54,665 INFO L130 PetriNetUnfolder]: 6213/8517 cut-off events. [2023-01-27 21:17:54,665 INFO L131 PetriNetUnfolder]: For 19639/20355 co-relation queries the response was YES. [2023-01-27 21:17:54,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30147 conditions, 8517 events. 6213/8517 cut-off events. For 19639/20355 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 42354 event pairs, 3393 based on Foata normal form. 819/8092 useless extension candidates. Maximal degree in co-relation 30112. Up to 2836 conditions per place. [2023-01-27 21:17:54,697 INFO L137 encePairwiseOnDemand]: 467/475 looper letters, 117 selfloop transitions, 15 changer transitions 0/134 dead transitions. [2023-01-27 21:17:54,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 134 transitions, 917 flow [2023-01-27 21:17:54,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 21:17:54,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 21:17:54,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1379 transitions. [2023-01-27 21:17:54,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36289473684210527 [2023-01-27 21:17:54,701 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1379 transitions. [2023-01-27 21:17:54,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1379 transitions. [2023-01-27 21:17:54,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:17:54,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1379 transitions. [2023-01-27 21:17:54,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 172.375) internal successors, (1379), 8 states have internal predecessors, (1379), 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) [2023-01-27 21:17:54,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 475.0) internal successors, (4275), 9 states have internal predecessors, (4275), 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) [2023-01-27 21:17:54,707 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 475.0) internal successors, (4275), 9 states have internal predecessors, (4275), 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) [2023-01-27 21:17:54,707 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 352 flow. Second operand 8 states and 1379 transitions. [2023-01-27 21:17:54,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 134 transitions, 917 flow [2023-01-27 21:17:54,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 134 transitions, 894 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-01-27 21:17:54,726 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 418 flow [2023-01-27 21:17:54,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=418, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2023-01-27 21:17:54,726 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 34 predicate places. [2023-01-27 21:17:54,726 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 418 flow [2023-01-27 21:17:54,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 161.41666666666666) internal successors, (1937), 12 states have internal predecessors, (1937), 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) [2023-01-27 21:17:54,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:17:54,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:17:54,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 21:17:54,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:17:54,932 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)] === [2023-01-27 21:17:54,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:17:54,932 INFO L85 PathProgramCache]: Analyzing trace with hash -2109067920, now seen corresponding path program 2 times [2023-01-27 21:17:54,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:17:54,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799193030] [2023-01-27 21:17:54,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:54,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:17:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:55,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:17:55,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:17:55,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799193030] [2023-01-27 21:17:55,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799193030] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:17:55,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972946343] [2023-01-27 21:17:55,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:17:55,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:17:55,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:17:55,141 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) [2023-01-27 21:17:55,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 21:17:55,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:17:55,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:17:55,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-27 21:17:55,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:17:55,257 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 202 treesize of output 198 [2023-01-27 21:17:55,353 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 18 treesize of output 20 [2023-01-27 21:17:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:17:55,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:17:55,420 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 41 treesize of output 25 [2023-01-27 21:17:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:17:55,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972946343] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:17:55,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:17:55,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-27 21:17:55,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872772798] [2023-01-27 21:17:55,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:17:55,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 21:17:55,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:17:55,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 21:17:55,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-01-27 21:17:55,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 475 [2023-01-27 21:17:55,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 418 flow. Second operand has 16 states, 16 states have (on average 152.4375) internal successors, (2439), 16 states have internal predecessors, (2439), 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) [2023-01-27 21:17:55,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:17:55,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 475 [2023-01-27 21:17:55,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:17:56,126 INFO L130 PetriNetUnfolder]: 6469/8877 cut-off events. [2023-01-27 21:17:56,126 INFO L131 PetriNetUnfolder]: For 22918/23632 co-relation queries the response was YES. [2023-01-27 21:17:56,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32578 conditions, 8877 events. 6469/8877 cut-off events. For 22918/23632 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 44561 event pairs, 3389 based on Foata normal form. 804/8380 useless extension candidates. Maximal degree in co-relation 32542. Up to 2833 conditions per place. [2023-01-27 21:17:56,165 INFO L137 encePairwiseOnDemand]: 467/475 looper letters, 117 selfloop transitions, 16 changer transitions 0/135 dead transitions. [2023-01-27 21:17:56,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 135 transitions, 972 flow [2023-01-27 21:17:56,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 21:17:56,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 21:17:56,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1465 transitions. [2023-01-27 21:17:56,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34269005847953216 [2023-01-27 21:17:56,169 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1465 transitions. [2023-01-27 21:17:56,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1465 transitions. [2023-01-27 21:17:56,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:17:56,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1465 transitions. [2023-01-27 21:17:56,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 162.77777777777777) internal successors, (1465), 9 states have internal predecessors, (1465), 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) [2023-01-27 21:17:56,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 475.0) internal successors, (4750), 10 states have internal predecessors, (4750), 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) [2023-01-27 21:17:56,176 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 475.0) internal successors, (4750), 10 states have internal predecessors, (4750), 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) [2023-01-27 21:17:56,176 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 418 flow. Second operand 9 states and 1465 transitions. [2023-01-27 21:17:56,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 135 transitions, 972 flow [2023-01-27 21:17:56,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 135 transitions, 941 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-01-27 21:17:56,204 INFO L231 Difference]: Finished difference. Result has 74 places, 63 transitions, 439 flow [2023-01-27 21:17:56,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=439, PETRI_PLACES=74, PETRI_TRANSITIONS=63} [2023-01-27 21:17:56,205 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 38 predicate places. [2023-01-27 21:17:56,205 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 63 transitions, 439 flow [2023-01-27 21:17:56,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 152.4375) internal successors, (2439), 16 states have internal predecessors, (2439), 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) [2023-01-27 21:17:56,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:17:56,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:17:56,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-27 21:17:56,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:17:56,412 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)] === [2023-01-27 21:17:56,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:17:56,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1281398950, now seen corresponding path program 3 times [2023-01-27 21:17:56,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:17:56,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360810789] [2023-01-27 21:17:56,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:56,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:17:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:17:56,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:17:56,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360810789] [2023-01-27 21:17:56,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360810789] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:17:56,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153634414] [2023-01-27 21:17:56,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:17:56,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:17:56,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:17:56,658 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) [2023-01-27 21:17:56,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 21:17:56,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 21:17:56,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:17:56,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-27 21:17:56,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:17:56,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:17:56,992 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 18 treesize of output 20 [2023-01-27 21:17:57,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:17:57,025 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 18 treesize of output 20 [2023-01-27 21:17:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:17:57,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:17:57,055 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_430 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_430) c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4))) (+ |c_thread1Thread1of1ForFork2_~j~0#1| 1))) is different from false [2023-01-27 21:17:57,087 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 157 treesize of output 133 [2023-01-27 21:17:57,093 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 27 treesize of output 21 [2023-01-27 21:17:57,096 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 28 treesize of output 16 [2023-01-27 21:17:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:17:57,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153634414] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:17:57,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:17:57,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2023-01-27 21:17:57,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975659054] [2023-01-27 21:17:57,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:17:57,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 21:17:57,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:17:57,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 21:17:57,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=311, Unknown=2, NotChecked=36, Total=420 [2023-01-27 21:17:57,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 475 [2023-01-27 21:17:57,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 63 transitions, 439 flow. Second operand has 21 states, 21 states have (on average 149.42857142857142) internal successors, (3138), 21 states have internal predecessors, (3138), 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) [2023-01-27 21:17:57,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:17:57,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 475 [2023-01-27 21:17:57,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:17:57,970 INFO L130 PetriNetUnfolder]: 5891/8132 cut-off events. [2023-01-27 21:17:57,970 INFO L131 PetriNetUnfolder]: For 25090/25758 co-relation queries the response was YES. [2023-01-27 21:17:57,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30533 conditions, 8132 events. 5891/8132 cut-off events. For 25090/25758 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40181 event pairs, 3100 based on Foata normal form. 758/7711 useless extension candidates. Maximal degree in co-relation 30495. Up to 2833 conditions per place. [2023-01-27 21:17:58,010 INFO L137 encePairwiseOnDemand]: 468/475 looper letters, 116 selfloop transitions, 16 changer transitions 0/134 dead transitions. [2023-01-27 21:17:58,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 134 transitions, 978 flow [2023-01-27 21:17:58,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 21:17:58,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 21:17:58,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1434 transitions. [2023-01-27 21:17:58,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3354385964912281 [2023-01-27 21:17:58,013 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1434 transitions. [2023-01-27 21:17:58,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1434 transitions. [2023-01-27 21:17:58,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:17:58,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1434 transitions. [2023-01-27 21:17:58,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 159.33333333333334) internal successors, (1434), 9 states have internal predecessors, (1434), 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) [2023-01-27 21:17:58,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 475.0) internal successors, (4750), 10 states have internal predecessors, (4750), 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) [2023-01-27 21:17:58,019 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 475.0) internal successors, (4750), 10 states have internal predecessors, (4750), 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) [2023-01-27 21:17:58,019 INFO L175 Difference]: Start difference. First operand has 74 places, 63 transitions, 439 flow. Second operand 9 states and 1434 transitions. [2023-01-27 21:17:58,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 134 transitions, 978 flow [2023-01-27 21:17:58,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 134 transitions, 947 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-01-27 21:17:58,046 INFO L231 Difference]: Finished difference. Result has 76 places, 64 transitions, 462 flow [2023-01-27 21:17:58,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=462, PETRI_PLACES=76, PETRI_TRANSITIONS=64} [2023-01-27 21:17:58,047 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 40 predicate places. [2023-01-27 21:17:58,047 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 64 transitions, 462 flow [2023-01-27 21:17:58,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 149.42857142857142) internal successors, (3138), 21 states have internal predecessors, (3138), 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) [2023-01-27 21:17:58,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:17:58,048 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, 1, 1, 1, 1, 1] [2023-01-27 21:17:58,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-27 21:17:58,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-01-27 21:17:58,253 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)] === [2023-01-27 21:17:58,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:17:58,253 INFO L85 PathProgramCache]: Analyzing trace with hash -935293517, now seen corresponding path program 1 times [2023-01-27 21:17:58,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:17:58,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348092247] [2023-01-27 21:17:58,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:58,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:17:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:17:58,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:17:58,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348092247] [2023-01-27 21:17:58,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348092247] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:17:58,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141915635] [2023-01-27 21:17:58,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:58,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:17:58,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:17:58,702 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) [2023-01-27 21:17:58,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 21:17:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:58,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 21:17:58,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:17:59,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:17:59,013 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 14 treesize of output 16 [2023-01-27 21:17:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:17:59,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:17:59,155 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_487 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_487) c_~A~0.base) (+ c_~A~0.offset (* 4 c_~M~0))) 1)) is different from false [2023-01-27 21:17:59,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:17:59,162 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 41 treesize of output 33 [2023-01-27 21:17:59,164 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 9 treesize of output 3 [2023-01-27 21:17:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:17:59,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141915635] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:17:59,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:17:59,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 34 [2023-01-27 21:17:59,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023562864] [2023-01-27 21:17:59,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:17:59,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-27 21:17:59,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:17:59,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-27 21:17:59,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1017, Unknown=1, NotChecked=64, Total=1190 [2023-01-27 21:17:59,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 475 [2023-01-27 21:17:59,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 64 transitions, 462 flow. Second operand has 35 states, 35 states have (on average 137.0) internal successors, (4795), 35 states have internal predecessors, (4795), 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) [2023-01-27 21:17:59,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:17:59,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 475 [2023-01-27 21:17:59,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:04,399 INFO L130 PetriNetUnfolder]: 29858/41055 cut-off events. [2023-01-27 21:18:04,399 INFO L131 PetriNetUnfolder]: For 137690/137690 co-relation queries the response was YES. [2023-01-27 21:18:04,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165913 conditions, 41055 events. 29858/41055 cut-off events. For 137690/137690 co-relation queries the response was YES. Maximal size of possible extension queue 1370. Compared 240635 event pairs, 5463 based on Foata normal form. 168/36833 useless extension candidates. Maximal degree in co-relation 117566. Up to 7003 conditions per place. [2023-01-27 21:18:04,614 INFO L137 encePairwiseOnDemand]: 450/475 looper letters, 516 selfloop transitions, 259 changer transitions 60/835 dead transitions. [2023-01-27 21:18:04,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 835 transitions, 7783 flow [2023-01-27 21:18:04,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-27 21:18:04,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-27 21:18:04,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5493 transitions. [2023-01-27 21:18:04,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3125462304409673 [2023-01-27 21:18:04,623 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5493 transitions. [2023-01-27 21:18:04,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5493 transitions. [2023-01-27 21:18:04,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:04,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5493 transitions. [2023-01-27 21:18:04,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 148.45945945945945) internal successors, (5493), 37 states have internal predecessors, (5493), 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) [2023-01-27 21:18:04,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 475.0) internal successors, (18050), 38 states have internal predecessors, (18050), 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) [2023-01-27 21:18:04,646 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 475.0) internal successors, (18050), 38 states have internal predecessors, (18050), 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) [2023-01-27 21:18:04,646 INFO L175 Difference]: Start difference. First operand has 76 places, 64 transitions, 462 flow. Second operand 37 states and 5493 transitions. [2023-01-27 21:18:04,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 835 transitions, 7783 flow [2023-01-27 21:18:05,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 835 transitions, 7393 flow, removed 72 selfloop flow, removed 7 redundant places. [2023-01-27 21:18:05,081 INFO L231 Difference]: Finished difference. Result has 129 places, 332 transitions, 3973 flow [2023-01-27 21:18:05,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3973, PETRI_PLACES=129, PETRI_TRANSITIONS=332} [2023-01-27 21:18:05,081 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 93 predicate places. [2023-01-27 21:18:05,081 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 332 transitions, 3973 flow [2023-01-27 21:18:05,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 137.0) internal successors, (4795), 35 states have internal predecessors, (4795), 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) [2023-01-27 21:18:05,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:05,082 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, 1, 1, 1, 1, 1] [2023-01-27 21:18:05,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-27 21:18:05,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:05,287 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)] === [2023-01-27 21:18:05,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:05,287 INFO L85 PathProgramCache]: Analyzing trace with hash 792253339, now seen corresponding path program 2 times [2023-01-27 21:18:05,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:05,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055462323] [2023-01-27 21:18:05,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:05,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:18:05,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:05,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055462323] [2023-01-27 21:18:05,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055462323] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:18:05,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776497393] [2023-01-27 21:18:05,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:18:05,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:05,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:18:05,973 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) [2023-01-27 21:18:05,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 21:18:06,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:18:06,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:18:06,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-27 21:18:06,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:18:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:18:06,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:18:06,346 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:18:06,346 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 19 treesize of output 15 [2023-01-27 21:18:06,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:18:06,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776497393] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:18:06,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:18:06,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 29 [2023-01-27 21:18:06,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338315321] [2023-01-27 21:18:06,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:18:06,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 21:18:06,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:06,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 21:18:06,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2023-01-27 21:18:06,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 475 [2023-01-27 21:18:06,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 332 transitions, 3973 flow. Second operand has 30 states, 30 states have (on average 141.3) internal successors, (4239), 30 states have internal predecessors, (4239), 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) [2023-01-27 21:18:06,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:06,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 475 [2023-01-27 21:18:06,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:13,232 INFO L130 PetriNetUnfolder]: 24795/34570 cut-off events. [2023-01-27 21:18:13,232 INFO L131 PetriNetUnfolder]: For 459669/459669 co-relation queries the response was YES. [2023-01-27 21:18:13,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236788 conditions, 34570 events. 24795/34570 cut-off events. For 459669/459669 co-relation queries the response was YES. Maximal size of possible extension queue 1124. Compared 202798 event pairs, 6417 based on Foata normal form. 1389/35959 useless extension candidates. Maximal degree in co-relation 216650. Up to 16319 conditions per place. [2023-01-27 21:18:13,691 INFO L137 encePairwiseOnDemand]: 457/475 looper letters, 686 selfloop transitions, 501 changer transitions 274/1461 dead transitions. [2023-01-27 21:18:13,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 1461 transitions, 21227 flow [2023-01-27 21:18:13,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-01-27 21:18:13,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-01-27 21:18:13,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 8878 transitions. [2023-01-27 21:18:13,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31150877192982457 [2023-01-27 21:18:13,702 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 8878 transitions. [2023-01-27 21:18:13,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 8878 transitions. [2023-01-27 21:18:13,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:13,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 8878 transitions. [2023-01-27 21:18:13,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 147.96666666666667) internal successors, (8878), 60 states have internal predecessors, (8878), 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) [2023-01-27 21:18:13,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 475.0) internal successors, (28975), 61 states have internal predecessors, (28975), 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) [2023-01-27 21:18:13,734 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 475.0) internal successors, (28975), 61 states have internal predecessors, (28975), 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) [2023-01-27 21:18:13,734 INFO L175 Difference]: Start difference. First operand has 129 places, 332 transitions, 3973 flow. Second operand 60 states and 8878 transitions. [2023-01-27 21:18:13,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 1461 transitions, 21227 flow [2023-01-27 21:18:15,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 1461 transitions, 20524 flow, removed 193 selfloop flow, removed 3 redundant places. [2023-01-27 21:18:15,891 INFO L231 Difference]: Finished difference. Result has 230 places, 746 transitions, 10979 flow [2023-01-27 21:18:15,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=3677, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=10979, PETRI_PLACES=230, PETRI_TRANSITIONS=746} [2023-01-27 21:18:15,891 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 194 predicate places. [2023-01-27 21:18:15,891 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 746 transitions, 10979 flow [2023-01-27 21:18:15,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 141.3) internal successors, (4239), 30 states have internal predecessors, (4239), 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) [2023-01-27 21:18:15,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:15,892 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, 1, 1, 1, 1, 1] [2023-01-27 21:18:15,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 21:18:16,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:16,097 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)] === [2023-01-27 21:18:16,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:16,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1301806927, now seen corresponding path program 3 times [2023-01-27 21:18:16,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:16,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403983015] [2023-01-27 21:18:16,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:16,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:18:16,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:16,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403983015] [2023-01-27 21:18:16,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403983015] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:18:16,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453152581] [2023-01-27 21:18:16,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:18:16,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:16,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:18:16,898 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) [2023-01-27 21:18:16,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 21:18:17,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 21:18:17,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:18:17,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 21:18:17,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:18:17,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:18:17,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:18:17,359 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:18:17,359 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 23 treesize of output 15 [2023-01-27 21:18:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:18:17,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453152581] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:18:17,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:18:17,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 33 [2023-01-27 21:18:17,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503558374] [2023-01-27 21:18:17,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:18:17,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-27 21:18:17,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:17,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-27 21:18:17,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2023-01-27 21:18:17,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 475 [2023-01-27 21:18:17,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 746 transitions, 10979 flow. Second operand has 33 states, 33 states have (on average 135.3939393939394) internal successors, (4468), 33 states have internal predecessors, (4468), 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) [2023-01-27 21:18:17,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:17,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 475 [2023-01-27 21:18:17,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:33,418 INFO L130 PetriNetUnfolder]: 43235/59184 cut-off events. [2023-01-27 21:18:33,418 INFO L131 PetriNetUnfolder]: For 1599924/1599924 co-relation queries the response was YES. [2023-01-27 21:18:34,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 502529 conditions, 59184 events. 43235/59184 cut-off events. For 1599924/1599924 co-relation queries the response was YES. Maximal size of possible extension queue 2224. Compared 362968 event pairs, 5376 based on Foata normal form. 148/59332 useless extension candidates. Maximal degree in co-relation 491492. Up to 26131 conditions per place. [2023-01-27 21:18:34,758 INFO L137 encePairwiseOnDemand]: 456/475 looper letters, 1906 selfloop transitions, 1731 changer transitions 62/3699 dead transitions. [2023-01-27 21:18:34,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 3699 transitions, 66486 flow [2023-01-27 21:18:34,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-01-27 21:18:34,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-01-27 21:18:34,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 7831 transitions. [2023-01-27 21:18:34,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2997511961722488 [2023-01-27 21:18:34,766 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 7831 transitions. [2023-01-27 21:18:34,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 7831 transitions. [2023-01-27 21:18:34,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:34,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 7831 transitions. [2023-01-27 21:18:34,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 142.38181818181818) internal successors, (7831), 55 states have internal predecessors, (7831), 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) [2023-01-27 21:18:34,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 475.0) internal successors, (26600), 56 states have internal predecessors, (26600), 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) [2023-01-27 21:18:34,956 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 475.0) internal successors, (26600), 56 states have internal predecessors, (26600), 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) [2023-01-27 21:18:34,956 INFO L175 Difference]: Start difference. First operand has 230 places, 746 transitions, 10979 flow. Second operand 55 states and 7831 transitions. [2023-01-27 21:18:34,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 3699 transitions, 66486 flow [2023-01-27 21:18:55,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 3699 transitions, 56400 flow, removed 5039 selfloop flow, removed 3 redundant places. [2023-01-27 21:18:55,598 INFO L231 Difference]: Finished difference. Result has 322 places, 2144 transitions, 35960 flow [2023-01-27 21:18:55,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=9170, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=35960, PETRI_PLACES=322, PETRI_TRANSITIONS=2144} [2023-01-27 21:18:55,599 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 286 predicate places. [2023-01-27 21:18:55,599 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 2144 transitions, 35960 flow [2023-01-27 21:18:55,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 135.3939393939394) internal successors, (4468), 33 states have internal predecessors, (4468), 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) [2023-01-27 21:18:55,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:55,600 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, 1, 1, 1, 1, 1] [2023-01-27 21:18:55,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-01-27 21:18:55,800 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,SelfDestructingSolverStorable14 [2023-01-27 21:18:55,800 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)] === [2023-01-27 21:18:55,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:55,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1203366245, now seen corresponding path program 4 times [2023-01-27 21:18:55,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:55,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903288193] [2023-01-27 21:18:55,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:55,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:56,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:18:56,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:56,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903288193] [2023-01-27 21:18:56,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903288193] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:18:56,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084740307] [2023-01-27 21:18:56,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:18:56,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:56,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:18:56,198 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) [2023-01-27 21:18:56,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-27 21:18:56,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:18:56,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:18:56,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-27 21:18:56,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:18:56,480 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 21:18:56,480 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 17 treesize of output 11 [2023-01-27 21:18:56,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:18:56,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:18:56,564 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:18:56,564 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 23 treesize of output 15 [2023-01-27 21:18:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:18:56,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084740307] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:18:56,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:18:56,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 31 [2023-01-27 21:18:56,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549405600] [2023-01-27 21:18:56,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:18:56,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 21:18:56,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:56,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 21:18:56,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2023-01-27 21:18:56,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 475 [2023-01-27 21:18:56,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 2144 transitions, 35960 flow. Second operand has 31 states, 31 states have (on average 141.2258064516129) internal successors, (4378), 31 states have internal predecessors, (4378), 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) [2023-01-27 21:18:56,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:56,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 475 [2023-01-27 21:18:56,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:19:47,202 INFO L130 PetriNetUnfolder]: 89215/122753 cut-off events. [2023-01-27 21:19:47,202 INFO L131 PetriNetUnfolder]: For 4433610/4433610 co-relation queries the response was YES. [2023-01-27 21:19:50,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1161170 conditions, 122753 events. 89215/122753 cut-off events. For 4433610/4433610 co-relation queries the response was YES. Maximal size of possible extension queue 4585. Compared 827249 event pairs, 7656 based on Foata normal form. 842/123595 useless extension candidates. Maximal degree in co-relation 1154409. Up to 54135 conditions per place. [2023-01-27 21:19:51,528 INFO L137 encePairwiseOnDemand]: 454/475 looper letters, 1939 selfloop transitions, 4719 changer transitions 192/6850 dead transitions. [2023-01-27 21:19:51,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 6850 transitions, 128572 flow [2023-01-27 21:19:51,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-01-27 21:19:51,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2023-01-27 21:19:51,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 17177 transitions. [2023-01-27 21:19:51,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3117422867513612 [2023-01-27 21:19:51,546 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 17177 transitions. [2023-01-27 21:19:51,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 17177 transitions. [2023-01-27 21:19:51,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:19:51,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 17177 transitions. [2023-01-27 21:19:51,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 148.07758620689654) internal successors, (17177), 116 states have internal predecessors, (17177), 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) [2023-01-27 21:19:51,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 475.0) internal successors, (55575), 117 states have internal predecessors, (55575), 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) [2023-01-27 21:19:51,609 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 475.0) internal successors, (55575), 117 states have internal predecessors, (55575), 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) [2023-01-27 21:19:51,609 INFO L175 Difference]: Start difference. First operand has 322 places, 2144 transitions, 35960 flow. Second operand 116 states and 17177 transitions. [2023-01-27 21:19:51,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 6850 transitions, 128572 flow [2023-01-27 21:22:18,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 6850 transitions, 125768 flow, removed 1399 selfloop flow, removed 3 redundant places. [2023-01-27 21:22:18,531 INFO L231 Difference]: Finished difference. Result has 528 places, 5418 transitions, 109588 flow [2023-01-27 21:22:18,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=34634, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1647, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=109588, PETRI_PLACES=528, PETRI_TRANSITIONS=5418} [2023-01-27 21:22:18,533 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 492 predicate places. [2023-01-27 21:22:18,533 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 5418 transitions, 109588 flow [2023-01-27 21:22:18,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 141.2258064516129) internal successors, (4378), 31 states have internal predecessors, (4378), 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) [2023-01-27 21:22:18,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:22:18,534 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, 1, 1, 1, 1, 1] [2023-01-27 21:22:18,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-27 21:22:18,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-27 21:22:18,740 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)] === [2023-01-27 21:22:18,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:22:18,740 INFO L85 PathProgramCache]: Analyzing trace with hash 2083007621, now seen corresponding path program 5 times [2023-01-27 21:22:18,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:22:18,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372870596] [2023-01-27 21:22:18,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:22:18,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:22:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:22:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:22:19,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:22:19,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372870596] [2023-01-27 21:22:19,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372870596] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:22:19,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980745927] [2023-01-27 21:22:19,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:22:19,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:22:19,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:22:19,150 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) [2023-01-27 21:22:19,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-27 21:22:19,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:22:19,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:22:19,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 21:22:19,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:22:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:22:19,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 21:22:19,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980745927] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:22:19,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 21:22:19,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 23 [2023-01-27 21:22:19,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917079919] [2023-01-27 21:22:19,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:22:19,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 21:22:19,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:22:19,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 21:22:19,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-01-27 21:22:19,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 475 [2023-01-27 21:22:19,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 5418 transitions, 109588 flow. Second operand has 12 states, 12 states have (on average 162.33333333333334) internal successors, (1948), 12 states have internal predecessors, (1948), 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) [2023-01-27 21:22:19,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:22:19,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 475 [2023-01-27 21:22:19,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:24:12,864 INFO L130 PetriNetUnfolder]: 88654/121890 cut-off events. [2023-01-27 21:24:12,865 INFO L131 PetriNetUnfolder]: For 8977914/8977914 co-relation queries the response was YES. [2023-01-27 21:24:19,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1511576 conditions, 121890 events. 88654/121890 cut-off events. For 8977914/8977914 co-relation queries the response was YES. Maximal size of possible extension queue 4561. Compared 819463 event pairs, 19870 based on Foata normal form. 48/121938 useless extension candidates. Maximal degree in co-relation 1510193. Up to 68100 conditions per place. [2023-01-27 21:24:20,467 INFO L137 encePairwiseOnDemand]: 462/475 looper letters, 4682 selfloop transitions, 1315 changer transitions 2/5999 dead transitions. [2023-01-27 21:24:20,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 5999 transitions, 133102 flow [2023-01-27 21:24:20,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 21:24:20,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 21:24:20,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2045 transitions. [2023-01-27 21:24:20,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3587719298245614 [2023-01-27 21:24:20,470 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2045 transitions. [2023-01-27 21:24:20,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2045 transitions. [2023-01-27 21:24:20,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:24:20,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2045 transitions. [2023-01-27 21:24:20,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 170.41666666666666) internal successors, (2045), 12 states have internal predecessors, (2045), 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) [2023-01-27 21:24:20,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 475.0) internal successors, (6175), 13 states have internal predecessors, (6175), 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) [2023-01-27 21:24:20,474 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 475.0) internal successors, (6175), 13 states have internal predecessors, (6175), 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) [2023-01-27 21:24:20,474 INFO L175 Difference]: Start difference. First operand has 528 places, 5418 transitions, 109588 flow. Second operand 12 states and 2045 transitions. [2023-01-27 21:24:20,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 5999 transitions, 133102 flow [2023-01-27 21:29:55,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 5999 transitions, 126423 flow, removed 3186 selfloop flow, removed 6 redundant places. [2023-01-27 21:29:55,567 INFO L231 Difference]: Finished difference. Result has 535 places, 5509 transitions, 108447 flow [2023-01-27 21:29:55,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=104091, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=108447, PETRI_PLACES=535, PETRI_TRANSITIONS=5509} [2023-01-27 21:29:55,572 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 499 predicate places. [2023-01-27 21:29:55,572 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 5509 transitions, 108447 flow [2023-01-27 21:29:55,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 162.33333333333334) internal successors, (1948), 12 states have internal predecessors, (1948), 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) [2023-01-27 21:29:55,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:29:55,572 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, 1, 1, 1, 1, 1] [2023-01-27 21:29:55,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-27 21:29:55,777 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,SelfDestructingSolverStorable16 [2023-01-27 21:29:55,777 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)] === [2023-01-27 21:29:55,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:29:55,777 INFO L85 PathProgramCache]: Analyzing trace with hash 333602691, now seen corresponding path program 6 times [2023-01-27 21:29:55,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:29:55,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234724861] [2023-01-27 21:29:55,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:29:55,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:29:55,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:29:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:29:56,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:29:56,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234724861] [2023-01-27 21:29:56,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234724861] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:29:56,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501145633] [2023-01-27 21:29:56,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:29:56,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:29:56,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:29:56,109 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) [2023-01-27 21:29:56,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-27 21:29:56,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 21:29:56,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:29:56,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 21:29:56,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:29:56,405 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 21:29:56,406 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 17 treesize of output 11 [2023-01-27 21:29:56,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:29:56,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:29:56,463 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:29:56,464 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 23 treesize of output 15 [2023-01-27 21:29:56,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:29:56,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501145633] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:29:56,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:29:56,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2023-01-27 21:29:56,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368560314] [2023-01-27 21:29:56,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:29:56,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 21:29:56,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:29:56,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 21:29:56,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2023-01-27 21:29:56,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 475 [2023-01-27 21:29:56,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 5509 transitions, 108447 flow. Second operand has 30 states, 30 states have (on average 141.36666666666667) internal successors, (4241), 30 states have internal predecessors, (4241), 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) [2023-01-27 21:29:56,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:29:56,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 475 [2023-01-27 21:29:56,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand