/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 10:14:56,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 10:14:56,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 10:14:56,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 10:14:56,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 10:14:56,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 10:14:56,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 10:14:56,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 10:14:56,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 10:14:56,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 10:14:56,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 10:14:56,339 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 10:14:56,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 10:14:56,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 10:14:56,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 10:14:56,342 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 10:14:56,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 10:14:56,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 10:14:56,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 10:14:56,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 10:14:56,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 10:14:56,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 10:14:56,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 10:14:56,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 10:14:56,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 10:14:56,352 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 10:14:56,352 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 10:14:56,353 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 10:14:56,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 10:14:56,354 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 10:14:56,354 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 10:14:56,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 10:14:56,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 10:14:56,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 10:14:56,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 10:14:56,356 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 10:14:56,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 10:14:56,357 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 10:14:56,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 10:14:56,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 10:14:56,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 10:14:56,359 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 10:14:56,373 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 10:14:56,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 10:14:56,374 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 10:14:56,374 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 10:14:56,374 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 10:14:56,374 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 10:14:56,374 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 10:14:56,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 10:14:56,375 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 10:14:56,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 10:14:56,375 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 10:14:56,375 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 10:14:56,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 10:14:56,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 10:14:56,376 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 10:14:56,376 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 10:14:56,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 10:14:56,376 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 10:14:56,376 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 10:14:56,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 10:14:56,377 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 10:14:56,377 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 10:14:56,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 10:14:56,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 10:14:56,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 10:14:56,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 10:14:56,378 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 10:14:56,378 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 10:14:56,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 10:14:56,378 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 10:14:56,378 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 10:14:56,379 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 10:14:56,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 10:14:56,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 10:14:56,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 10:14:56,532 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 10:14:56,532 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 10:14:56,533 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-01-28 10:14:57,617 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 10:14:57,759 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 10:14:57,759 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-01-28 10:14:57,763 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/846e97e9f/5bc1a3c1b7094bf59e7b5d61e0039c23/FLAG8ee59c558 [2023-01-28 10:14:57,772 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/846e97e9f/5bc1a3c1b7094bf59e7b5d61e0039c23 [2023-01-28 10:14:57,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 10:14:57,775 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 10:14:57,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 10:14:57,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 10:14:57,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 10:14:57,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 10:14:57" (1/1) ... [2023-01-28 10:14:57,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e0e75c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:14:57, skipping insertion in model container [2023-01-28 10:14:57,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 10:14:57" (1/1) ... [2023-01-28 10:14:57,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 10:14:57,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 10:14:57,915 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-three-array-sum-alt.wvr.c[2412,2425] [2023-01-28 10:14:57,931 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 10:14:57,939 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 10:14:57,961 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-three-array-sum-alt.wvr.c[2412,2425] [2023-01-28 10:14:57,969 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 10:14:57,978 INFO L208 MainTranslator]: Completed translation [2023-01-28 10:14:57,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:14:57 WrapperNode [2023-01-28 10:14:57,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 10:14:57,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 10:14:57,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 10:14:57,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 10:14:57,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:14:57" (1/1) ... [2023-01-28 10:14:58,001 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:14:57" (1/1) ... [2023-01-28 10:14:58,023 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 275 [2023-01-28 10:14:58,024 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 10:14:58,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 10:14:58,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 10:14:58,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 10:14:58,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:14:57" (1/1) ... [2023-01-28 10:14:58,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:14:57" (1/1) ... [2023-01-28 10:14:58,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:14:57" (1/1) ... [2023-01-28 10:14:58,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:14:57" (1/1) ... [2023-01-28 10:14:58,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:14:57" (1/1) ... [2023-01-28 10:14:58,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:14:57" (1/1) ... [2023-01-28 10:14:58,042 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:14:57" (1/1) ... [2023-01-28 10:14:58,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:14:57" (1/1) ... [2023-01-28 10:14:58,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 10:14:58,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 10:14:58,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 10:14:58,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 10:14:58,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:14:57" (1/1) ... [2023-01-28 10:14:58,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 10:14:58,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:14:58,070 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 10:14:58,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 10:14:58,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 10:14:58,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 10:14:58,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 10:14:58,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 10:14:58,093 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 10:14:58,093 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 10:14:58,094 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 10:14:58,094 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 10:14:58,094 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-28 10:14:58,094 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-28 10:14:58,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 10:14:58,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 10:14:58,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 10:14:58,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 10:14:58,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 10:14:58,095 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 10:14:58,179 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 10:14:58,181 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 10:14:58,574 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 10:14:58,581 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 10:14:58,581 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-01-28 10:14:58,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 10:14:58 BoogieIcfgContainer [2023-01-28 10:14:58,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 10:14:58,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 10:14:58,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 10:14:58,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 10:14:58,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 10:14:57" (1/3) ... [2023-01-28 10:14:58,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178cfa5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 10:14:58, skipping insertion in model container [2023-01-28 10:14:58,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:14:57" (2/3) ... [2023-01-28 10:14:58,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178cfa5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 10:14:58, skipping insertion in model container [2023-01-28 10:14:58,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 10:14:58" (3/3) ... [2023-01-28 10:14:58,588 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2023-01-28 10:14:58,599 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 10:14:58,599 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 10:14:58,599 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 10:14:58,682 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 10:14:58,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 302 places, 321 transitions, 666 flow [2023-01-28 10:14:58,790 INFO L130 PetriNetUnfolder]: 29/318 cut-off events. [2023-01-28 10:14:58,791 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 10:14:58,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 318 events. 29/318 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 438 event pairs, 0 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 213. Up to 2 conditions per place. [2023-01-28 10:14:58,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 302 places, 321 transitions, 666 flow [2023-01-28 10:14:58,800 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 289 places, 308 transitions, 634 flow [2023-01-28 10:14:58,802 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 10:14:58,807 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 289 places, 308 transitions, 634 flow [2023-01-28 10:14:58,809 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 289 places, 308 transitions, 634 flow [2023-01-28 10:14:58,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 289 places, 308 transitions, 634 flow [2023-01-28 10:14:58,845 INFO L130 PetriNetUnfolder]: 29/308 cut-off events. [2023-01-28 10:14:58,845 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 10:14:58,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 308 events. 29/308 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 431 event pairs, 0 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 213. Up to 2 conditions per place. [2023-01-28 10:14:58,851 INFO L119 LiptonReduction]: Number of co-enabled transitions 12810 [2023-01-28 10:15:05,088 INFO L134 LiptonReduction]: Checked pairs total: 12315 [2023-01-28 10:15:05,089 INFO L136 LiptonReduction]: Total number of compositions: 361 [2023-01-28 10:15:05,098 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 10:15:05,109 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;@94a4b70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 10:15:05,109 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 10:15:05,139 INFO L130 PetriNetUnfolder]: 6/27 cut-off events. [2023-01-28 10:15:05,139 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 10:15:05,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:05,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:15:05,141 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:15:05,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:05,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1610439478, now seen corresponding path program 1 times [2023-01-28 10:15:05,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:05,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632887496] [2023-01-28 10:15:05,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:05,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:15:06,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:06,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632887496] [2023-01-28 10:15:06,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632887496] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:15:06,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:15:06,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 10:15:06,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365847997] [2023-01-28 10:15:06,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:15:06,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 10:15:06,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:06,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 10:15:06,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 10:15:06,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 682 [2023-01-28 10:15:06,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 240.75) internal successors, (963), 4 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:06,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:06,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 682 [2023-01-28 10:15:06,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:06,229 INFO L130 PetriNetUnfolder]: 445/647 cut-off events. [2023-01-28 10:15:06,229 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2023-01-28 10:15:06,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1360 conditions, 647 events. 445/647 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2249 event pairs, 76 based on Foata normal form. 2/399 useless extension candidates. Maximal degree in co-relation 803. Up to 465 conditions per place. [2023-01-28 10:15:06,235 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 50 selfloop transitions, 12 changer transitions 2/67 dead transitions. [2023-01-28 10:15:06,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 67 transitions, 313 flow [2023-01-28 10:15:06,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 10:15:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 10:15:06,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1010 transitions. [2023-01-28 10:15:06,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37023460410557185 [2023-01-28 10:15:06,255 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1010 transitions. [2023-01-28 10:15:06,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1010 transitions. [2023-01-28 10:15:06,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:06,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1010 transitions. [2023-01-28 10:15:06,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 252.5) internal successors, (1010), 4 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:06,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 682.0) internal successors, (3410), 5 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:06,272 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 682.0) internal successors, (3410), 5 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:06,273 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 4 states and 1010 transitions. [2023-01-28 10:15:06,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 67 transitions, 313 flow [2023-01-28 10:15:06,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 67 transitions, 279 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-28 10:15:06,279 INFO L231 Difference]: Finished difference. Result has 31 places, 39 transitions, 145 flow [2023-01-28 10:15:06,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=31, PETRI_TRANSITIONS=39} [2023-01-28 10:15:06,283 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2023-01-28 10:15:06,284 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 39 transitions, 145 flow [2023-01-28 10:15:06,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 240.75) internal successors, (963), 4 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:06,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:06,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:15:06,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 10:15:06,285 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:15:06,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:06,288 INFO L85 PathProgramCache]: Analyzing trace with hash -713284412, now seen corresponding path program 1 times [2023-01-28 10:15:06,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:06,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143104285] [2023-01-28 10:15:06,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:06,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:15:06,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:06,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143104285] [2023-01-28 10:15:06,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143104285] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:15:06,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:15:06,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 10:15:06,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375151967] [2023-01-28 10:15:06,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:15:06,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 10:15:06,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:06,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 10:15:06,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 10:15:06,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 682 [2023-01-28 10:15:06,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 39 transitions, 145 flow. Second operand has 5 states, 5 states have (on average 247.2) internal successors, (1236), 5 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:06,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:06,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 682 [2023-01-28 10:15:06,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:06,610 INFO L130 PetriNetUnfolder]: 719/1094 cut-off events. [2023-01-28 10:15:06,610 INFO L131 PetriNetUnfolder]: For 314/314 co-relation queries the response was YES. [2023-01-28 10:15:06,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2709 conditions, 1094 events. 719/1094 cut-off events. For 314/314 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4526 event pairs, 299 based on Foata normal form. 48/1130 useless extension candidates. Maximal degree in co-relation 1204. Up to 480 conditions per place. [2023-01-28 10:15:06,616 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 67 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2023-01-28 10:15:06,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 79 transitions, 432 flow [2023-01-28 10:15:06,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:15:06,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:15:06,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1279 transitions. [2023-01-28 10:15:06,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3750733137829912 [2023-01-28 10:15:06,619 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1279 transitions. [2023-01-28 10:15:06,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1279 transitions. [2023-01-28 10:15:06,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:06,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1279 transitions. [2023-01-28 10:15:06,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 255.8) internal successors, (1279), 5 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:06,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:06,626 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:06,626 INFO L175 Difference]: Start difference. First operand has 31 places, 39 transitions, 145 flow. Second operand 5 states and 1279 transitions. [2023-01-28 10:15:06,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 79 transitions, 432 flow [2023-01-28 10:15:06,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 79 transitions, 432 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 10:15:06,629 INFO L231 Difference]: Finished difference. Result has 39 places, 44 transitions, 222 flow [2023-01-28 10:15:06,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=222, PETRI_PLACES=39, PETRI_TRANSITIONS=44} [2023-01-28 10:15:06,630 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2023-01-28 10:15:06,630 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 44 transitions, 222 flow [2023-01-28 10:15:06,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 247.2) internal successors, (1236), 5 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:06,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:06,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:15:06,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 10:15:06,631 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:15:06,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:06,634 INFO L85 PathProgramCache]: Analyzing trace with hash -774282216, now seen corresponding path program 1 times [2023-01-28 10:15:06,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:06,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640269447] [2023-01-28 10:15:06,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:06,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:15:06,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:06,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640269447] [2023-01-28 10:15:06,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640269447] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:15:06,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:15:06,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 10:15:06,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632386190] [2023-01-28 10:15:06,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:15:06,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 10:15:06,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:06,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 10:15:06,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 10:15:06,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 682 [2023-01-28 10:15:06,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 44 transitions, 222 flow. Second operand has 5 states, 5 states have (on average 247.2) internal successors, (1236), 5 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:06,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:06,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 682 [2023-01-28 10:15:06,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:06,882 INFO L130 PetriNetUnfolder]: 569/906 cut-off events. [2023-01-28 10:15:06,882 INFO L131 PetriNetUnfolder]: For 354/384 co-relation queries the response was YES. [2023-01-28 10:15:06,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2279 conditions, 906 events. 569/906 cut-off events. For 354/384 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3922 event pairs, 244 based on Foata normal form. 74/970 useless extension candidates. Maximal degree in co-relation 1290. Up to 490 conditions per place. [2023-01-28 10:15:06,887 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 61 selfloop transitions, 10 changer transitions 0/74 dead transitions. [2023-01-28 10:15:06,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 74 transitions, 452 flow [2023-01-28 10:15:06,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:15:06,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:15:06,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1277 transitions. [2023-01-28 10:15:06,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3744868035190616 [2023-01-28 10:15:06,889 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1277 transitions. [2023-01-28 10:15:06,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1277 transitions. [2023-01-28 10:15:06,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:06,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1277 transitions. [2023-01-28 10:15:06,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 255.4) internal successors, (1277), 5 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:06,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:06,896 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:06,897 INFO L175 Difference]: Start difference. First operand has 39 places, 44 transitions, 222 flow. Second operand 5 states and 1277 transitions. [2023-01-28 10:15:06,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 74 transitions, 452 flow [2023-01-28 10:15:06,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 74 transitions, 448 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-01-28 10:15:06,902 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 246 flow [2023-01-28 10:15:06,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=246, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2023-01-28 10:15:06,903 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 13 predicate places. [2023-01-28 10:15:06,905 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 246 flow [2023-01-28 10:15:06,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 247.2) internal successors, (1236), 5 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:06,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:06,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:15:06,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 10:15:06,906 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:15:06,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:06,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1829236200, now seen corresponding path program 1 times [2023-01-28 10:15:06,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:06,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539631210] [2023-01-28 10:15:06,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:06,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:15:07,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:07,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539631210] [2023-01-28 10:15:07,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539631210] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:15:07,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:15:07,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 10:15:07,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776849095] [2023-01-28 10:15:07,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:15:07,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 10:15:07,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:07,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 10:15:07,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 10:15:07,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 682 [2023-01-28 10:15:07,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 246 flow. Second operand has 5 states, 5 states have (on average 244.2) internal successors, (1221), 5 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:07,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:07,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 682 [2023-01-28 10:15:07,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:07,140 INFO L130 PetriNetUnfolder]: 481/766 cut-off events. [2023-01-28 10:15:07,140 INFO L131 PetriNetUnfolder]: For 435/471 co-relation queries the response was YES. [2023-01-28 10:15:07,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2012 conditions, 766 events. 481/766 cut-off events. For 435/471 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3254 event pairs, 218 based on Foata normal form. 64/828 useless extension candidates. Maximal degree in co-relation 1427. Up to 518 conditions per place. [2023-01-28 10:15:07,143 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 26 selfloop transitions, 6 changer transitions 34/68 dead transitions. [2023-01-28 10:15:07,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 68 transitions, 433 flow [2023-01-28 10:15:07,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:15:07,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:15:07,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1259 transitions. [2023-01-28 10:15:07,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.369208211143695 [2023-01-28 10:15:07,146 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1259 transitions. [2023-01-28 10:15:07,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1259 transitions. [2023-01-28 10:15:07,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:07,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1259 transitions. [2023-01-28 10:15:07,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 251.8) internal successors, (1259), 5 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:07,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:07,157 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:07,157 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 246 flow. Second operand 5 states and 1259 transitions. [2023-01-28 10:15:07,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 68 transitions, 433 flow [2023-01-28 10:15:07,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 68 transitions, 414 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-01-28 10:15:07,160 INFO L231 Difference]: Finished difference. Result has 49 places, 34 transitions, 172 flow [2023-01-28 10:15:07,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=49, PETRI_TRANSITIONS=34} [2023-01-28 10:15:07,161 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2023-01-28 10:15:07,161 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 34 transitions, 172 flow [2023-01-28 10:15:07,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 244.2) internal successors, (1221), 5 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:07,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:07,162 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] [2023-01-28 10:15:07,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 10:15:07,163 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:15:07,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:07,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1395831978, now seen corresponding path program 1 times [2023-01-28 10:15:07,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:07,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035350060] [2023-01-28 10:15:07,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:07,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:07,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:07,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035350060] [2023-01-28 10:15:07,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035350060] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:15:07,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980655904] [2023-01-28 10:15:07,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:07,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:07,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:15:07,252 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:15:07,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 10:15:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:07,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:15:07,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:15:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:07,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:15:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:07,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980655904] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 10:15:07,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 10:15:07,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-01-28 10:15:07,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954705449] [2023-01-28 10:15:07,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:15:07,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 10:15:07,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:07,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 10:15:07,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-01-28 10:15:07,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 682 [2023-01-28 10:15:07,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 34 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 247.8) internal successors, (1239), 5 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:07,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:07,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 682 [2023-01-28 10:15:07,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:07,558 INFO L130 PetriNetUnfolder]: 378/548 cut-off events. [2023-01-28 10:15:07,558 INFO L131 PetriNetUnfolder]: For 253/253 co-relation queries the response was YES. [2023-01-28 10:15:07,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1497 conditions, 548 events. 378/548 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1841 event pairs, 96 based on Foata normal form. 42/576 useless extension candidates. Maximal degree in co-relation 1436. Up to 393 conditions per place. [2023-01-28 10:15:07,560 INFO L137 encePairwiseOnDemand]: 677/682 looper letters, 39 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2023-01-28 10:15:07,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 302 flow [2023-01-28 10:15:07,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:15:07,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:15:07,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1253 transitions. [2023-01-28 10:15:07,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36744868035190614 [2023-01-28 10:15:07,563 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1253 transitions. [2023-01-28 10:15:07,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1253 transitions. [2023-01-28 10:15:07,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:07,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1253 transitions. [2023-01-28 10:15:07,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 250.6) internal successors, (1253), 5 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:07,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:07,569 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:07,569 INFO L175 Difference]: Start difference. First operand has 49 places, 34 transitions, 172 flow. Second operand 5 states and 1253 transitions. [2023-01-28 10:15:07,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 302 flow [2023-01-28 10:15:07,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 242 flow, removed 10 selfloop flow, removed 12 redundant places. [2023-01-28 10:15:07,570 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 139 flow [2023-01-28 10:15:07,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=139, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2023-01-28 10:15:07,571 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-01-28 10:15:07,571 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 139 flow [2023-01-28 10:15:07,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 247.8) internal successors, (1239), 5 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:07,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:07,571 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] [2023-01-28 10:15:07,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-28 10:15:07,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:07,777 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:15:07,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:07,777 INFO L85 PathProgramCache]: Analyzing trace with hash -2005609756, now seen corresponding path program 1 times [2023-01-28 10:15:07,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:07,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841532217] [2023-01-28 10:15:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:07,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:07,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:07,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:07,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841532217] [2023-01-28 10:15:07,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841532217] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:15:07,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582837663] [2023-01-28 10:15:07,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:07,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:07,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:15:07,867 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:15:07,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 10:15:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:07,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:15:07,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:15:08,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:08,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:15:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:08,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582837663] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 10:15:08,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 10:15:08,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-01-28 10:15:08,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719479949] [2023-01-28 10:15:08,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:15:08,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 10:15:08,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:08,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 10:15:08,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-01-28 10:15:08,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 682 [2023-01-28 10:15:08,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 139 flow. Second operand has 5 states, 5 states have (on average 247.8) internal successors, (1239), 5 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:08,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:08,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 682 [2023-01-28 10:15:08,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:08,118 INFO L130 PetriNetUnfolder]: 297/441 cut-off events. [2023-01-28 10:15:08,119 INFO L131 PetriNetUnfolder]: For 322/384 co-relation queries the response was YES. [2023-01-28 10:15:08,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1254 conditions, 441 events. 297/441 cut-off events. For 322/384 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1418 event pairs, 107 based on Foata normal form. 90/512 useless extension candidates. Maximal degree in co-relation 1212. Up to 337 conditions per place. [2023-01-28 10:15:08,121 INFO L137 encePairwiseOnDemand]: 677/682 looper letters, 41 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2023-01-28 10:15:08,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 48 transitions, 281 flow [2023-01-28 10:15:08,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:15:08,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:15:08,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1253 transitions. [2023-01-28 10:15:08,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36744868035190614 [2023-01-28 10:15:08,123 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1253 transitions. [2023-01-28 10:15:08,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1253 transitions. [2023-01-28 10:15:08,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:08,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1253 transitions. [2023-01-28 10:15:08,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 250.6) internal successors, (1253), 5 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:08,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:08,129 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:08,129 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 139 flow. Second operand 5 states and 1253 transitions. [2023-01-28 10:15:08,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 48 transitions, 281 flow [2023-01-28 10:15:08,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 48 transitions, 264 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-01-28 10:15:08,130 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 149 flow [2023-01-28 10:15:08,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-01-28 10:15:08,131 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2023-01-28 10:15:08,131 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 149 flow [2023-01-28 10:15:08,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 247.8) internal successors, (1239), 5 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:08,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:08,132 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] [2023-01-28 10:15:08,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-28 10:15:08,336 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 [2023-01-28 10:15:08,337 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:15:08,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:08,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1026556102, now seen corresponding path program 1 times [2023-01-28 10:15:08,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:08,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676586132] [2023-01-28 10:15:08,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:08,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:08,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:08,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676586132] [2023-01-28 10:15:08,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676586132] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:15:08,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607014194] [2023-01-28 10:15:08,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:08,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:08,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:15:08,424 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:15:08,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 10:15:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:08,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:15:08,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:15:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:08,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:15:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:08,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607014194] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 10:15:08,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 10:15:08,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-01-28 10:15:08,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288369144] [2023-01-28 10:15:08,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:15:08,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 10:15:08,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:08,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 10:15:08,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-01-28 10:15:08,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 682 [2023-01-28 10:15:08,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:08,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:08,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 682 [2023-01-28 10:15:08,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:08,689 INFO L130 PetriNetUnfolder]: 282/422 cut-off events. [2023-01-28 10:15:08,689 INFO L131 PetriNetUnfolder]: For 431/551 co-relation queries the response was YES. [2023-01-28 10:15:08,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1279 conditions, 422 events. 282/422 cut-off events. For 431/551 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1260 event pairs, 114 based on Foata normal form. 146/567 useless extension candidates. Maximal degree in co-relation 1236. Up to 333 conditions per place. [2023-01-28 10:15:08,691 INFO L137 encePairwiseOnDemand]: 677/682 looper letters, 43 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-01-28 10:15:08,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 303 flow [2023-01-28 10:15:08,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:15:08,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:15:08,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1238 transitions. [2023-01-28 10:15:08,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.363049853372434 [2023-01-28 10:15:08,694 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1238 transitions. [2023-01-28 10:15:08,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1238 transitions. [2023-01-28 10:15:08,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:08,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1238 transitions. [2023-01-28 10:15:08,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 247.6) internal successors, (1238), 5 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:08,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:08,699 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:08,700 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 149 flow. Second operand 5 states and 1238 transitions. [2023-01-28 10:15:08,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 303 flow [2023-01-28 10:15:08,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 286 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-01-28 10:15:08,701 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 159 flow [2023-01-28 10:15:08,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-01-28 10:15:08,701 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 9 predicate places. [2023-01-28 10:15:08,701 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 159 flow [2023-01-28 10:15:08,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:08,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:08,702 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] [2023-01-28 10:15:08,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 10:15:08,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:08,907 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:15:08,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:08,907 INFO L85 PathProgramCache]: Analyzing trace with hash 334891270, now seen corresponding path program 1 times [2023-01-28 10:15:08,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:08,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246246426] [2023-01-28 10:15:08,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:08,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:09,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:09,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246246426] [2023-01-28 10:15:09,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246246426] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:15:09,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149762935] [2023-01-28 10:15:09,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:09,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:09,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:15:09,829 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:15:09,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 10:15:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:09,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 87 conjunts are in the unsatisfiable core [2023-01-28 10:15:09,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:15:09,960 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 34 treesize of output 32 [2023-01-28 10:15:10,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-01-28 10:15:10,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:15:10,339 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 10:15:10,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2023-01-28 10:15:10,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:10,429 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 28 treesize of output 20 [2023-01-28 10:15:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:10,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:15:10,545 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_347 (Array Int Int))) (<= .cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse1 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse1 c_~A~0.base) c_~A~0.offset))))) (forall ((v_ArrVal_347 (Array Int Int))) (<= (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset))) .cse0)))) is different from false [2023-01-28 10:15:10,561 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~asum~0 c_~bsum~0 (select (select |c_#memory_int| c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~B~0.offset))))) (and (forall ((v_ArrVal_347 (Array Int Int))) (<= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse0 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset))) .cse1)) (forall ((v_ArrVal_347 (Array Int Int))) (<= .cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset))))))) is different from false [2023-01-28 10:15:10,570 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0 (select (select |c_#memory_int| c_~B~0.base) c_~B~0.offset)))) (and (forall ((v_ArrVal_347 (Array Int Int))) (<= .cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse1 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse1 c_~A~0.base) c_~A~0.offset))))) (forall ((v_ArrVal_347 (Array Int Int))) (<= (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset))) .cse0)))) is different from false [2023-01-28 10:15:10,587 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_347 (Array Int Int)) (v_ArrVal_346 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_346))) (<= (+ c_~asum~0 c_~bsum~0 (select (select .cse0 c_~B~0.base) c_~B~0.offset)) (let ((.cse1 (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse1 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse1 c_~A~0.base) c_~A~0.offset)))))) (forall ((v_ArrVal_347 (Array Int Int)) (v_ArrVal_346 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_346))) (<= (let ((.cse2 (store .cse3 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset))) (+ c_~asum~0 c_~bsum~0 (select (select .cse3 c_~B~0.base) c_~B~0.offset)))))) is different from false [2023-01-28 10:15:10,613 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:10,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2166 treesize of output 1496 [2023-01-28 10:15:10,666 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:10,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 342 treesize of output 318 [2023-01-28 10:15:10,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:10,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 310 treesize of output 302 [2023-01-28 10:15:11,008 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:15:11,009 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:15:11,009 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:15:11,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 68 treesize of output 60 [2023-01-28 10:15:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-01-28 10:15:11,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149762935] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:15:11,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:15:11,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2023-01-28 10:15:11,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338014578] [2023-01-28 10:15:11,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:15:11,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 10:15:11,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:11,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 10:15:11,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=609, Unknown=4, NotChecked=212, Total=930 [2023-01-28 10:15:11,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 682 [2023-01-28 10:15:11,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 159 flow. Second operand has 31 states, 31 states have (on average 225.19354838709677) internal successors, (6981), 31 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:11,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:11,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 682 [2023-01-28 10:15:11,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:18,530 INFO L130 PetriNetUnfolder]: 824/1201 cut-off events. [2023-01-28 10:15:18,530 INFO L131 PetriNetUnfolder]: For 1036/1036 co-relation queries the response was YES. [2023-01-28 10:15:18,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3837 conditions, 1201 events. 824/1201 cut-off events. For 1036/1036 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4330 event pairs, 31 based on Foata normal form. 1/1202 useless extension candidates. Maximal degree in co-relation 3793. Up to 783 conditions per place. [2023-01-28 10:15:18,536 INFO L137 encePairwiseOnDemand]: 665/682 looper letters, 86 selfloop transitions, 46 changer transitions 1/133 dead transitions. [2023-01-28 10:15:18,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 133 transitions, 782 flow [2023-01-28 10:15:18,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 10:15:18,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 10:15:18,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3027 transitions. [2023-01-28 10:15:18,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34141664786826076 [2023-01-28 10:15:18,543 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3027 transitions. [2023-01-28 10:15:18,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3027 transitions. [2023-01-28 10:15:18,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:18,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3027 transitions. [2023-01-28 10:15:18,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 232.84615384615384) internal successors, (3027), 13 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:18,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:18,566 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:18,566 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 159 flow. Second operand 13 states and 3027 transitions. [2023-01-28 10:15:18,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 133 transitions, 782 flow [2023-01-28 10:15:18,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 133 transitions, 743 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-01-28 10:15:18,571 INFO L231 Difference]: Finished difference. Result has 56 places, 77 transitions, 501 flow [2023-01-28 10:15:18,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=501, PETRI_PLACES=56, PETRI_TRANSITIONS=77} [2023-01-28 10:15:18,573 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 24 predicate places. [2023-01-28 10:15:18,573 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 77 transitions, 501 flow [2023-01-28 10:15:18,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 225.19354838709677) internal successors, (6981), 31 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:18,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:18,575 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] [2023-01-28 10:15:18,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-01-28 10:15:18,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:18,780 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:15:18,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:18,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1866592914, now seen corresponding path program 2 times [2023-01-28 10:15:18,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:18,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198576031] [2023-01-28 10:15:18,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:18,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:19,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:19,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198576031] [2023-01-28 10:15:19,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198576031] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:15:19,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980778614] [2023-01-28 10:15:19,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:15:19,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:19,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:15:19,585 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:15:19,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 10:15:19,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:15:19,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:15:19,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 10:15:19,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:15:19,942 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:19,942 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 35 treesize of output 23 [2023-01-28 10:15:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:19,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:15:20,074 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:20,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 95 [2023-01-28 10:15:20,286 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-01-28 10:15:20,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 38 [2023-01-28 10:15:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:20,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980778614] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:15:20,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:15:20,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 14 [2023-01-28 10:15:20,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760172223] [2023-01-28 10:15:20,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:15:20,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 10:15:20,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:20,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 10:15:20,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-01-28 10:15:20,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 682 [2023-01-28 10:15:20,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 77 transitions, 501 flow. Second operand has 16 states, 16 states have (on average 238.1875) internal successors, (3811), 16 states have internal predecessors, (3811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:20,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:20,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 682 [2023-01-28 10:15:20,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:20,871 INFO L130 PetriNetUnfolder]: 943/1375 cut-off events. [2023-01-28 10:15:20,871 INFO L131 PetriNetUnfolder]: For 2919/2919 co-relation queries the response was YES. [2023-01-28 10:15:20,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6065 conditions, 1375 events. 943/1375 cut-off events. For 2919/2919 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5003 event pairs, 183 based on Foata normal form. 1/1376 useless extension candidates. Maximal degree in co-relation 6014. Up to 1203 conditions per place. [2023-01-28 10:15:20,878 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 102 selfloop transitions, 29 changer transitions 1/132 dead transitions. [2023-01-28 10:15:20,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 132 transitions, 1105 flow [2023-01-28 10:15:20,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 10:15:20,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 10:15:20,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2200 transitions. [2023-01-28 10:15:20,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35842293906810035 [2023-01-28 10:15:20,883 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2200 transitions. [2023-01-28 10:15:20,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2200 transitions. [2023-01-28 10:15:20,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:20,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2200 transitions. [2023-01-28 10:15:20,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 244.44444444444446) internal successors, (2200), 9 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:20,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:20,891 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:20,891 INFO L175 Difference]: Start difference. First operand has 56 places, 77 transitions, 501 flow. Second operand 9 states and 2200 transitions. [2023-01-28 10:15:20,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 132 transitions, 1105 flow [2023-01-28 10:15:20,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 132 transitions, 1043 flow, removed 29 selfloop flow, removed 2 redundant places. [2023-01-28 10:15:20,897 INFO L231 Difference]: Finished difference. Result has 68 places, 100 transitions, 714 flow [2023-01-28 10:15:20,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=714, PETRI_PLACES=68, PETRI_TRANSITIONS=100} [2023-01-28 10:15:20,897 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 36 predicate places. [2023-01-28 10:15:20,897 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 100 transitions, 714 flow [2023-01-28 10:15:20,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 238.1875) internal successors, (3811), 16 states have internal predecessors, (3811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:20,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:20,898 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] [2023-01-28 10:15:20,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 10:15:21,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:21,103 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:15:21,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:21,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1986908042, now seen corresponding path program 3 times [2023-01-28 10:15:21,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:21,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287798370] [2023-01-28 10:15:21,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:21,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:21,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:21,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287798370] [2023-01-28 10:15:21,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287798370] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:15:21,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37860143] [2023-01-28 10:15:21,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:15:21,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:21,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:15:21,741 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:15:21,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 10:15:21,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:15:21,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:15:21,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 10:15:21,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:15:22,090 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:22,090 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 35 treesize of output 23 [2023-01-28 10:15:22,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:22,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:15:22,239 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:22,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 87 [2023-01-28 10:15:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:22,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37860143] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:15:22,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:15:22,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 14 [2023-01-28 10:15:22,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373405942] [2023-01-28 10:15:22,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:15:22,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 10:15:22,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:22,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 10:15:22,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-01-28 10:15:22,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 682 [2023-01-28 10:15:22,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 100 transitions, 714 flow. Second operand has 16 states, 16 states have (on average 238.0) internal successors, (3808), 16 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:22,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:22,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 682 [2023-01-28 10:15:22,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:23,028 INFO L130 PetriNetUnfolder]: 1110/1617 cut-off events. [2023-01-28 10:15:23,028 INFO L131 PetriNetUnfolder]: For 4405/4405 co-relation queries the response was YES. [2023-01-28 10:15:23,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7424 conditions, 1617 events. 1110/1617 cut-off events. For 4405/4405 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 6070 event pairs, 227 based on Foata normal form. 1/1610 useless extension candidates. Maximal degree in co-relation 7367. Up to 1396 conditions per place. [2023-01-28 10:15:23,038 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 126 selfloop transitions, 45 changer transitions 1/172 dead transitions. [2023-01-28 10:15:23,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 172 transitions, 1518 flow [2023-01-28 10:15:23,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 10:15:23,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 10:15:23,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2206 transitions. [2023-01-28 10:15:23,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3594004561746497 [2023-01-28 10:15:23,043 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2206 transitions. [2023-01-28 10:15:23,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2206 transitions. [2023-01-28 10:15:23,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:23,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2206 transitions. [2023-01-28 10:15:23,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 245.11111111111111) internal successors, (2206), 9 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:23,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:23,051 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:23,051 INFO L175 Difference]: Start difference. First operand has 68 places, 100 transitions, 714 flow. Second operand 9 states and 2206 transitions. [2023-01-28 10:15:23,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 172 transitions, 1518 flow [2023-01-28 10:15:23,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 172 transitions, 1484 flow, removed 17 selfloop flow, removed 0 redundant places. [2023-01-28 10:15:23,065 INFO L231 Difference]: Finished difference. Result has 81 places, 126 transitions, 1056 flow [2023-01-28 10:15:23,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1056, PETRI_PLACES=81, PETRI_TRANSITIONS=126} [2023-01-28 10:15:23,066 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 49 predicate places. [2023-01-28 10:15:23,066 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 126 transitions, 1056 flow [2023-01-28 10:15:23,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 238.0) internal successors, (3808), 16 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:23,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:23,067 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] [2023-01-28 10:15:23,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-01-28 10:15:23,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:23,274 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:15:23,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:23,274 INFO L85 PathProgramCache]: Analyzing trace with hash 291437452, now seen corresponding path program 4 times [2023-01-28 10:15:23,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:23,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734293314] [2023-01-28 10:15:23,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:23,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:23,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:23,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:23,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734293314] [2023-01-28 10:15:23,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734293314] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:15:23,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994801784] [2023-01-28 10:15:23,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:15:23,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:23,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:15:23,933 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:15:23,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 10:15:24,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:15:24,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:15:24,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 10:15:24,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:15:24,201 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:24,202 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 35 treesize of output 23 [2023-01-28 10:15:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:24,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:15:24,353 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:24,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 87 [2023-01-28 10:15:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:24,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994801784] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:15:24,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:15:24,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 14 [2023-01-28 10:15:24,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234834950] [2023-01-28 10:15:24,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:15:24,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 10:15:24,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:24,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 10:15:24,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-01-28 10:15:24,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 682 [2023-01-28 10:15:24,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 126 transitions, 1056 flow. Second operand has 16 states, 16 states have (on average 238.0) internal successors, (3808), 16 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:24,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:24,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 682 [2023-01-28 10:15:24,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:25,077 INFO L130 PetriNetUnfolder]: 1267/1845 cut-off events. [2023-01-28 10:15:25,078 INFO L131 PetriNetUnfolder]: For 6634/6634 co-relation queries the response was YES. [2023-01-28 10:15:25,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9122 conditions, 1845 events. 1267/1845 cut-off events. For 6634/6634 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7079 event pairs, 276 based on Foata normal form. 1/1846 useless extension candidates. Maximal degree in co-relation 9058. Up to 1618 conditions per place. [2023-01-28 10:15:25,092 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 137 selfloop transitions, 54 changer transitions 1/192 dead transitions. [2023-01-28 10:15:25,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 192 transitions, 1907 flow [2023-01-28 10:15:25,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 10:15:25,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 10:15:25,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2202 transitions. [2023-01-28 10:15:25,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3587487781036168 [2023-01-28 10:15:25,096 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2202 transitions. [2023-01-28 10:15:25,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2202 transitions. [2023-01-28 10:15:25,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:25,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2202 transitions. [2023-01-28 10:15:25,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 244.66666666666666) internal successors, (2202), 9 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:25,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:25,105 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:25,105 INFO L175 Difference]: Start difference. First operand has 81 places, 126 transitions, 1056 flow. Second operand 9 states and 2202 transitions. [2023-01-28 10:15:25,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 192 transitions, 1907 flow [2023-01-28 10:15:25,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 192 transitions, 1812 flow, removed 13 selfloop flow, removed 3 redundant places. [2023-01-28 10:15:25,121 INFO L231 Difference]: Finished difference. Result has 92 places, 151 transitions, 1411 flow [2023-01-28 10:15:25,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1411, PETRI_PLACES=92, PETRI_TRANSITIONS=151} [2023-01-28 10:15:25,121 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 60 predicate places. [2023-01-28 10:15:25,121 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 151 transitions, 1411 flow [2023-01-28 10:15:25,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 238.0) internal successors, (3808), 16 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:25,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:25,122 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] [2023-01-28 10:15:25,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 10:15:25,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:25,327 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:15:25,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:25,327 INFO L85 PathProgramCache]: Analyzing trace with hash 2090292154, now seen corresponding path program 5 times [2023-01-28 10:15:25,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:25,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530530551] [2023-01-28 10:15:25,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:25,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:26,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:26,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530530551] [2023-01-28 10:15:26,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530530551] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:15:26,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678949795] [2023-01-28 10:15:26,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:15:26,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:26,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:15:26,011 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:15:26,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 10:15:26,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:15:26,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:15:26,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 10:15:26,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:15:26,414 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:15:26,425 INFO L321 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2023-01-28 10:15:26,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2023-01-28 10:15:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:26,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:15:26,587 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:26,588 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 20 treesize of output 17 [2023-01-28 10:15:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:26,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678949795] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:15:26,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:15:26,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 17 [2023-01-28 10:15:26,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430275001] [2023-01-28 10:15:26,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:15:26,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 10:15:26,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:26,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 10:15:26,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-01-28 10:15:26,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 682 [2023-01-28 10:15:26,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 151 transitions, 1411 flow. Second operand has 19 states, 19 states have (on average 237.73684210526315) internal successors, (4517), 19 states have internal predecessors, (4517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:26,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:26,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 682 [2023-01-28 10:15:26,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:27,260 INFO L130 PetriNetUnfolder]: 1518/2211 cut-off events. [2023-01-28 10:15:27,260 INFO L131 PetriNetUnfolder]: For 9950/9950 co-relation queries the response was YES. [2023-01-28 10:15:27,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11640 conditions, 2211 events. 1518/2211 cut-off events. For 9950/9950 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9006 event pairs, 151 based on Foata normal form. 1/2212 useless extension candidates. Maximal degree in co-relation 11570. Up to 1831 conditions per place. [2023-01-28 10:15:27,282 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 155 selfloop transitions, 83 changer transitions 1/239 dead transitions. [2023-01-28 10:15:27,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 239 transitions, 2522 flow [2023-01-28 10:15:27,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 10:15:27,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 10:15:27,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2214 transitions. [2023-01-28 10:15:27,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2023-01-28 10:15:27,287 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2214 transitions. [2023-01-28 10:15:27,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2214 transitions. [2023-01-28 10:15:27,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:27,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2214 transitions. [2023-01-28 10:15:27,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:27,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:27,297 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:27,297 INFO L175 Difference]: Start difference. First operand has 92 places, 151 transitions, 1411 flow. Second operand 9 states and 2214 transitions. [2023-01-28 10:15:27,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 239 transitions, 2522 flow [2023-01-28 10:15:27,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 239 transitions, 2406 flow, removed 38 selfloop flow, removed 1 redundant places. [2023-01-28 10:15:27,328 INFO L231 Difference]: Finished difference. Result has 104 places, 184 transitions, 1908 flow [2023-01-28 10:15:27,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=1305, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1908, PETRI_PLACES=104, PETRI_TRANSITIONS=184} [2023-01-28 10:15:27,329 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 72 predicate places. [2023-01-28 10:15:27,329 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 184 transitions, 1908 flow [2023-01-28 10:15:27,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 237.73684210526315) internal successors, (4517), 19 states have internal predecessors, (4517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:27,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:27,330 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] [2023-01-28 10:15:27,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 10:15:27,537 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,SelfDestructingSolverStorable11 [2023-01-28 10:15:27,538 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:15:27,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:27,539 INFO L85 PathProgramCache]: Analyzing trace with hash -300642656, now seen corresponding path program 6 times [2023-01-28 10:15:27,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:27,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401433804] [2023-01-28 10:15:27,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:27,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:27,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:28,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:28,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401433804] [2023-01-28 10:15:28,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401433804] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:15:28,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337829022] [2023-01-28 10:15:28,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:15:28,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:28,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:15:28,246 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:15:28,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 10:15:28,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 10:15:28,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:15:28,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-01-28 10:15:28,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:15:28,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:15:28,434 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:15:28,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-01-28 10:15:28,669 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-01-28 10:15:28,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-01-28 10:15:28,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:28,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 106 [2023-01-28 10:15:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:28,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:15:29,627 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:29,627 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 52 treesize of output 40 [2023-01-28 10:15:29,658 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:15:29,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:29,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337829022] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:15:29,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:15:29,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 19 [2023-01-28 10:15:29,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136067635] [2023-01-28 10:15:29,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:15:29,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 10:15:29,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:29,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 10:15:29,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-01-28 10:15:29,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 682 [2023-01-28 10:15:29,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 184 transitions, 1908 flow. Second operand has 21 states, 21 states have (on average 223.47619047619048) internal successors, (4693), 21 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:29,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:29,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 682 [2023-01-28 10:15:29,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:30,625 INFO L130 PetriNetUnfolder]: 1606/2340 cut-off events. [2023-01-28 10:15:30,625 INFO L131 PetriNetUnfolder]: For 13192/13192 co-relation queries the response was YES. [2023-01-28 10:15:30,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13003 conditions, 2340 events. 1606/2340 cut-off events. For 13192/13192 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9646 event pairs, 170 based on Foata normal form. 1/2341 useless extension candidates. Maximal degree in co-relation 12927. Up to 1983 conditions per place. [2023-01-28 10:15:30,639 INFO L137 encePairwiseOnDemand]: 669/682 looper letters, 150 selfloop transitions, 87 changer transitions 1/238 dead transitions. [2023-01-28 10:15:30,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 238 transitions, 2768 flow [2023-01-28 10:15:30,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 10:15:30,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 10:15:30,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2530 transitions. [2023-01-28 10:15:30,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33724340175953077 [2023-01-28 10:15:30,644 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2530 transitions. [2023-01-28 10:15:30,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2530 transitions. [2023-01-28 10:15:30,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:30,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2530 transitions. [2023-01-28 10:15:30,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 230.0) internal successors, (2530), 11 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:30,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:30,653 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:30,653 INFO L175 Difference]: Start difference. First operand has 104 places, 184 transitions, 1908 flow. Second operand 11 states and 2530 transitions. [2023-01-28 10:15:30,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 238 transitions, 2768 flow [2023-01-28 10:15:30,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 238 transitions, 2614 flow, removed 61 selfloop flow, removed 2 redundant places. [2023-01-28 10:15:30,689 INFO L231 Difference]: Finished difference. Result has 116 places, 193 transitions, 2137 flow [2023-01-28 10:15:30,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=1762, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2137, PETRI_PLACES=116, PETRI_TRANSITIONS=193} [2023-01-28 10:15:30,689 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 84 predicate places. [2023-01-28 10:15:30,689 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 193 transitions, 2137 flow [2023-01-28 10:15:30,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 223.47619047619048) internal successors, (4693), 21 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:30,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:30,690 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] [2023-01-28 10:15:30,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 10:15:30,895 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,SelfDestructingSolverStorable12 [2023-01-28 10:15:30,895 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:15:30,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:30,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1927164992, now seen corresponding path program 7 times [2023-01-28 10:15:30,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:30,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33240784] [2023-01-28 10:15:30,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:30,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:31,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:31,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33240784] [2023-01-28 10:15:31,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33240784] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:15:31,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024577494] [2023-01-28 10:15:31,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:15:31,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:31,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:15:31,445 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:15:31,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 10:15:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:31,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 10:15:31,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:15:31,753 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:31,753 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 35 treesize of output 23 [2023-01-28 10:15:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:31,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:15:31,883 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:31,884 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 20 treesize of output 17 [2023-01-28 10:15:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:31,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024577494] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:15:31,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:15:31,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 14 [2023-01-28 10:15:31,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859268209] [2023-01-28 10:15:31,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:15:31,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 10:15:31,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:31,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 10:15:31,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-01-28 10:15:31,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 682 [2023-01-28 10:15:31,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 193 transitions, 2137 flow. Second operand has 16 states, 16 states have (on average 238.1875) internal successors, (3811), 16 states have internal predecessors, (3811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:31,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:31,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 682 [2023-01-28 10:15:31,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:32,621 INFO L130 PetriNetUnfolder]: 1696/2473 cut-off events. [2023-01-28 10:15:32,621 INFO L131 PetriNetUnfolder]: For 14905/14905 co-relation queries the response was YES. [2023-01-28 10:15:32,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14234 conditions, 2473 events. 1696/2473 cut-off events. For 14905/14905 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 10389 event pairs, 182 based on Foata normal form. 1/2474 useless extension candidates. Maximal degree in co-relation 14151. Up to 2112 conditions per place. [2023-01-28 10:15:32,639 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 161 selfloop transitions, 84 changer transitions 1/246 dead transitions. [2023-01-28 10:15:32,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 246 transitions, 2982 flow [2023-01-28 10:15:32,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 10:15:32,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 10:15:32,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2216 transitions. [2023-01-28 10:15:32,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.361029651352232 [2023-01-28 10:15:32,642 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2216 transitions. [2023-01-28 10:15:32,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2216 transitions. [2023-01-28 10:15:32,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:32,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2216 transitions. [2023-01-28 10:15:32,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 246.22222222222223) internal successors, (2216), 9 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:32,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:32,650 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:32,650 INFO L175 Difference]: Start difference. First operand has 116 places, 193 transitions, 2137 flow. Second operand 9 states and 2216 transitions. [2023-01-28 10:15:32,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 246 transitions, 2982 flow [2023-01-28 10:15:32,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 246 transitions, 2880 flow, removed 32 selfloop flow, removed 4 redundant places. [2023-01-28 10:15:32,690 INFO L231 Difference]: Finished difference. Result has 122 places, 199 transitions, 2316 flow [2023-01-28 10:15:32,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=2035, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2316, PETRI_PLACES=122, PETRI_TRANSITIONS=199} [2023-01-28 10:15:32,691 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 90 predicate places. [2023-01-28 10:15:32,691 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 199 transitions, 2316 flow [2023-01-28 10:15:32,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 238.1875) internal successors, (3811), 16 states have internal predecessors, (3811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:32,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:32,691 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] [2023-01-28 10:15:32,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 10:15:32,896 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,SelfDestructingSolverStorable13 [2023-01-28 10:15:32,896 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:15:32,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:32,897 INFO L85 PathProgramCache]: Analyzing trace with hash -881735812, now seen corresponding path program 8 times [2023-01-28 10:15:32,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:32,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124473533] [2023-01-28 10:15:32,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:32,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:32,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:15:33,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:33,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124473533] [2023-01-28 10:15:33,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124473533] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:15:33,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703286534] [2023-01-28 10:15:33,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:15:33,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:33,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:15:33,853 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:15:33,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 10:15:33,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:15:33,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:15:33,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-01-28 10:15:33,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:15:34,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:15:34,052 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:15:34,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-01-28 10:15:34,316 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:15:34,336 INFO L321 Elim1Store]: treesize reduction 67, result has 22.1 percent of original size [2023-01-28 10:15:34,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 41 [2023-01-28 10:15:34,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:34,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 130 [2023-01-28 10:15:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:34,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:15:36,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:36,057 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 52 treesize of output 40 [2023-01-28 10:15:36,075 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:15:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:36,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703286534] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:15:36,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:15:36,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 27 [2023-01-28 10:15:36,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836060448] [2023-01-28 10:15:36,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:15:36,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 10:15:36,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:36,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 10:15:36,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2023-01-28 10:15:36,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 682 [2023-01-28 10:15:36,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 199 transitions, 2316 flow. Second operand has 29 states, 29 states have (on average 203.31034482758622) internal successors, (5896), 29 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:36,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:36,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 682 [2023-01-28 10:15:36,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:37,356 INFO L130 PetriNetUnfolder]: 1840/2682 cut-off events. [2023-01-28 10:15:37,356 INFO L131 PetriNetUnfolder]: For 18700/18700 co-relation queries the response was YES. [2023-01-28 10:15:37,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15835 conditions, 2682 events. 1840/2682 cut-off events. For 18700/18700 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11464 event pairs, 193 based on Foata normal form. 1/2683 useless extension candidates. Maximal degree in co-relation 15752. Up to 2236 conditions per place. [2023-01-28 10:15:37,375 INFO L137 encePairwiseOnDemand]: 666/682 looper letters, 163 selfloop transitions, 94 changer transitions 1/258 dead transitions. [2023-01-28 10:15:37,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 258 transitions, 3269 flow [2023-01-28 10:15:37,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 10:15:37,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 10:15:37,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2715 transitions. [2023-01-28 10:15:37,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30622603203248366 [2023-01-28 10:15:37,378 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2715 transitions. [2023-01-28 10:15:37,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2715 transitions. [2023-01-28 10:15:37,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:37,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2715 transitions. [2023-01-28 10:15:37,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 208.84615384615384) internal successors, (2715), 13 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:37,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:37,387 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:37,388 INFO L175 Difference]: Start difference. First operand has 122 places, 199 transitions, 2316 flow. Second operand 13 states and 2715 transitions. [2023-01-28 10:15:37,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 258 transitions, 3269 flow [2023-01-28 10:15:37,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 258 transitions, 3049 flow, removed 30 selfloop flow, removed 6 redundant places. [2023-01-28 10:15:37,439 INFO L231 Difference]: Finished difference. Result has 130 places, 209 transitions, 2475 flow [2023-01-28 10:15:37,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=2096, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2475, PETRI_PLACES=130, PETRI_TRANSITIONS=209} [2023-01-28 10:15:37,440 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 98 predicate places. [2023-01-28 10:15:37,440 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 209 transitions, 2475 flow [2023-01-28 10:15:37,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 203.31034482758622) internal successors, (5896), 29 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:37,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:37,441 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] [2023-01-28 10:15:37,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-01-28 10:15:37,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 10:15:37,666 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:15:37,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:37,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1755339952, now seen corresponding path program 9 times [2023-01-28 10:15:37,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:37,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592614060] [2023-01-28 10:15:37,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:37,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:38,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:38,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592614060] [2023-01-28 10:15:38,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592614060] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:15:38,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053463405] [2023-01-28 10:15:38,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:15:38,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:38,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:15:38,296 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:15:38,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 10:15:38,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 10:15:38,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:15:38,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-01-28 10:15:38,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:15:38,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:15:38,489 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:15:38,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-01-28 10:15:38,681 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-01-28 10:15:38,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-01-28 10:15:38,790 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:38,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 106 [2023-01-28 10:15:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:38,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:15:41,427 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:41,427 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 52 treesize of output 40 [2023-01-28 10:15:41,442 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:15:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:41,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053463405] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:15:41,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:15:41,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 19 [2023-01-28 10:15:41,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672279786] [2023-01-28 10:15:41,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:15:41,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 10:15:41,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:41,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 10:15:41,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-01-28 10:15:41,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 682 [2023-01-28 10:15:41,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 209 transitions, 2475 flow. Second operand has 21 states, 21 states have (on average 223.47619047619048) internal successors, (4693), 21 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:41,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:41,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 682 [2023-01-28 10:15:41,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:42,426 INFO L130 PetriNetUnfolder]: 1928/2811 cut-off events. [2023-01-28 10:15:42,426 INFO L131 PetriNetUnfolder]: For 20972/20972 co-relation queries the response was YES. [2023-01-28 10:15:42,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16790 conditions, 2811 events. 1928/2811 cut-off events. For 20972/20972 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12166 event pairs, 234 based on Foata normal form. 1/2812 useless extension candidates. Maximal degree in co-relation 16700. Up to 2449 conditions per place. [2023-01-28 10:15:42,447 INFO L137 encePairwiseOnDemand]: 669/682 looper letters, 177 selfloop transitions, 85 changer transitions 1/263 dead transitions. [2023-01-28 10:15:42,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 263 transitions, 3393 flow [2023-01-28 10:15:42,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 10:15:42,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 10:15:42,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2528 transitions. [2023-01-28 10:15:42,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33697680618501735 [2023-01-28 10:15:42,451 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2528 transitions. [2023-01-28 10:15:42,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2528 transitions. [2023-01-28 10:15:42,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:42,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2528 transitions. [2023-01-28 10:15:42,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 229.8181818181818) internal successors, (2528), 11 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:42,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:42,460 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:42,460 INFO L175 Difference]: Start difference. First operand has 130 places, 209 transitions, 2475 flow. Second operand 11 states and 2528 transitions. [2023-01-28 10:15:42,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 263 transitions, 3393 flow [2023-01-28 10:15:42,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 263 transitions, 3102 flow, removed 80 selfloop flow, removed 7 redundant places. [2023-01-28 10:15:42,517 INFO L231 Difference]: Finished difference. Result has 135 places, 215 transitions, 2500 flow [2023-01-28 10:15:42,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=2216, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2500, PETRI_PLACES=135, PETRI_TRANSITIONS=215} [2023-01-28 10:15:42,518 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 103 predicate places. [2023-01-28 10:15:42,518 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 215 transitions, 2500 flow [2023-01-28 10:15:42,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 223.47619047619048) internal successors, (4693), 21 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:42,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:42,518 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] [2023-01-28 10:15:42,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 10:15:42,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 10:15:42,724 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:15:42,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:42,725 INFO L85 PathProgramCache]: Analyzing trace with hash -2002673658, now seen corresponding path program 10 times [2023-01-28 10:15:42,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:42,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266411822] [2023-01-28 10:15:42,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:42,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:43,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:43,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:43,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266411822] [2023-01-28 10:15:43,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266411822] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:15:43,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734456337] [2023-01-28 10:15:43,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:15:43,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:43,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:15:43,377 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:15:43,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 10:15:43,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:15:43,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:15:43,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 79 conjunts are in the unsatisfiable core [2023-01-28 10:15:43,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:15:43,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:15:43,681 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 [2023-01-28 10:15:43,811 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:43,811 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 28 treesize of output 20 [2023-01-28 10:15:43,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:43,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:15:43,993 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_945 (Array Int Int))) (<= .cse0 (+ c_~csum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_945) c_~A~0.base) c_~A~0.offset)))) (forall ((v_ArrVal_945 (Array Int Int))) (<= (+ c_~csum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_945) c_~A~0.base) c_~A~0.offset)) .cse0)))) is different from false [2023-01-28 10:15:44,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:44,006 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 48 treesize of output 36 [2023-01-28 10:15:44,009 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 14 treesize of output 12 [2023-01-28 10:15:44,017 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:15:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-01-28 10:15:44,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734456337] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:15:44,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:15:44,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2023-01-28 10:15:44,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475989002] [2023-01-28 10:15:44,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:15:44,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 10:15:44,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:44,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 10:15:44,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=645, Unknown=1, NotChecked=52, Total=812 [2023-01-28 10:15:44,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 682 [2023-01-28 10:15:44,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 215 transitions, 2500 flow. Second operand has 29 states, 29 states have (on average 233.27586206896552) internal successors, (6765), 29 states have internal predecessors, (6765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:44,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:44,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 682 [2023-01-28 10:15:44,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:45,151 INFO L130 PetriNetUnfolder]: 2168/3159 cut-off events. [2023-01-28 10:15:45,151 INFO L131 PetriNetUnfolder]: For 23303/23303 co-relation queries the response was YES. [2023-01-28 10:15:45,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18884 conditions, 3159 events. 2168/3159 cut-off events. For 23303/23303 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 14040 event pairs, 196 based on Foata normal form. 1/3160 useless extension candidates. Maximal degree in co-relation 18799. Up to 2558 conditions per place. [2023-01-28 10:15:45,172 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 186 selfloop transitions, 113 changer transitions 1/300 dead transitions. [2023-01-28 10:15:45,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 300 transitions, 3813 flow [2023-01-28 10:15:45,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 10:15:45,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 10:15:45,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2409 transitions. [2023-01-28 10:15:45,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3532258064516129 [2023-01-28 10:15:45,184 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2409 transitions. [2023-01-28 10:15:45,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2409 transitions. [2023-01-28 10:15:45,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:45,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2409 transitions. [2023-01-28 10:15:45,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 240.9) internal successors, (2409), 10 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:45,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:45,192 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:45,192 INFO L175 Difference]: Start difference. First operand has 135 places, 215 transitions, 2500 flow. Second operand 10 states and 2409 transitions. [2023-01-28 10:15:45,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 300 transitions, 3813 flow [2023-01-28 10:15:45,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 300 transitions, 3592 flow, removed 30 selfloop flow, removed 8 redundant places. [2023-01-28 10:15:45,256 INFO L231 Difference]: Finished difference. Result has 141 places, 245 transitions, 3051 flow [2023-01-28 10:15:45,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=2279, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3051, PETRI_PLACES=141, PETRI_TRANSITIONS=245} [2023-01-28 10:15:45,256 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 109 predicate places. [2023-01-28 10:15:45,256 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 245 transitions, 3051 flow [2023-01-28 10:15:45,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 233.27586206896552) internal successors, (6765), 29 states have internal predecessors, (6765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:45,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:45,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:15:45,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-28 10:15:45,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-28 10:15:45,463 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:15:45,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:45,463 INFO L85 PathProgramCache]: Analyzing trace with hash 714833744, now seen corresponding path program 11 times [2023-01-28 10:15:45,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:45,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851037672] [2023-01-28 10:15:45,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:45,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:46,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:46,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851037672] [2023-01-28 10:15:46,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851037672] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:15:46,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005600127] [2023-01-28 10:15:46,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:15:46,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:46,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:15:46,174 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:15:46,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 10:15:46,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 10:15:46,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:15:46,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 90 conjunts are in the unsatisfiable core [2023-01-28 10:15:46,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:15:46,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:15:46,374 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:15:46,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-01-28 10:15:46,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:15:46,552 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 [2023-01-28 10:15:46,679 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:15:46,702 INFO L321 Elim1Store]: treesize reduction 67, result has 22.1 percent of original size [2023-01-28 10:15:46,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 41 [2023-01-28 10:15:47,006 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:47,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 130 [2023-01-28 10:15:47,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:47,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:15:47,688 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~C~0.offset Int) (v_ArrVal_1013 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1013))) (let ((.cse0 (select (select .cse2 c_~A~0.base) c_~A~0.offset)) (.cse1 (select (select .cse2 c_~B~0.base) c_~B~0.offset))) (<= (+ .cse0 c_~csum~0 .cse1) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse2 c_~C~0.base (store (select .cse2 c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~B~0.base) c_~B~0.offset)))))) (forall ((~C~0.offset Int) (v_ArrVal_1013 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1013))) (let ((.cse4 (select (select .cse3 c_~A~0.base) c_~A~0.offset)) (.cse5 (select (select .cse3 c_~B~0.base) c_~B~0.offset))) (<= (+ c_~asum~0 c_~bsum~0 (select (select (store .cse3 c_~C~0.base (store (select .cse3 c_~C~0.base) ~C~0.offset (+ .cse4 .cse5))) c_~B~0.base) c_~B~0.offset)) (+ .cse4 c_~csum~0 .cse5)))))) is different from false [2023-01-28 10:15:47,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:47,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1622 treesize of output 1414 [2023-01-28 10:15:47,789 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:47,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 566 treesize of output 542 [2023-01-28 10:15:49,925 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 14 treesize of output 8 [2023-01-28 10:15:49,930 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:49,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 17 [2023-01-28 10:15:49,953 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 36 treesize of output 24 [2023-01-28 10:15:49,980 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 12 treesize of output 6 [2023-01-28 10:15:49,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:49,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 57 treesize of output 45 [2023-01-28 10:15:50,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:15:50,015 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-01-28 10:15:50,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 175 treesize of output 1 [2023-01-28 10:15:50,039 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:50,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 523 treesize of output 351 [2023-01-28 10:15:50,280 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:50,284 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:50,289 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:50,292 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:50,310 INFO L321 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2023-01-28 10:15:50,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 51 [2023-01-28 10:15:50,325 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:50,334 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 8 treesize of output 6 [2023-01-28 10:15:50,348 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:15:50,350 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:15:50,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 146 treesize of output 130 [2023-01-28 10:15:50,546 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:50,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 64 [2023-01-28 10:15:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-01-28 10:15:50,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005600127] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:15:50,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:15:50,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-01-28 10:15:50,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267630157] [2023-01-28 10:15:50,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:15:50,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 10:15:50,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:50,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 10:15:50,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=815, Unknown=1, NotChecked=58, Total=992 [2023-01-28 10:15:50,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 682 [2023-01-28 10:15:50,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 245 transitions, 3051 flow. Second operand has 32 states, 32 states have (on average 221.125) internal successors, (7076), 32 states have internal predecessors, (7076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:50,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:50,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 682 [2023-01-28 10:15:50,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:51,584 INFO L130 PetriNetUnfolder]: 2312/3368 cut-off events. [2023-01-28 10:15:51,584 INFO L131 PetriNetUnfolder]: For 30259/30259 co-relation queries the response was YES. [2023-01-28 10:15:51,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21145 conditions, 3368 events. 2312/3368 cut-off events. For 30259/30259 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 15158 event pairs, 188 based on Foata normal form. 1/3369 useless extension candidates. Maximal degree in co-relation 21056. Up to 2635 conditions per place. [2023-01-28 10:15:51,630 INFO L137 encePairwiseOnDemand]: 670/682 looper letters, 183 selfloop transitions, 121 changer transitions 1/305 dead transitions. [2023-01-28 10:15:51,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 305 transitions, 4160 flow [2023-01-28 10:15:51,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 10:15:51,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 10:15:51,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2727 transitions. [2023-01-28 10:15:51,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33321114369501464 [2023-01-28 10:15:51,642 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2727 transitions. [2023-01-28 10:15:51,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2727 transitions. [2023-01-28 10:15:51,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:51,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2727 transitions. [2023-01-28 10:15:51,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 227.25) internal successors, (2727), 12 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:51,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:51,649 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:51,649 INFO L175 Difference]: Start difference. First operand has 141 places, 245 transitions, 3051 flow. Second operand 12 states and 2727 transitions. [2023-01-28 10:15:51,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 305 transitions, 4160 flow [2023-01-28 10:15:51,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 305 transitions, 3932 flow, removed 97 selfloop flow, removed 3 redundant places. [2023-01-28 10:15:51,727 INFO L231 Difference]: Finished difference. Result has 151 places, 255 transitions, 3315 flow [2023-01-28 10:15:51,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=2837, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3315, PETRI_PLACES=151, PETRI_TRANSITIONS=255} [2023-01-28 10:15:51,728 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 119 predicate places. [2023-01-28 10:15:51,728 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 255 transitions, 3315 flow [2023-01-28 10:15:51,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 221.125) internal successors, (7076), 32 states have internal predecessors, (7076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:51,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:51,729 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] [2023-01-28 10:15:51,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-01-28 10:15:51,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:51,933 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:15:51,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:51,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1580879102, now seen corresponding path program 12 times [2023-01-28 10:15:51,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:51,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326785724] [2023-01-28 10:15:51,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:51,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:52,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:52,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326785724] [2023-01-28 10:15:52,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326785724] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:15:52,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038330450] [2023-01-28 10:15:52,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:15:52,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:52,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:15:52,553 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:15:52,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 10:15:52,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 10:15:52,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:15:52,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 79 conjunts are in the unsatisfiable core [2023-01-28 10:15:52,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:15:52,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:15:52,901 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 [2023-01-28 10:15:53,071 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:15:53,081 INFO L321 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2023-01-28 10:15:53,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 26 [2023-01-28 10:15:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:53,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:15:53,199 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~B~0.offset))) (and (forall ((v_ArrVal_1080 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1080))) (let ((.cse0 (select .cse2 ~B~0.base))) (<= (+ (select .cse0 .cse1) c_~asum~0 c_~bsum~0) (+ (select (select .cse2 c_~A~0.base) c_~A~0.offset) (select .cse0 c_~B~0.offset) c_~csum~0))))) (forall ((v_ArrVal_1080 (Array Int Int)) (~B~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1080))) (let ((.cse4 (select .cse3 ~B~0.base))) (<= (+ (select (select .cse3 c_~A~0.base) c_~A~0.offset) (select .cse4 c_~B~0.offset) c_~csum~0) (+ (select .cse4 .cse1) c_~asum~0 c_~bsum~0))))))) is different from false [2023-01-28 10:15:53,240 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:53,240 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 48 treesize of output 36 [2023-01-28 10:15:53,242 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 14 treesize of output 12 [2023-01-28 10:15:53,249 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:15:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:53,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038330450] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:15:53,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:15:53,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-01-28 10:15:53,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177427369] [2023-01-28 10:15:53,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:15:53,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 10:15:53,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:53,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 10:15:53,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=546, Unknown=8, NotChecked=48, Total=702 [2023-01-28 10:15:53,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 682 [2023-01-28 10:15:53,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 255 transitions, 3315 flow. Second operand has 27 states, 27 states have (on average 233.5185185185185) internal successors, (6305), 27 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:53,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:53,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 682 [2023-01-28 10:15:53,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:54,233 INFO L130 PetriNetUnfolder]: 2692/3924 cut-off events. [2023-01-28 10:15:54,234 INFO L131 PetriNetUnfolder]: For 33857/33857 co-relation queries the response was YES. [2023-01-28 10:15:54,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24652 conditions, 3924 events. 2692/3924 cut-off events. For 33857/33857 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18303 event pairs, 313 based on Foata normal form. 1/3925 useless extension candidates. Maximal degree in co-relation 24559. Up to 2964 conditions per place. [2023-01-28 10:15:54,263 INFO L137 encePairwiseOnDemand]: 671/682 looper letters, 191 selfloop transitions, 151 changer transitions 1/343 dead transitions. [2023-01-28 10:15:54,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 343 transitions, 4769 flow [2023-01-28 10:15:54,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 10:15:54,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 10:15:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2417 transitions. [2023-01-28 10:15:54,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3543988269794721 [2023-01-28 10:15:54,266 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2417 transitions. [2023-01-28 10:15:54,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2417 transitions. [2023-01-28 10:15:54,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:54,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2417 transitions. [2023-01-28 10:15:54,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 241.7) internal successors, (2417), 10 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:54,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:54,271 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:54,271 INFO L175 Difference]: Start difference. First operand has 151 places, 255 transitions, 3315 flow. Second operand 10 states and 2417 transitions. [2023-01-28 10:15:54,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 343 transitions, 4769 flow [2023-01-28 10:15:54,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 343 transitions, 4488 flow, removed 80 selfloop flow, removed 7 redundant places. [2023-01-28 10:15:54,388 INFO L231 Difference]: Finished difference. Result has 157 places, 286 transitions, 3929 flow [2023-01-28 10:15:54,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=3055, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3929, PETRI_PLACES=157, PETRI_TRANSITIONS=286} [2023-01-28 10:15:54,389 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 125 predicate places. [2023-01-28 10:15:54,389 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 286 transitions, 3929 flow [2023-01-28 10:15:54,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 233.5185185185185) internal successors, (6305), 27 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:54,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:54,389 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] [2023-01-28 10:15:54,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 10:15:54,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:54,593 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:15:54,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:54,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1968390524, now seen corresponding path program 13 times [2023-01-28 10:15:54,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:54,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886952778] [2023-01-28 10:15:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:54,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:55,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:55,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886952778] [2023-01-28 10:15:55,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886952778] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:15:55,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943141759] [2023-01-28 10:15:55,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:15:55,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:55,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:15:55,295 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:15:55,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 10:15:55,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:55,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 90 conjunts are in the unsatisfiable core [2023-01-28 10:15:55,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:15:55,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:15:55,518 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:15:55,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-01-28 10:15:55,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:15:55,729 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 [2023-01-28 10:15:55,823 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-01-28 10:15:55,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-01-28 10:15:56,039 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:56,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 106 [2023-01-28 10:15:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:15:56,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:15:57,069 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~B~0.offset))) (and (forall ((~C~0.offset Int) (v_ArrVal_1148 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1148))) (let ((.cse0 (select (select .cse2 c_~A~0.base) c_~A~0.offset)) (.cse1 (select (select .cse2 c_~B~0.base) c_~B~0.offset))) (<= (+ .cse0 c_~csum~0 .cse1) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse2 c_~C~0.base (store (select .cse2 c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~B~0.base) .cse3)))))) (forall ((~C~0.offset Int) (v_ArrVal_1148 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1148))) (let ((.cse5 (select (select .cse4 c_~A~0.base) c_~A~0.offset)) (.cse6 (select (select .cse4 c_~B~0.base) c_~B~0.offset))) (<= (+ c_~asum~0 c_~bsum~0 (select (select (store .cse4 c_~C~0.base (store (select .cse4 c_~C~0.base) ~C~0.offset (+ .cse5 .cse6))) c_~B~0.base) .cse3)) (+ .cse5 c_~csum~0 .cse6))))))) is different from false [2023-01-28 10:15:57,084 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~C~0.offset Int) (v_ArrVal_1148 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1148))) (let ((.cse0 (select (select .cse2 c_~A~0.base) c_~A~0.offset)) (.cse1 (select (select .cse2 c_~B~0.base) c_~B~0.offset))) (<= (+ .cse0 c_~csum~0 .cse1) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse2 c_~C~0.base (store (select .cse2 c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~B~0.base) c_~B~0.offset)))))) (forall ((~C~0.offset Int) (v_ArrVal_1148 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1148))) (let ((.cse4 (select (select .cse3 c_~A~0.base) c_~A~0.offset)) (.cse5 (select (select .cse3 c_~B~0.base) c_~B~0.offset))) (<= (+ c_~asum~0 c_~bsum~0 (select (select (store .cse3 c_~C~0.base (store (select .cse3 c_~C~0.base) ~C~0.offset (+ .cse4 .cse5))) c_~B~0.base) c_~B~0.offset)) (+ .cse4 c_~csum~0 .cse5)))))) is different from false [2023-01-28 10:15:57,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:57,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2582 treesize of output 2254 [2023-01-28 10:15:57,144 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:57,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 566 treesize of output 542 [2023-01-28 10:15:59,529 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:59,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 86 treesize of output 68 [2023-01-28 10:15:59,534 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 54 treesize of output 52 [2023-01-28 10:15:59,557 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:59,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 17 [2023-01-28 10:15:59,564 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 14 treesize of output 8 [2023-01-28 10:15:59,576 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:59,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 142 treesize of output 104 [2023-01-28 10:15:59,582 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 100 treesize of output 92 [2023-01-28 10:15:59,639 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:59,668 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:59,680 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 8 treesize of output 6 [2023-01-28 10:15:59,706 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:59,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 17 [2023-01-28 10:15:59,714 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 14 treesize of output 8 [2023-01-28 10:15:59,722 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:59,725 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:59,734 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:59,739 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:59,743 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:59,752 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:59,756 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:59,760 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:59,764 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:59,864 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:59,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 17 [2023-01-28 10:15:59,877 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:59,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 17 [2023-01-28 10:15:59,888 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:59,900 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:59,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 150 treesize of output 110 [2023-01-28 10:15:59,907 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 65 treesize of output 61 [2023-01-28 10:15:59,953 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:59,956 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:59,961 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:59,968 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:59,971 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:59,976 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:59,981 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:59,985 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:15:59,988 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:00,043 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:00,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 267 treesize of output 193 [2023-01-28 10:16:00,365 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-01-28 10:16:00,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 162 treesize of output 1 [2023-01-28 10:16:00,386 INFO L321 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2023-01-28 10:16:00,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 163 treesize of output 110 [2023-01-28 10:16:00,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:16:00,418 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:00,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 105 treesize of output 74 [2023-01-28 10:16:00,446 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:00,450 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:00,455 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:00,462 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 14 treesize of output 8 [2023-01-28 10:16:00,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:16:00,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-01-28 10:16:00,475 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:00,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:16:00,482 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-01-28 10:16:00,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 96 treesize of output 1 [2023-01-28 10:16:00,487 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:00,490 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:00,495 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:00,531 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:16:00,533 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:16:00,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 146 treesize of output 130 [2023-01-28 10:16:00,693 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:00,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 64 [2023-01-28 10:16:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-01-28 10:16:00,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943141759] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:00,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:00,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-01-28 10:16:00,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382048973] [2023-01-28 10:16:00,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:00,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 10:16:00,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:00,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 10:16:00,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=710, Unknown=2, NotChecked=110, Total=930 [2023-01-28 10:16:00,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 682 [2023-01-28 10:16:00,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 286 transitions, 3929 flow. Second operand has 31 states, 31 states have (on average 206.25806451612902) internal successors, (6394), 31 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:00,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:00,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 682 [2023-01-28 10:16:00,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:01,920 INFO L130 PetriNetUnfolder]: 2780/4053 cut-off events. [2023-01-28 10:16:01,920 INFO L131 PetriNetUnfolder]: For 35317/35317 co-relation queries the response was YES. [2023-01-28 10:16:01,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26380 conditions, 4053 events. 2780/4053 cut-off events. For 35317/35317 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 18999 event pairs, 375 based on Foata normal form. 1/4054 useless extension candidates. Maximal degree in co-relation 26283. Up to 3471 conditions per place. [2023-01-28 10:16:01,948 INFO L137 encePairwiseOnDemand]: 670/682 looper letters, 220 selfloop transitions, 117 changer transitions 1/338 dead transitions. [2023-01-28 10:16:01,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 338 transitions, 4985 flow [2023-01-28 10:16:01,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 10:16:01,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 10:16:01,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2547 transitions. [2023-01-28 10:16:01,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31121700879765396 [2023-01-28 10:16:01,950 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2547 transitions. [2023-01-28 10:16:01,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2547 transitions. [2023-01-28 10:16:01,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:01,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2547 transitions. [2023-01-28 10:16:01,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 212.25) internal successors, (2547), 12 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:01,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:01,956 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:01,956 INFO L175 Difference]: Start difference. First operand has 157 places, 286 transitions, 3929 flow. Second operand 12 states and 2547 transitions. [2023-01-28 10:16:01,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 338 transitions, 4985 flow [2023-01-28 10:16:02,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 338 transitions, 4789 flow, removed 81 selfloop flow, removed 3 redundant places. [2023-01-28 10:16:02,065 INFO L231 Difference]: Finished difference. Result has 168 places, 293 transitions, 4165 flow [2023-01-28 10:16:02,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=3733, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4165, PETRI_PLACES=168, PETRI_TRANSITIONS=293} [2023-01-28 10:16:02,066 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 136 predicate places. [2023-01-28 10:16:02,066 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 293 transitions, 4165 flow [2023-01-28 10:16:02,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 206.25806451612902) internal successors, (6394), 31 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:02,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:02,066 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] [2023-01-28 10:16:02,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 10:16:02,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:02,271 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:16:02,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:02,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1358423994, now seen corresponding path program 14 times [2023-01-28 10:16:02,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:02,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917210246] [2023-01-28 10:16:02,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:02,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:02,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:02,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:02,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917210246] [2023-01-28 10:16:02,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917210246] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:02,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38053951] [2023-01-28 10:16:02,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:16:02,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:02,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:02,827 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:16:02,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 10:16:02,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:16:02,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:16:02,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 80 conjunts are in the unsatisfiable core [2023-01-28 10:16:02,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:02,976 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 96 treesize of output 94 [2023-01-28 10:16:03,136 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 21 treesize of output 21 [2023-01-28 10:16:03,247 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:03,248 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 35 treesize of output 23 [2023-01-28 10:16:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:03,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:03,383 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~B~0.offset))) (and (forall ((v_ArrVal_1218 (Array Int Int)) (~B~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1218))) (let ((.cse0 (select .cse1 ~B~0.base))) (<= (+ (select .cse0 c_~B~0.offset) c_~csum~0 (select (select .cse1 c_~A~0.base) c_~A~0.offset)) (+ c_~asum~0 c_~bsum~0 (select .cse0 .cse2)))))) (forall ((v_ArrVal_1218 (Array Int Int)) (~B~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1218))) (let ((.cse3 (select .cse4 ~B~0.base))) (<= (+ c_~asum~0 c_~bsum~0 (select .cse3 .cse2)) (+ (select .cse3 c_~B~0.offset) c_~csum~0 (select (select .cse4 c_~A~0.base) c_~A~0.offset)))))))) is different from false [2023-01-28 10:16:03,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:03,430 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 48 treesize of output 36 [2023-01-28 10:16:03,432 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 14 treesize of output 12 [2023-01-28 10:16:03,440 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:16:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:03,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38053951] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:03,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:03,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 19 [2023-01-28 10:16:03,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998140865] [2023-01-28 10:16:03,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:03,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 10:16:03,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:03,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 10:16:03,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=311, Unknown=8, NotChecked=36, Total=420 [2023-01-28 10:16:03,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 682 [2023-01-28 10:16:03,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 293 transitions, 4165 flow. Second operand has 21 states, 21 states have (on average 233.61904761904762) internal successors, (4906), 21 states have internal predecessors, (4906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:03,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:03,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 682 [2023-01-28 10:16:03,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:04,530 INFO L130 PetriNetUnfolder]: 2840/4142 cut-off events. [2023-01-28 10:16:04,530 INFO L131 PetriNetUnfolder]: For 36959/36959 co-relation queries the response was YES. [2023-01-28 10:16:04,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27326 conditions, 4142 events. 2840/4142 cut-off events. For 36959/36959 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 19524 event pairs, 377 based on Foata normal form. 1/4143 useless extension candidates. Maximal degree in co-relation 27224. Up to 3518 conditions per place. [2023-01-28 10:16:04,555 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 228 selfloop transitions, 118 changer transitions 1/347 dead transitions. [2023-01-28 10:16:04,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 347 transitions, 5263 flow [2023-01-28 10:16:04,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 10:16:04,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 10:16:04,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2411 transitions. [2023-01-28 10:16:04,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3535190615835777 [2023-01-28 10:16:04,558 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2411 transitions. [2023-01-28 10:16:04,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2411 transitions. [2023-01-28 10:16:04,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:04,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2411 transitions. [2023-01-28 10:16:04,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 241.1) internal successors, (2411), 10 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:04,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:04,563 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:04,563 INFO L175 Difference]: Start difference. First operand has 168 places, 293 transitions, 4165 flow. Second operand 10 states and 2411 transitions. [2023-01-28 10:16:04,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 347 transitions, 5263 flow [2023-01-28 10:16:04,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 347 transitions, 4988 flow, removed 33 selfloop flow, removed 8 redundant places. [2023-01-28 10:16:04,654 INFO L231 Difference]: Finished difference. Result has 171 places, 300 transitions, 4301 flow [2023-01-28 10:16:04,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=3892, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4301, PETRI_PLACES=171, PETRI_TRANSITIONS=300} [2023-01-28 10:16:04,654 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 139 predicate places. [2023-01-28 10:16:04,654 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 300 transitions, 4301 flow [2023-01-28 10:16:04,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 233.61904761904762) internal successors, (4906), 21 states have internal predecessors, (4906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:04,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:04,655 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] [2023-01-28 10:16:04,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-01-28 10:16:04,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:04,860 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:16:04,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:04,860 INFO L85 PathProgramCache]: Analyzing trace with hash 334026134, now seen corresponding path program 15 times [2023-01-28 10:16:04,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:04,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505901890] [2023-01-28 10:16:04,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:04,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:05,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:05,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505901890] [2023-01-28 10:16:05,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505901890] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:05,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289161773] [2023-01-28 10:16:05,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:16:05,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:05,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:05,482 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:16:05,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 10:16:05,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:16:05,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:16:05,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-01-28 10:16:05,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:05,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:16:05,699 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:16:05,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-01-28 10:16:05,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:16:05,858 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 [2023-01-28 10:16:05,962 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-01-28 10:16:05,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-01-28 10:16:06,139 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:06,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 106 [2023-01-28 10:16:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:06,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:06,852 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~C~0.offset Int) (v_ArrVal_1286 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1286))) (let ((.cse1 (select (select .cse0 c_~B~0.base) c_~B~0.offset)) (.cse2 (select (select .cse0 c_~A~0.base) c_~A~0.offset))) (<= (+ (select (select (store .cse0 c_~C~0.base (store (select .cse0 c_~C~0.base) ~C~0.offset (+ .cse1 .cse2))) c_~B~0.base) c_~B~0.offset) c_~asum~0 c_~bsum~0) (+ .cse1 .cse2 c_~csum~0))))) (forall ((~C~0.offset Int) (v_ArrVal_1286 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1286))) (let ((.cse3 (select (select .cse5 c_~B~0.base) c_~B~0.offset)) (.cse4 (select (select .cse5 c_~A~0.base) c_~A~0.offset))) (<= (+ .cse3 .cse4 c_~csum~0) (+ (select (select (store .cse5 c_~C~0.base (store (select .cse5 c_~C~0.base) ~C~0.offset (+ .cse3 .cse4))) c_~B~0.base) c_~B~0.offset) c_~asum~0 c_~bsum~0)))))) is different from false [2023-01-28 10:16:06,882 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:06,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1286 treesize of output 1134 [2023-01-28 10:16:06,910 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:06,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 566 treesize of output 542 [2023-01-28 10:16:09,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:09,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 80 [2023-01-28 10:16:09,482 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:09,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 95 [2023-01-28 10:16:09,570 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:09,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 17 [2023-01-28 10:16:09,580 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:09,583 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:09,586 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:09,588 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:09,591 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:09,598 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:09,600 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:09,605 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 12 treesize of output 6 [2023-01-28 10:16:09,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:09,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 90 treesize of output 70 [2023-01-28 10:16:09,648 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:09,651 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:09,668 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:09,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 120 [2023-01-28 10:16:09,725 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 10:16:09,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 349 treesize of output 1 [2023-01-28 10:16:09,824 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:09,829 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:09,832 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:09,837 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:09,839 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:09,848 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 349 treesize of output 329 [2023-01-28 10:16:09,867 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 270 treesize of output 242 [2023-01-28 10:16:09,913 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:09,915 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:09,938 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:09,941 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:09,945 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:09,950 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:09,954 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:09,958 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:09,961 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:09,973 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 10:16:09,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 349 treesize of output 1 [2023-01-28 10:16:09,983 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:16:09,984 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:16:09,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 146 treesize of output 130 [2023-01-28 10:16:10,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-01-28 10:16:10,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289161773] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:10,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:10,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-01-28 10:16:10,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853707224] [2023-01-28 10:16:10,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:10,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 10:16:10,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:10,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 10:16:10,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=706, Unknown=1, NotChecked=54, Total=870 [2023-01-28 10:16:10,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 682 [2023-01-28 10:16:10,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 300 transitions, 4301 flow. Second operand has 30 states, 30 states have (on average 221.26666666666668) internal successors, (6638), 30 states have internal predecessors, (6638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:10,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:10,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 682 [2023-01-28 10:16:10,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:11,395 INFO L130 PetriNetUnfolder]: 2928/4271 cut-off events. [2023-01-28 10:16:11,395 INFO L131 PetriNetUnfolder]: For 39004/39004 co-relation queries the response was YES. [2023-01-28 10:16:11,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28272 conditions, 4271 events. 2928/4271 cut-off events. For 39004/39004 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20273 event pairs, 352 based on Foata normal form. 1/4272 useless extension candidates. Maximal degree in co-relation 28169. Up to 3685 conditions per place. [2023-01-28 10:16:11,428 INFO L137 encePairwiseOnDemand]: 670/682 looper letters, 238 selfloop transitions, 115 changer transitions 1/354 dead transitions. [2023-01-28 10:16:11,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 354 transitions, 5405 flow [2023-01-28 10:16:11,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 10:16:11,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 10:16:11,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2725 transitions. [2023-01-28 10:16:11,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3329667644183773 [2023-01-28 10:16:11,431 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2725 transitions. [2023-01-28 10:16:11,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2725 transitions. [2023-01-28 10:16:11,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:11,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2725 transitions. [2023-01-28 10:16:11,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 227.08333333333334) internal successors, (2725), 12 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:11,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:11,437 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:11,437 INFO L175 Difference]: Start difference. First operand has 171 places, 300 transitions, 4301 flow. Second operand 12 states and 2725 transitions. [2023-01-28 10:16:11,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 354 transitions, 5405 flow [2023-01-28 10:16:11,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 354 transitions, 5090 flow, removed 50 selfloop flow, removed 7 redundant places. [2023-01-28 10:16:11,548 INFO L231 Difference]: Finished difference. Result has 177 places, 306 transitions, 4371 flow [2023-01-28 10:16:11,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=3992, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4371, PETRI_PLACES=177, PETRI_TRANSITIONS=306} [2023-01-28 10:16:11,549 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 145 predicate places. [2023-01-28 10:16:11,549 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 306 transitions, 4371 flow [2023-01-28 10:16:11,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 221.26666666666668) internal successors, (6638), 30 states have internal predecessors, (6638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:11,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:11,550 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] [2023-01-28 10:16:11,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-28 10:16:11,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:11,753 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:16:11,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:11,753 INFO L85 PathProgramCache]: Analyzing trace with hash 622578974, now seen corresponding path program 16 times [2023-01-28 10:16:11,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:11,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116987389] [2023-01-28 10:16:11,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:11,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:12,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:12,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116987389] [2023-01-28 10:16:12,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116987389] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:12,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514726618] [2023-01-28 10:16:12,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:16:12,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:12,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:12,324 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:16:12,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 10:16:12,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:16:12,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:16:12,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 10:16:12,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:12,806 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:16:12,817 INFO L321 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2023-01-28 10:16:12,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 26 [2023-01-28 10:16:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:12,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:12,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:12,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 87 [2023-01-28 10:16:13,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:13,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514726618] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:13,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:13,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-01-28 10:16:13,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793597557] [2023-01-28 10:16:13,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:13,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 10:16:13,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:13,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 10:16:13,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-01-28 10:16:13,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 682 [2023-01-28 10:16:13,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 306 transitions, 4371 flow. Second operand has 17 states, 17 states have (on average 238.11764705882354) internal successors, (4048), 17 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:13,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:13,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 682 [2023-01-28 10:16:13,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:14,000 INFO L130 PetriNetUnfolder]: 3177/4635 cut-off events. [2023-01-28 10:16:14,000 INFO L131 PetriNetUnfolder]: For 46009/46009 co-relation queries the response was YES. [2023-01-28 10:16:14,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31357 conditions, 4635 events. 3177/4635 cut-off events. For 46009/46009 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22215 event pairs, 984 based on Foata normal form. 1/4636 useless extension candidates. Maximal degree in co-relation 31251. Up to 4296 conditions per place. [2023-01-28 10:16:14,032 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 313 selfloop transitions, 67 changer transitions 1/381 dead transitions. [2023-01-28 10:16:14,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 381 transitions, 6124 flow [2023-01-28 10:16:14,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 10:16:14,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 10:16:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2214 transitions. [2023-01-28 10:16:14,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2023-01-28 10:16:14,035 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2214 transitions. [2023-01-28 10:16:14,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2214 transitions. [2023-01-28 10:16:14,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:14,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2214 transitions. [2023-01-28 10:16:14,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:14,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:14,040 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:14,040 INFO L175 Difference]: Start difference. First operand has 177 places, 306 transitions, 4371 flow. Second operand 9 states and 2214 transitions. [2023-01-28 10:16:14,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 381 transitions, 6124 flow [2023-01-28 10:16:14,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 381 transitions, 5772 flow, removed 48 selfloop flow, removed 9 redundant places. [2023-01-28 10:16:14,155 INFO L231 Difference]: Finished difference. Result has 180 places, 339 transitions, 4975 flow [2023-01-28 10:16:14,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=4077, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4975, PETRI_PLACES=180, PETRI_TRANSITIONS=339} [2023-01-28 10:16:14,156 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 148 predicate places. [2023-01-28 10:16:14,156 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 339 transitions, 4975 flow [2023-01-28 10:16:14,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 238.11764705882354) internal successors, (4048), 17 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:14,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:14,157 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, 1, 1, 1, 1] [2023-01-28 10:16:14,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-28 10:16:14,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:14,361 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:16:14,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:14,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1723736996, now seen corresponding path program 17 times [2023-01-28 10:16:14,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:14,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39616744] [2023-01-28 10:16:14,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:14,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:14,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:14,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:14,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39616744] [2023-01-28 10:16:14,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39616744] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:14,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809240698] [2023-01-28 10:16:14,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:16:14,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:14,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:14,894 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:16:14,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 10:16:15,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:16:15,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:16:15,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 10:16:15,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:15,287 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:16:15,296 INFO L321 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2023-01-28 10:16:15,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 26 [2023-01-28 10:16:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:15,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:15,418 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:15,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 87 [2023-01-28 10:16:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:15,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809240698] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:15,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:15,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-01-28 10:16:15,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818356908] [2023-01-28 10:16:15,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:15,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 10:16:15,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:15,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 10:16:15,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-01-28 10:16:15,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 682 [2023-01-28 10:16:15,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 339 transitions, 4975 flow. Second operand has 17 states, 17 states have (on average 238.0) internal successors, (4046), 17 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:15,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:15,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 682 [2023-01-28 10:16:15,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:16,675 INFO L130 PetriNetUnfolder]: 3371/4920 cut-off events. [2023-01-28 10:16:16,675 INFO L131 PetriNetUnfolder]: For 50419/50419 co-relation queries the response was YES. [2023-01-28 10:16:16,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33296 conditions, 4920 events. 3371/4920 cut-off events. For 50419/50419 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23914 event pairs, 1061 based on Foata normal form. 1/4921 useless extension candidates. Maximal degree in co-relation 33188. Up to 4647 conditions per place. [2023-01-28 10:16:16,715 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 341 selfloop transitions, 55 changer transitions 1/397 dead transitions. [2023-01-28 10:16:16,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 397 transitions, 6373 flow [2023-01-28 10:16:16,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 10:16:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 10:16:16,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2214 transitions. [2023-01-28 10:16:16,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2023-01-28 10:16:16,717 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2214 transitions. [2023-01-28 10:16:16,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2214 transitions. [2023-01-28 10:16:16,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:16,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2214 transitions. [2023-01-28 10:16:16,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:16,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:16,722 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:16,722 INFO L175 Difference]: Start difference. First operand has 180 places, 339 transitions, 4975 flow. Second operand 9 states and 2214 transitions. [2023-01-28 10:16:16,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 397 transitions, 6373 flow [2023-01-28 10:16:16,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 397 transitions, 6160 flow, removed 102 selfloop flow, removed 1 redundant places. [2023-01-28 10:16:16,858 INFO L231 Difference]: Finished difference. Result has 191 places, 355 transitions, 5263 flow [2023-01-28 10:16:16,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=4769, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5263, PETRI_PLACES=191, PETRI_TRANSITIONS=355} [2023-01-28 10:16:16,859 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 159 predicate places. [2023-01-28 10:16:16,859 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 355 transitions, 5263 flow [2023-01-28 10:16:16,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 238.0) internal successors, (4046), 17 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:16,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:16,859 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] [2023-01-28 10:16:16,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-01-28 10:16:17,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-01-28 10:16:17,064 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:16:17,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:17,065 INFO L85 PathProgramCache]: Analyzing trace with hash 340804554, now seen corresponding path program 18 times [2023-01-28 10:16:17,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:17,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064575476] [2023-01-28 10:16:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:17,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:17,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:17,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:17,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064575476] [2023-01-28 10:16:17,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064575476] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:17,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859343183] [2023-01-28 10:16:17,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:16:17,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:17,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:17,524 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:16:17,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 10:16:17,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 10:16:17,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:16:17,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 10:16:17,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:17,878 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:17,878 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 35 treesize of output 23 [2023-01-28 10:16:17,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:17,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:18,015 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:18,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 87 [2023-01-28 10:16:18,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:16:18,130 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:18,130 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 20 treesize of output 13 [2023-01-28 10:16:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:18,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859343183] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:18,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:18,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 16 [2023-01-28 10:16:18,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866349466] [2023-01-28 10:16:18,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:18,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 10:16:18,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:18,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 10:16:18,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-01-28 10:16:18,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 682 [2023-01-28 10:16:18,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 355 transitions, 5263 flow. Second operand has 18 states, 18 states have (on average 237.94444444444446) internal successors, (4283), 18 states have internal predecessors, (4283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:18,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:18,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 682 [2023-01-28 10:16:18,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:19,320 INFO L130 PetriNetUnfolder]: 3537/5165 cut-off events. [2023-01-28 10:16:19,320 INFO L131 PetriNetUnfolder]: For 55254/55254 co-relation queries the response was YES. [2023-01-28 10:16:19,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35016 conditions, 5165 events. 3537/5165 cut-off events. For 55254/55254 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 25305 event pairs, 1134 based on Foata normal form. 1/5166 useless extension candidates. Maximal degree in co-relation 34903. Up to 4858 conditions per place. [2023-01-28 10:16:19,356 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 354 selfloop transitions, 63 changer transitions 1/418 dead transitions. [2023-01-28 10:16:19,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 418 transitions, 6859 flow [2023-01-28 10:16:19,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 10:16:19,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 10:16:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2216 transitions. [2023-01-28 10:16:19,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.361029651352232 [2023-01-28 10:16:19,358 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2216 transitions. [2023-01-28 10:16:19,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2216 transitions. [2023-01-28 10:16:19,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:19,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2216 transitions. [2023-01-28 10:16:19,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 246.22222222222223) internal successors, (2216), 9 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:19,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:19,363 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:19,363 INFO L175 Difference]: Start difference. First operand has 191 places, 355 transitions, 5263 flow. Second operand 9 states and 2216 transitions. [2023-01-28 10:16:19,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 418 transitions, 6859 flow [2023-01-28 10:16:19,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 418 transitions, 6599 flow, removed 124 selfloop flow, removed 1 redundant places. [2023-01-28 10:16:19,492 INFO L231 Difference]: Finished difference. Result has 201 places, 374 transitions, 5656 flow [2023-01-28 10:16:19,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=5003, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5656, PETRI_PLACES=201, PETRI_TRANSITIONS=374} [2023-01-28 10:16:19,493 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 169 predicate places. [2023-01-28 10:16:19,493 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 374 transitions, 5656 flow [2023-01-28 10:16:19,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 237.94444444444446) internal successors, (4283), 18 states have internal predecessors, (4283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:19,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:19,494 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] [2023-01-28 10:16:19,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-01-28 10:16:19,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-01-28 10:16:19,699 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:16:19,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:19,699 INFO L85 PathProgramCache]: Analyzing trace with hash 414640658, now seen corresponding path program 19 times [2023-01-28 10:16:19,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:19,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367550086] [2023-01-28 10:16:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:19,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:20,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:20,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367550086] [2023-01-28 10:16:20,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367550086] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:20,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63161654] [2023-01-28 10:16:20,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:16:20,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:20,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:20,171 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:16:20,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 10:16:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:20,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 10:16:20,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:20,504 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:20,504 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 35 treesize of output 23 [2023-01-28 10:16:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:20,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:20,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:20,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 87 [2023-01-28 10:16:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:20,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63161654] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:20,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:20,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 14 [2023-01-28 10:16:20,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787351958] [2023-01-28 10:16:20,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:20,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 10:16:20,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:20,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 10:16:20,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-01-28 10:16:20,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 682 [2023-01-28 10:16:20,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 374 transitions, 5656 flow. Second operand has 16 states, 16 states have (on average 238.1875) internal successors, (3811), 16 states have internal predecessors, (3811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:20,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:20,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 682 [2023-01-28 10:16:20,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:21,807 INFO L130 PetriNetUnfolder]: 3637/5312 cut-off events. [2023-01-28 10:16:21,807 INFO L131 PetriNetUnfolder]: For 57333/57333 co-relation queries the response was YES. [2023-01-28 10:16:21,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35528 conditions, 5312 events. 3637/5312 cut-off events. For 57333/57333 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 26183 event pairs, 1187 based on Foata normal form. 1/5313 useless extension candidates. Maximal degree in co-relation 35411. Up to 5109 conditions per place. [2023-01-28 10:16:21,853 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 364 selfloop transitions, 54 changer transitions 1/419 dead transitions. [2023-01-28 10:16:21,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 419 transitions, 6895 flow [2023-01-28 10:16:21,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 10:16:21,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 10:16:21,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2206 transitions. [2023-01-28 10:16:21,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3594004561746497 [2023-01-28 10:16:21,855 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2206 transitions. [2023-01-28 10:16:21,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2206 transitions. [2023-01-28 10:16:21,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:21,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2206 transitions. [2023-01-28 10:16:21,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 245.11111111111111) internal successors, (2206), 9 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:21,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:21,860 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:21,860 INFO L175 Difference]: Start difference. First operand has 201 places, 374 transitions, 5656 flow. Second operand 9 states and 2206 transitions. [2023-01-28 10:16:21,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 419 transitions, 6895 flow [2023-01-28 10:16:22,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 419 transitions, 6587 flow, removed 131 selfloop flow, removed 3 redundant places. [2023-01-28 10:16:22,013 INFO L231 Difference]: Finished difference. Result has 209 places, 384 transitions, 5654 flow [2023-01-28 10:16:22,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=5348, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5654, PETRI_PLACES=209, PETRI_TRANSITIONS=384} [2023-01-28 10:16:22,014 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 177 predicate places. [2023-01-28 10:16:22,014 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 384 transitions, 5654 flow [2023-01-28 10:16:22,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 238.1875) internal successors, (3811), 16 states have internal predecessors, (3811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:22,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:22,014 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] [2023-01-28 10:16:22,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-28 10:16:22,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-28 10:16:22,220 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:16:22,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:22,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1784586078, now seen corresponding path program 20 times [2023-01-28 10:16:22,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:22,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703488890] [2023-01-28 10:16:22,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:22,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:16:23,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:23,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703488890] [2023-01-28 10:16:23,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703488890] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:23,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339374283] [2023-01-28 10:16:23,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:16:23,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:23,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:23,132 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:16:23,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 10:16:23,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:16:23,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:16:23,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 94 conjunts are in the unsatisfiable core [2023-01-28 10:16:23,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:23,336 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-01-28 10:16:23,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-01-28 10:16:23,383 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-01-28 10:16:23,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-01-28 10:16:23,451 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:16:23,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-01-28 10:16:23,638 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-01-28 10:16:23,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-01-28 10:16:23,776 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:23,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 106 [2023-01-28 10:16:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:23,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:24,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:24,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 118 [2023-01-28 10:16:25,213 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:16:25,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:16:25,219 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:25,219 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 20 treesize of output 13 [2023-01-28 10:16:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:25,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339374283] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:25,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:25,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2023-01-28 10:16:25,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969939646] [2023-01-28 10:16:25,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:25,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 10:16:25,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:25,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 10:16:25,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2023-01-28 10:16:25,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 682 [2023-01-28 10:16:25,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 384 transitions, 5654 flow. Second operand has 29 states, 29 states have (on average 203.13793103448276) internal successors, (5891), 29 states have internal predecessors, (5891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:25,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:25,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 682 [2023-01-28 10:16:25,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:27,097 INFO L130 PetriNetUnfolder]: 3717/5429 cut-off events. [2023-01-28 10:16:27,097 INFO L131 PetriNetUnfolder]: For 57723/57723 co-relation queries the response was YES. [2023-01-28 10:16:27,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35757 conditions, 5429 events. 3717/5429 cut-off events. For 57723/57723 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 26903 event pairs, 1229 based on Foata normal form. 1/5430 useless extension candidates. Maximal degree in co-relation 35636. Up to 5240 conditions per place. [2023-01-28 10:16:27,148 INFO L137 encePairwiseOnDemand]: 668/682 looper letters, 361 selfloop transitions, 59 changer transitions 1/421 dead transitions. [2023-01-28 10:16:27,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 421 transitions, 6894 flow [2023-01-28 10:16:27,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 10:16:27,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 10:16:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2903 transitions. [2023-01-28 10:16:27,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3040427314620863 [2023-01-28 10:16:27,151 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2903 transitions. [2023-01-28 10:16:27,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2903 transitions. [2023-01-28 10:16:27,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:27,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2903 transitions. [2023-01-28 10:16:27,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 207.35714285714286) internal successors, (2903), 14 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:27,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 682.0) internal successors, (10230), 15 states have internal predecessors, (10230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:27,157 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 682.0) internal successors, (10230), 15 states have internal predecessors, (10230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:27,157 INFO L175 Difference]: Start difference. First operand has 209 places, 384 transitions, 5654 flow. Second operand 14 states and 2903 transitions. [2023-01-28 10:16:27,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 421 transitions, 6894 flow [2023-01-28 10:16:27,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 421 transitions, 6682 flow, removed 57 selfloop flow, removed 5 redundant places. [2023-01-28 10:16:27,305 INFO L231 Difference]: Finished difference. Result has 219 places, 390 transitions, 5760 flow [2023-01-28 10:16:27,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=5442, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5760, PETRI_PLACES=219, PETRI_TRANSITIONS=390} [2023-01-28 10:16:27,306 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 187 predicate places. [2023-01-28 10:16:27,306 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 390 transitions, 5760 flow [2023-01-28 10:16:27,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 203.13793103448276) internal successors, (5891), 29 states have internal predecessors, (5891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:27,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:27,307 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] [2023-01-28 10:16:27,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-28 10:16:27,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:27,512 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:16:27,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:27,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1666852562, now seen corresponding path program 21 times [2023-01-28 10:16:27,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:27,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619163418] [2023-01-28 10:16:27,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:27,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:16:28,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:28,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619163418] [2023-01-28 10:16:28,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619163418] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:28,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317888912] [2023-01-28 10:16:28,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:16:28,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:28,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:28,362 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:16:28,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 10:16:28,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:16:28,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:16:28,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-01-28 10:16:28,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:28,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:16:28,609 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:16:28,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-01-28 10:16:28,903 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:16:28,921 INFO L321 Elim1Store]: treesize reduction 67, result has 22.1 percent of original size [2023-01-28 10:16:28,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 41 [2023-01-28 10:16:29,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:29,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 121 treesize of output 133 [2023-01-28 10:16:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:29,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:31,156 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:31,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 118 [2023-01-28 10:16:31,393 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:16:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:31,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317888912] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:31,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:31,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 26 [2023-01-28 10:16:31,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697687011] [2023-01-28 10:16:31,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:31,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 10:16:31,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:31,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 10:16:31,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2023-01-28 10:16:31,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 682 [2023-01-28 10:16:31,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 390 transitions, 5760 flow. Second operand has 28 states, 28 states have (on average 203.42857142857142) internal successors, (5696), 28 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:31,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:31,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 682 [2023-01-28 10:16:31,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:33,262 INFO L130 PetriNetUnfolder]: 3805/5558 cut-off events. [2023-01-28 10:16:33,262 INFO L131 PetriNetUnfolder]: For 61049/61049 co-relation queries the response was YES. [2023-01-28 10:16:33,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36561 conditions, 5558 events. 3805/5558 cut-off events. For 61049/61049 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 27719 event pairs, 1257 based on Foata normal form. 1/5559 useless extension candidates. Maximal degree in co-relation 36434. Up to 5343 conditions per place. [2023-01-28 10:16:33,313 INFO L137 encePairwiseOnDemand]: 667/682 looper letters, 368 selfloop transitions, 65 changer transitions 1/434 dead transitions. [2023-01-28 10:16:33,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 434 transitions, 7053 flow [2023-01-28 10:16:33,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 10:16:33,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 10:16:33,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2709 transitions. [2023-01-28 10:16:33,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30554928942025716 [2023-01-28 10:16:33,320 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2709 transitions. [2023-01-28 10:16:33,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2709 transitions. [2023-01-28 10:16:33,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:33,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2709 transitions. [2023-01-28 10:16:33,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 208.3846153846154) internal successors, (2709), 13 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:33,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:33,336 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:33,336 INFO L175 Difference]: Start difference. First operand has 219 places, 390 transitions, 5760 flow. Second operand 13 states and 2709 transitions. [2023-01-28 10:16:33,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 434 transitions, 7053 flow [2023-01-28 10:16:33,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 434 transitions, 6822 flow, removed 81 selfloop flow, removed 9 redundant places. [2023-01-28 10:16:33,489 INFO L231 Difference]: Finished difference. Result has 225 places, 397 transitions, 5867 flow [2023-01-28 10:16:33,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=5529, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5867, PETRI_PLACES=225, PETRI_TRANSITIONS=397} [2023-01-28 10:16:33,490 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 193 predicate places. [2023-01-28 10:16:33,490 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 397 transitions, 5867 flow [2023-01-28 10:16:33,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 203.42857142857142) internal successors, (5696), 28 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:33,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:33,490 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] [2023-01-28 10:16:33,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-28 10:16:33,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-28 10:16:33,694 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:16:33,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:33,695 INFO L85 PathProgramCache]: Analyzing trace with hash 395267760, now seen corresponding path program 22 times [2023-01-28 10:16:33,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:33,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688907731] [2023-01-28 10:16:33,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:33,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:34,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:34,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:34,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688907731] [2023-01-28 10:16:34,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688907731] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:34,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058138716] [2023-01-28 10:16:34,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:16:34,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:34,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:34,245 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:16:34,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-28 10:16:34,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:16:34,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:16:34,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 10:16:34,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:34,616 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:34,617 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 35 treesize of output 23 [2023-01-28 10:16:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:34,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:34,778 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:34,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 87 [2023-01-28 10:16:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:34,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058138716] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:34,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:34,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-01-28 10:16:34,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663495296] [2023-01-28 10:16:34,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:34,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 10:16:34,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:34,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 10:16:34,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-01-28 10:16:34,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 682 [2023-01-28 10:16:34,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 397 transitions, 5867 flow. Second operand has 17 states, 17 states have (on average 238.35294117647058) internal successors, (4052), 17 states have internal predecessors, (4052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:34,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:34,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 682 [2023-01-28 10:16:34,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:36,228 INFO L130 PetriNetUnfolder]: 3895/5691 cut-off events. [2023-01-28 10:16:36,228 INFO L131 PetriNetUnfolder]: For 64200/64200 co-relation queries the response was YES. [2023-01-28 10:16:36,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37442 conditions, 5691 events. 3895/5691 cut-off events. For 64200/64200 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 28473 event pairs, 1290 based on Foata normal form. 1/5692 useless extension candidates. Maximal degree in co-relation 37311. Up to 5472 conditions per place. [2023-01-28 10:16:36,288 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 382 selfloop transitions, 59 changer transitions 1/442 dead transitions. [2023-01-28 10:16:36,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 442 transitions, 7150 flow [2023-01-28 10:16:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 10:16:36,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 10:16:36,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2210 transitions. [2023-01-28 10:16:36,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3600521342456826 [2023-01-28 10:16:36,293 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2210 transitions. [2023-01-28 10:16:36,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2210 transitions. [2023-01-28 10:16:36,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:36,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2210 transitions. [2023-01-28 10:16:36,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 245.55555555555554) internal successors, (2210), 9 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:36,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:36,297 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:36,297 INFO L175 Difference]: Start difference. First operand has 225 places, 397 transitions, 5867 flow. Second operand 9 states and 2210 transitions. [2023-01-28 10:16:36,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 442 transitions, 7150 flow [2023-01-28 10:16:36,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 442 transitions, 6916 flow, removed 57 selfloop flow, removed 9 redundant places. [2023-01-28 10:16:36,480 INFO L231 Difference]: Finished difference. Result has 226 places, 403 transitions, 5910 flow [2023-01-28 10:16:36,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=5633, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5910, PETRI_PLACES=226, PETRI_TRANSITIONS=403} [2023-01-28 10:16:36,480 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 194 predicate places. [2023-01-28 10:16:36,480 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 403 transitions, 5910 flow [2023-01-28 10:16:36,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 238.35294117647058) internal successors, (4052), 17 states have internal predecessors, (4052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:36,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:36,481 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] [2023-01-28 10:16:36,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-28 10:16:36,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-28 10:16:36,689 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:16:36,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:36,689 INFO L85 PathProgramCache]: Analyzing trace with hash 2138698910, now seen corresponding path program 23 times [2023-01-28 10:16:36,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:36,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937704193] [2023-01-28 10:16:36,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:36,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:37,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:37,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937704193] [2023-01-28 10:16:37,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937704193] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:37,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124612466] [2023-01-28 10:16:37,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:16:37,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:37,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:37,284 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:16:37,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-28 10:16:37,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:16:37,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:16:37,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 10:16:37,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:37,768 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:16:37,771 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:37,771 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 35 treesize of output 23 [2023-01-28 10:16:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:37,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:37,891 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:37,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 95 [2023-01-28 10:16:38,013 INFO L321 Elim1Store]: treesize reduction 65, result has 23.5 percent of original size [2023-01-28 10:16:38,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 30 [2023-01-28 10:16:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:38,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124612466] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:38,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:38,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-01-28 10:16:38,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359395136] [2023-01-28 10:16:38,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:38,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 10:16:38,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:38,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 10:16:38,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-01-28 10:16:38,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 682 [2023-01-28 10:16:38,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 403 transitions, 5910 flow. Second operand has 17 states, 17 states have (on average 238.2941176470588) internal successors, (4051), 17 states have internal predecessors, (4051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:38,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:38,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 682 [2023-01-28 10:16:38,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:39,357 INFO L130 PetriNetUnfolder]: 3995/5838 cut-off events. [2023-01-28 10:16:39,358 INFO L131 PetriNetUnfolder]: For 68266/68266 co-relation queries the response was YES. [2023-01-28 10:16:39,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38297 conditions, 5838 events. 3995/5838 cut-off events. For 68266/68266 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 29402 event pairs, 1350 based on Foata normal form. 1/5839 useless extension candidates. Maximal degree in co-relation 38169. Up to 5659 conditions per place. [2023-01-28 10:16:39,402 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 391 selfloop transitions, 51 changer transitions 1/443 dead transitions. [2023-01-28 10:16:39,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 443 transitions, 7163 flow [2023-01-28 10:16:39,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 10:16:39,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 10:16:39,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2200 transitions. [2023-01-28 10:16:39,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35842293906810035 [2023-01-28 10:16:39,404 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2200 transitions. [2023-01-28 10:16:39,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2200 transitions. [2023-01-28 10:16:39,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:39,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2200 transitions. [2023-01-28 10:16:39,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 244.44444444444446) internal successors, (2200), 9 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:39,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:39,408 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:39,408 INFO L175 Difference]: Start difference. First operand has 226 places, 403 transitions, 5910 flow. Second operand 9 states and 2200 transitions. [2023-01-28 10:16:39,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 443 transitions, 7163 flow [2023-01-28 10:16:39,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 443 transitions, 6945 flow, removed 53 selfloop flow, removed 6 redundant places. [2023-01-28 10:16:39,558 INFO L231 Difference]: Finished difference. Result has 232 places, 413 transitions, 6027 flow [2023-01-28 10:16:39,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=5694, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6027, PETRI_PLACES=232, PETRI_TRANSITIONS=413} [2023-01-28 10:16:39,559 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 200 predicate places. [2023-01-28 10:16:39,559 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 413 transitions, 6027 flow [2023-01-28 10:16:39,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 238.2941176470588) internal successors, (4051), 17 states have internal predecessors, (4051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:39,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:39,560 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] [2023-01-28 10:16:39,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-28 10:16:39,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:39,765 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:16:39,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:39,765 INFO L85 PathProgramCache]: Analyzing trace with hash 549899712, now seen corresponding path program 24 times [2023-01-28 10:16:39,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:39,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595021999] [2023-01-28 10:16:39,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:39,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:40,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:40,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595021999] [2023-01-28 10:16:40,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595021999] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:40,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966323104] [2023-01-28 10:16:40,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:16:40,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:40,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:40,260 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:16:40,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-28 10:16:40,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 10:16:40,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:16:40,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 10:16:40,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:40,701 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:16:40,704 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:40,704 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 28 treesize of output 20 [2023-01-28 10:16:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:40,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:40,827 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:40,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 95 [2023-01-28 10:16:41,021 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-01-28 10:16:41,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 38 [2023-01-28 10:16:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:41,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966323104] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:41,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:41,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-01-28 10:16:41,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406589621] [2023-01-28 10:16:41,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:41,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 10:16:41,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:41,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 10:16:41,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-01-28 10:16:41,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 682 [2023-01-28 10:16:41,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 413 transitions, 6027 flow. Second operand has 17 states, 17 states have (on average 238.2941176470588) internal successors, (4051), 17 states have internal predecessors, (4051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:41,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:41,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 682 [2023-01-28 10:16:41,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:42,298 INFO L130 PetriNetUnfolder]: 4095/5985 cut-off events. [2023-01-28 10:16:42,298 INFO L131 PetriNetUnfolder]: For 71901/71901 co-relation queries the response was YES. [2023-01-28 10:16:42,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39240 conditions, 5985 events. 4095/5985 cut-off events. For 71901/71901 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 30299 event pairs, 1390 based on Foata normal form. 1/5986 useless extension candidates. Maximal degree in co-relation 39108. Up to 5806 conditions per place. [2023-01-28 10:16:42,360 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 403 selfloop transitions, 51 changer transitions 1/455 dead transitions. [2023-01-28 10:16:42,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 455 transitions, 7354 flow [2023-01-28 10:16:42,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 10:16:42,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 10:16:42,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2202 transitions. [2023-01-28 10:16:42,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3587487781036168 [2023-01-28 10:16:42,362 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2202 transitions. [2023-01-28 10:16:42,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2202 transitions. [2023-01-28 10:16:42,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:42,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2202 transitions. [2023-01-28 10:16:42,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 244.66666666666666) internal successors, (2202), 9 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:42,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:42,366 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:42,366 INFO L175 Difference]: Start difference. First operand has 232 places, 413 transitions, 6027 flow. Second operand 9 states and 2202 transitions. [2023-01-28 10:16:42,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 455 transitions, 7354 flow [2023-01-28 10:16:42,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 455 transitions, 7146 flow, removed 59 selfloop flow, removed 4 redundant places. [2023-01-28 10:16:42,553 INFO L231 Difference]: Finished difference. Result has 240 places, 423 transitions, 6179 flow [2023-01-28 10:16:42,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=5821, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6179, PETRI_PLACES=240, PETRI_TRANSITIONS=423} [2023-01-28 10:16:42,554 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 208 predicate places. [2023-01-28 10:16:42,554 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 423 transitions, 6179 flow [2023-01-28 10:16:42,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 238.2941176470588) internal successors, (4051), 17 states have internal predecessors, (4051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:42,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:42,555 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] [2023-01-28 10:16:42,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-28 10:16:42,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:42,760 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:16:42,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:42,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1102021878, now seen corresponding path program 25 times [2023-01-28 10:16:42,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:42,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674683636] [2023-01-28 10:16:42,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:42,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:42,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:43,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:43,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674683636] [2023-01-28 10:16:43,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674683636] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:43,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833893029] [2023-01-28 10:16:43,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:16:43,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:43,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:43,473 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:16:43,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-28 10:16:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:43,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-01-28 10:16:43,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:43,692 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-01-28 10:16:43,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-01-28 10:16:43,724 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-01-28 10:16:43,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-01-28 10:16:43,762 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-01-28 10:16:43,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-01-28 10:16:43,964 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:16:43,965 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 10:16:43,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2023-01-28 10:16:44,131 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:16:44,135 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:44,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 29 [2023-01-28 10:16:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:44,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:44,239 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:44,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 215 [2023-01-28 10:16:45,206 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:16:45,207 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:16:45,254 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-01-28 10:16:45,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 65 [2023-01-28 10:16:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:45,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833893029] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:45,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:45,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-01-28 10:16:45,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485843703] [2023-01-28 10:16:45,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:45,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 10:16:45,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:45,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 10:16:45,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-01-28 10:16:45,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 682 [2023-01-28 10:16:45,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 423 transitions, 6179 flow. Second operand has 23 states, 23 states have (on average 223.2608695652174) internal successors, (5135), 23 states have internal predecessors, (5135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:45,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:45,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 682 [2023-01-28 10:16:45,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:47,204 INFO L130 PetriNetUnfolder]: 4193/6128 cut-off events. [2023-01-28 10:16:47,204 INFO L131 PetriNetUnfolder]: For 78265/78265 co-relation queries the response was YES. [2023-01-28 10:16:47,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40367 conditions, 6128 events. 4193/6128 cut-off events. For 78265/78265 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 31195 event pairs, 1419 based on Foata normal form. 1/6129 useless extension candidates. Maximal degree in co-relation 40231. Up to 5953 conditions per place. [2023-01-28 10:16:47,273 INFO L137 encePairwiseOnDemand]: 671/682 looper letters, 407 selfloop transitions, 54 changer transitions 1/462 dead transitions. [2023-01-28 10:16:47,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 462 transitions, 7596 flow [2023-01-28 10:16:47,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 10:16:47,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 10:16:47,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2737 transitions. [2023-01-28 10:16:47,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33443304007820135 [2023-01-28 10:16:47,275 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2737 transitions. [2023-01-28 10:16:47,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2737 transitions. [2023-01-28 10:16:47,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:47,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2737 transitions. [2023-01-28 10:16:47,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 228.08333333333334) internal successors, (2737), 12 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:47,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:47,281 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:47,281 INFO L175 Difference]: Start difference. First operand has 240 places, 423 transitions, 6179 flow. Second operand 12 states and 2737 transitions. [2023-01-28 10:16:47,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 462 transitions, 7596 flow [2023-01-28 10:16:47,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 462 transitions, 7372 flow, removed 68 selfloop flow, removed 4 redundant places. [2023-01-28 10:16:47,490 INFO L231 Difference]: Finished difference. Result has 249 places, 432 transitions, 6381 flow [2023-01-28 10:16:47,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=5955, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6381, PETRI_PLACES=249, PETRI_TRANSITIONS=432} [2023-01-28 10:16:47,491 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 217 predicate places. [2023-01-28 10:16:47,491 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 432 transitions, 6381 flow [2023-01-28 10:16:47,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 223.2608695652174) internal successors, (5135), 23 states have internal predecessors, (5135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:47,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:47,492 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] [2023-01-28 10:16:47,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-28 10:16:47,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:47,697 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:16:47,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:47,697 INFO L85 PathProgramCache]: Analyzing trace with hash 697495096, now seen corresponding path program 26 times [2023-01-28 10:16:47,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:47,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115250271] [2023-01-28 10:16:47,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:47,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:16:48,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:48,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115250271] [2023-01-28 10:16:48,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115250271] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:48,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277113983] [2023-01-28 10:16:48,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:16:48,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:48,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:48,796 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:16:48,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-28 10:16:48,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:16:48,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:16:48,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 94 conjunts are in the unsatisfiable core [2023-01-28 10:16:48,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:49,015 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-01-28 10:16:49,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-01-28 10:16:49,067 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-01-28 10:16:49,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-01-28 10:16:49,120 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:16:49,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-01-28 10:16:49,399 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-01-28 10:16:49,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2023-01-28 10:16:49,500 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:49,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 96 [2023-01-28 10:16:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:49,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:49,919 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:49,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 134 [2023-01-28 10:16:50,072 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:16:50,096 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-01-28 10:16:50,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 38 [2023-01-28 10:16:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:50,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277113983] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:50,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:50,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 31 [2023-01-28 10:16:50,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422450319] [2023-01-28 10:16:50,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:50,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 10:16:50,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:50,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 10:16:50,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 10:16:50,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 682 [2023-01-28 10:16:50,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 432 transitions, 6381 flow. Second operand has 33 states, 33 states have (on average 190.03030303030303) internal successors, (6271), 33 states have internal predecessors, (6271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:50,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:50,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 682 [2023-01-28 10:16:50,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:52,674 INFO L130 PetriNetUnfolder]: 4380/6404 cut-off events. [2023-01-28 10:16:52,674 INFO L131 PetriNetUnfolder]: For 87285/87285 co-relation queries the response was YES. [2023-01-28 10:16:52,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43345 conditions, 6404 events. 4380/6404 cut-off events. For 87285/87285 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 32577 event pairs, 1463 based on Foata normal form. 1/6405 useless extension candidates. Maximal degree in co-relation 42684. Up to 6158 conditions per place. [2023-01-28 10:16:52,748 INFO L137 encePairwiseOnDemand]: 671/682 looper letters, 436 selfloop transitions, 98 changer transitions 1/535 dead transitions. [2023-01-28 10:16:52,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 535 transitions, 9186 flow [2023-01-28 10:16:52,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 10:16:52,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 10:16:52,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3506 transitions. [2023-01-28 10:16:52,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2855979146301727 [2023-01-28 10:16:52,751 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3506 transitions. [2023-01-28 10:16:52,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3506 transitions. [2023-01-28 10:16:52,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:52,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3506 transitions. [2023-01-28 10:16:52,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 194.77777777777777) internal successors, (3506), 18 states have internal predecessors, (3506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:52,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 682.0) internal successors, (12958), 19 states have internal predecessors, (12958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:52,758 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 682.0) internal successors, (12958), 19 states have internal predecessors, (12958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:52,758 INFO L175 Difference]: Start difference. First operand has 249 places, 432 transitions, 6381 flow. Second operand 18 states and 3506 transitions. [2023-01-28 10:16:52,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 535 transitions, 9186 flow [2023-01-28 10:16:53,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 535 transitions, 8807 flow, removed 134 selfloop flow, removed 7 redundant places. [2023-01-28 10:16:53,027 INFO L231 Difference]: Finished difference. Result has 262 places, 482 transitions, 7549 flow [2023-01-28 10:16:53,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=6057, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7549, PETRI_PLACES=262, PETRI_TRANSITIONS=482} [2023-01-28 10:16:53,028 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 230 predicate places. [2023-01-28 10:16:53,028 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 482 transitions, 7549 flow [2023-01-28 10:16:53,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 190.03030303030303) internal successors, (6271), 33 states have internal predecessors, (6271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:53,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:53,029 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] [2023-01-28 10:16:53,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-28 10:16:53,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:53,237 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:16:53,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:53,237 INFO L85 PathProgramCache]: Analyzing trace with hash 2137222784, now seen corresponding path program 27 times [2023-01-28 10:16:53,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:53,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942654473] [2023-01-28 10:16:53,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:53,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:53,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:53,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942654473] [2023-01-28 10:16:53,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942654473] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:53,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916433599] [2023-01-28 10:16:53,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:16:53,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:53,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:53,790 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:16:53,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-28 10:16:53,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:16:53,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:16:53,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 98 conjunts are in the unsatisfiable core [2023-01-28 10:16:53,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:54,006 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-01-28 10:16:54,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-01-28 10:16:54,061 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-01-28 10:16:54,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-01-28 10:16:54,122 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-01-28 10:16:54,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-01-28 10:16:54,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-01-28 10:16:54,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2023-01-28 10:16:54,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:54,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:54,624 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:54,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 215 [2023-01-28 10:16:55,626 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:16:55,626 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:16:55,666 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-01-28 10:16:55,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 65 [2023-01-28 10:16:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:56,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916433599] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:56,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:56,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-01-28 10:16:56,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037260334] [2023-01-28 10:16:56,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:56,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 10:16:56,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:56,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 10:16:56,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2023-01-28 10:16:56,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 682 [2023-01-28 10:16:56,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 482 transitions, 7549 flow. Second operand has 29 states, 29 states have (on average 223.3448275862069) internal successors, (6477), 29 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:56,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:56,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 682 [2023-01-28 10:16:56,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:57,584 INFO L130 PetriNetUnfolder]: 4460/6521 cut-off events. [2023-01-28 10:16:57,584 INFO L131 PetriNetUnfolder]: For 91368/91368 co-relation queries the response was YES. [2023-01-28 10:16:57,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44141 conditions, 6521 events. 4460/6521 cut-off events. For 91368/91368 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 33317 event pairs, 1493 based on Foata normal form. 1/6522 useless extension candidates. Maximal degree in co-relation 43476. Up to 6275 conditions per place. [2023-01-28 10:16:57,656 INFO L137 encePairwiseOnDemand]: 671/682 looper letters, 418 selfloop transitions, 97 changer transitions 1/516 dead transitions. [2023-01-28 10:16:57,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 516 transitions, 9021 flow [2023-01-28 10:16:57,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 10:16:57,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 10:16:57,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2735 transitions. [2023-01-28 10:16:57,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.334188660801564 [2023-01-28 10:16:57,658 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2735 transitions. [2023-01-28 10:16:57,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2735 transitions. [2023-01-28 10:16:57,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:57,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2735 transitions. [2023-01-28 10:16:57,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 227.91666666666666) internal successors, (2735), 12 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:57,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:57,663 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:57,663 INFO L175 Difference]: Start difference. First operand has 262 places, 482 transitions, 7549 flow. Second operand 12 states and 2735 transitions. [2023-01-28 10:16:57,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 516 transitions, 9021 flow [2023-01-28 10:16:58,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 516 transitions, 8680 flow, removed 114 selfloop flow, removed 7 redundant places. [2023-01-28 10:16:58,017 INFO L231 Difference]: Finished difference. Result has 268 places, 488 transitions, 7678 flow [2023-01-28 10:16:58,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=7208, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7678, PETRI_PLACES=268, PETRI_TRANSITIONS=488} [2023-01-28 10:16:58,018 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 236 predicate places. [2023-01-28 10:16:58,018 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 488 transitions, 7678 flow [2023-01-28 10:16:58,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 223.3448275862069) internal successors, (6477), 29 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:58,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:58,019 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] [2023-01-28 10:16:58,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-28 10:16:58,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-01-28 10:16:58,224 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:16:58,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:58,225 INFO L85 PathProgramCache]: Analyzing trace with hash -989489866, now seen corresponding path program 28 times [2023-01-28 10:16:58,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:58,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833229590] [2023-01-28 10:16:58,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:58,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:59,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:16:59,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:59,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833229590] [2023-01-28 10:16:59,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833229590] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:59,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850247685] [2023-01-28 10:16:59,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:16:59,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:59,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:59,133 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:16:59,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-28 10:16:59,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:16:59,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:16:59,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-01-28 10:16:59,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:59,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:16:59,364 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:16:59,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-01-28 10:16:59,578 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-01-28 10:16:59,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-01-28 10:16:59,682 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:59,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 106 [2023-01-28 10:16:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:59,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:59,941 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:59,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 134 [2023-01-28 10:17:00,168 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:17:00,188 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-01-28 10:17:00,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 38 [2023-01-28 10:17:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:00,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850247685] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:17:00,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:17:00,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 27 [2023-01-28 10:17:00,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520959705] [2023-01-28 10:17:00,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:17:00,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 10:17:00,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:17:00,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 10:17:00,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2023-01-28 10:17:00,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 682 [2023-01-28 10:17:00,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 488 transitions, 7678 flow. Second operand has 29 states, 29 states have (on average 204.13793103448276) internal successors, (5920), 29 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:00,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:17:00,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 682 [2023-01-28 10:17:00,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:17:02,186 INFO L130 PetriNetUnfolder]: 4562/6670 cut-off events. [2023-01-28 10:17:02,186 INFO L131 PetriNetUnfolder]: For 98026/98026 co-relation queries the response was YES. [2023-01-28 10:17:02,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45418 conditions, 6670 events. 4562/6670 cut-off events. For 98026/98026 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 34286 event pairs, 1538 based on Foata normal form. 1/6671 useless extension candidates. Maximal degree in co-relation 44750. Up to 6410 conditions per place. [2023-01-28 10:17:02,366 INFO L137 encePairwiseOnDemand]: 670/682 looper letters, 430 selfloop transitions, 98 changer transitions 1/529 dead transitions. [2023-01-28 10:17:02,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 529 transitions, 9292 flow [2023-01-28 10:17:02,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 10:17:02,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 10:17:02,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2714 transitions. [2023-01-28 10:17:02,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30611324159711256 [2023-01-28 10:17:02,369 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2714 transitions. [2023-01-28 10:17:02,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2714 transitions. [2023-01-28 10:17:02,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:17:02,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2714 transitions. [2023-01-28 10:17:02,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 208.76923076923077) internal successors, (2714), 13 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:02,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:02,375 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:02,375 INFO L175 Difference]: Start difference. First operand has 268 places, 488 transitions, 7678 flow. Second operand 13 states and 2714 transitions. [2023-01-28 10:17:02,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 529 transitions, 9292 flow [2023-01-28 10:17:02,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 529 transitions, 8942 flow, removed 118 selfloop flow, removed 8 redundant places. [2023-01-28 10:17:02,649 INFO L231 Difference]: Finished difference. Result has 275 places, 497 transitions, 7899 flow [2023-01-28 10:17:02,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=7328, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7899, PETRI_PLACES=275, PETRI_TRANSITIONS=497} [2023-01-28 10:17:02,649 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 243 predicate places. [2023-01-28 10:17:02,649 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 497 transitions, 7899 flow [2023-01-28 10:17:02,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 204.13793103448276) internal successors, (5920), 29 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:02,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:17:02,650 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] [2023-01-28 10:17:02,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-01-28 10:17:02,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:17:02,855 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:17:02,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:17:02,856 INFO L85 PathProgramCache]: Analyzing trace with hash -789300812, now seen corresponding path program 29 times [2023-01-28 10:17:02,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:17:02,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268654487] [2023-01-28 10:17:02,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:17:02,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:17:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:17:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:17:03,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:17:03,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268654487] [2023-01-28 10:17:03,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268654487] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:17:03,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436665463] [2023-01-28 10:17:03,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:17:03,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:17:03,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:17:03,901 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:17:03,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-28 10:17:04,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:17:04,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:17:04,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 10:17:04,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:17:04,381 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:17:04,381 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 35 treesize of output 23 [2023-01-28 10:17:04,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:04,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:17:04,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:17:04,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 95 [2023-01-28 10:17:04,590 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-01-28 10:17:04,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 38 [2023-01-28 10:17:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:04,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436665463] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:17:04,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:17:04,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 6] total 27 [2023-01-28 10:17:04,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584763388] [2023-01-28 10:17:04,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:17:04,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 10:17:04,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:17:04,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 10:17:04,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2023-01-28 10:17:04,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 682 [2023-01-28 10:17:04,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 497 transitions, 7899 flow. Second operand has 29 states, 29 states have (on average 192.55172413793105) internal successors, (5584), 29 states have internal predecessors, (5584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:04,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:17:04,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 682 [2023-01-28 10:17:04,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:17:06,803 INFO L130 PetriNetUnfolder]: 4652/6803 cut-off events. [2023-01-28 10:17:06,803 INFO L131 PetriNetUnfolder]: For 100199/100199 co-relation queries the response was YES. [2023-01-28 10:17:06,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46254 conditions, 6803 events. 4652/6803 cut-off events. For 100199/100199 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 35130 event pairs, 1577 based on Foata normal form. 1/6804 useless extension candidates. Maximal degree in co-relation 45582. Up to 6539 conditions per place. [2023-01-28 10:17:06,866 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 465 selfloop transitions, 96 changer transitions 1/562 dead transitions. [2023-01-28 10:17:06,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 562 transitions, 9649 flow [2023-01-28 10:17:06,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 10:17:06,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 10:17:06,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3168 transitions. [2023-01-28 10:17:06,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2903225806451613 [2023-01-28 10:17:06,868 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3168 transitions. [2023-01-28 10:17:06,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3168 transitions. [2023-01-28 10:17:06,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:17:06,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3168 transitions. [2023-01-28 10:17:06,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:06,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 682.0) internal successors, (11594), 17 states have internal predecessors, (11594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:06,875 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 682.0) internal successors, (11594), 17 states have internal predecessors, (11594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:06,875 INFO L175 Difference]: Start difference. First operand has 275 places, 497 transitions, 7899 flow. Second operand 16 states and 3168 transitions. [2023-01-28 10:17:06,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 562 transitions, 9649 flow [2023-01-28 10:17:07,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 562 transitions, 9290 flow, removed 123 selfloop flow, removed 8 redundant places. [2023-01-28 10:17:07,119 INFO L231 Difference]: Finished difference. Result has 284 places, 503 transitions, 7941 flow [2023-01-28 10:17:07,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=7542, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7941, PETRI_PLACES=284, PETRI_TRANSITIONS=503} [2023-01-28 10:17:07,120 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 252 predicate places. [2023-01-28 10:17:07,120 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 503 transitions, 7941 flow [2023-01-28 10:17:07,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 192.55172413793105) internal successors, (5584), 29 states have internal predecessors, (5584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:07,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:17:07,120 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] [2023-01-28 10:17:07,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-01-28 10:17:07,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:17:07,326 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:17:07,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:17:07,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1005614046, now seen corresponding path program 30 times [2023-01-28 10:17:07,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:17:07,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953796159] [2023-01-28 10:17:07,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:17:07,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:17:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:17:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:17:08,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:17:08,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953796159] [2023-01-28 10:17:08,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953796159] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:17:08,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862716423] [2023-01-28 10:17:08,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:17:08,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:17:08,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:17:08,218 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:17:08,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-28 10:17:08,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 10:17:08,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:17:08,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-01-28 10:17:08,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:17:08,465 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-01-28 10:17:08,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-01-28 10:17:08,507 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-01-28 10:17:08,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-01-28 10:17:08,557 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-01-28 10:17:08,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-01-28 10:17:08,672 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 10:17:08,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2023-01-28 10:17:08,798 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:17:08,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2023-01-28 10:17:08,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:08,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:17:08,928 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:17:08,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 191 [2023-01-28 10:17:09,565 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:17:09,565 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:17:09,606 INFO L321 Elim1Store]: treesize reduction 26, result has 66.2 percent of original size [2023-01-28 10:17:09,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 61 [2023-01-28 10:17:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:10,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862716423] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:17:10,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:17:10,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2023-01-28 10:17:10,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651015753] [2023-01-28 10:17:10,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:17:10,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 10:17:10,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:17:10,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 10:17:10,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2023-01-28 10:17:10,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 682 [2023-01-28 10:17:10,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 503 transitions, 7941 flow. Second operand has 31 states, 31 states have (on average 204.06451612903226) internal successors, (6326), 31 states have internal predecessors, (6326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:10,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:17:10,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 682 [2023-01-28 10:17:10,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:17:11,823 INFO L130 PetriNetUnfolder]: 4770/6974 cut-off events. [2023-01-28 10:17:11,823 INFO L131 PetriNetUnfolder]: For 108164/108164 co-relation queries the response was YES. [2023-01-28 10:17:11,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47629 conditions, 6974 events. 4770/6974 cut-off events. For 108164/108164 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 36196 event pairs, 1609 based on Foata normal form. 1/6975 useless extension candidates. Maximal degree in co-relation 46954. Up to 6690 conditions per place. [2023-01-28 10:17:11,894 INFO L137 encePairwiseOnDemand]: 670/682 looper letters, 441 selfloop transitions, 103 changer transitions 1/545 dead transitions. [2023-01-28 10:17:11,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 545 transitions, 9669 flow [2023-01-28 10:17:11,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 10:17:11,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 10:17:11,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2712 transitions. [2023-01-28 10:17:11,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3058876607263704 [2023-01-28 10:17:11,896 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2712 transitions. [2023-01-28 10:17:11,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2712 transitions. [2023-01-28 10:17:11,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:17:11,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2712 transitions. [2023-01-28 10:17:11,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 208.6153846153846) internal successors, (2712), 13 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:11,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:11,901 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:11,901 INFO L175 Difference]: Start difference. First operand has 284 places, 503 transitions, 7941 flow. Second operand 13 states and 2712 transitions. [2023-01-28 10:17:11,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 545 transitions, 9669 flow [2023-01-28 10:17:12,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 545 transitions, 9369 flow, removed 77 selfloop flow, removed 10 redundant places. [2023-01-28 10:17:12,185 INFO L231 Difference]: Finished difference. Result has 288 places, 516 transitions, 8344 flow [2023-01-28 10:17:12,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=7641, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8344, PETRI_PLACES=288, PETRI_TRANSITIONS=516} [2023-01-28 10:17:12,185 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 256 predicate places. [2023-01-28 10:17:12,185 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 516 transitions, 8344 flow [2023-01-28 10:17:12,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 204.06451612903226) internal successors, (6326), 31 states have internal predecessors, (6326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:12,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:17:12,186 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] [2023-01-28 10:17:12,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-01-28 10:17:12,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-01-28 10:17:12,391 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:17:12,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:17:12,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1507910754, now seen corresponding path program 31 times [2023-01-28 10:17:12,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:17:12,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841193782] [2023-01-28 10:17:12,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:17:12,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:17:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:17:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:17:13,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:17:13,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841193782] [2023-01-28 10:17:13,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841193782] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:17:13,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243759716] [2023-01-28 10:17:13,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:17:13,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:17:13,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:17:13,238 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:17:13,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-28 10:17:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:17:13,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-01-28 10:17:13,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:17:13,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:17:13,479 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:17:13,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-01-28 10:17:13,648 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-01-28 10:17:13,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-01-28 10:17:13,868 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:17:13,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 106 [2023-01-28 10:17:13,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:13,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:17:14,342 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:17:14,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 118 [2023-01-28 10:17:14,574 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:17:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:14,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243759716] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:17:14,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:17:14,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 27 [2023-01-28 10:17:14,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136966336] [2023-01-28 10:17:14,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:17:14,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 10:17:14,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:17:14,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 10:17:14,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2023-01-28 10:17:14,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 682 [2023-01-28 10:17:14,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 516 transitions, 8344 flow. Second operand has 29 states, 29 states have (on average 194.13793103448276) internal successors, (5630), 29 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:14,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:17:14,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 682 [2023-01-28 10:17:14,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:17:17,261 INFO L130 PetriNetUnfolder]: 5125/7492 cut-off events. [2023-01-28 10:17:17,262 INFO L131 PetriNetUnfolder]: For 128555/128555 co-relation queries the response was YES. [2023-01-28 10:17:17,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54533 conditions, 7492 events. 5125/7492 cut-off events. For 128555/128555 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 39158 event pairs, 1632 based on Foata normal form. 1/7493 useless extension candidates. Maximal degree in co-relation 53856. Up to 6926 conditions per place. [2023-01-28 10:17:17,348 INFO L137 encePairwiseOnDemand]: 668/682 looper letters, 498 selfloop transitions, 210 changer transitions 1/709 dead transitions. [2023-01-28 10:17:17,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 709 transitions, 13405 flow [2023-01-28 10:17:17,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 10:17:17,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 10:17:17,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 5368 transitions. [2023-01-28 10:17:17,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2915173237753883 [2023-01-28 10:17:17,352 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 5368 transitions. [2023-01-28 10:17:17,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 5368 transitions. [2023-01-28 10:17:17,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:17:17,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 5368 transitions. [2023-01-28 10:17:17,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 198.8148148148148) internal successors, (5368), 27 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:17,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 682.0) internal successors, (19096), 28 states have internal predecessors, (19096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:17,362 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 682.0) internal successors, (19096), 28 states have internal predecessors, (19096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:17,363 INFO L175 Difference]: Start difference. First operand has 288 places, 516 transitions, 8344 flow. Second operand 27 states and 5368 transitions. [2023-01-28 10:17:17,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 709 transitions, 13405 flow [2023-01-28 10:17:17,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 709 transitions, 12868 flow, removed 208 selfloop flow, removed 6 redundant places. [2023-01-28 10:17:17,714 INFO L231 Difference]: Finished difference. Result has 314 places, 618 transitions, 11219 flow [2023-01-28 10:17:17,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=7867, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11219, PETRI_PLACES=314, PETRI_TRANSITIONS=618} [2023-01-28 10:17:17,715 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 282 predicate places. [2023-01-28 10:17:17,715 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 618 transitions, 11219 flow [2023-01-28 10:17:17,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 194.13793103448276) internal successors, (5630), 29 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:17,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:17:17,715 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] [2023-01-28 10:17:17,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-01-28 10:17:17,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-01-28 10:17:17,917 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:17:17,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:17:17,917 INFO L85 PathProgramCache]: Analyzing trace with hash 969360588, now seen corresponding path program 32 times [2023-01-28 10:17:17,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:17:17,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696105068] [2023-01-28 10:17:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:17:17,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:17:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:17:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:17:18,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:17:18,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696105068] [2023-01-28 10:17:18,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696105068] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:17:18,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995048090] [2023-01-28 10:17:18,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:17:18,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:17:18,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:17:18,662 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:17:18,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-01-28 10:17:18,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:17:18,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:17:18,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-01-28 10:17:18,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:17:18,876 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-01-28 10:17:18,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-01-28 10:17:18,921 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-01-28 10:17:18,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-01-28 10:17:18,967 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-01-28 10:17:18,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-01-28 10:17:19,090 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 10:17:19,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2023-01-28 10:17:19,245 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:17:19,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2023-01-28 10:17:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:19,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:17:19,383 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:17:19,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 191 [2023-01-28 10:17:20,375 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:17:20,376 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:17:20,421 INFO L321 Elim1Store]: treesize reduction 26, result has 66.2 percent of original size [2023-01-28 10:17:20,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 61 [2023-01-28 10:17:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:20,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995048090] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:17:20,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:17:20,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2023-01-28 10:17:20,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829716192] [2023-01-28 10:17:20,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:17:20,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 10:17:20,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:17:20,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 10:17:20,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2023-01-28 10:17:20,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 682 [2023-01-28 10:17:20,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 618 transitions, 11219 flow. Second operand has 28 states, 28 states have (on average 199.14285714285714) internal successors, (5576), 28 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:20,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:17:20,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 682 [2023-01-28 10:17:20,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:17:22,999 INFO L130 PetriNetUnfolder]: 5480/8009 cut-off events. [2023-01-28 10:17:22,999 INFO L131 PetriNetUnfolder]: For 149951/149951 co-relation queries the response was YES. [2023-01-28 10:17:23,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61688 conditions, 8009 events. 5480/8009 cut-off events. For 149951/149951 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 42138 event pairs, 1698 based on Foata normal form. 1/8010 useless extension candidates. Maximal degree in co-relation 61004. Up to 7300 conditions per place. [2023-01-28 10:17:23,088 INFO L137 encePairwiseOnDemand]: 668/682 looper letters, 471 selfloop transitions, 294 changer transitions 1/766 dead transitions. [2023-01-28 10:17:23,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 766 transitions, 16199 flow [2023-01-28 10:17:23,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 10:17:23,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 10:17:23,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4261 transitions. [2023-01-28 10:17:23,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2975143136433459 [2023-01-28 10:17:23,092 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4261 transitions. [2023-01-28 10:17:23,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4261 transitions. [2023-01-28 10:17:23,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:17:23,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4261 transitions. [2023-01-28 10:17:23,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 202.9047619047619) internal successors, (4261), 21 states have internal predecessors, (4261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:23,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 682.0) internal successors, (15004), 22 states have internal predecessors, (15004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:23,100 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 682.0) internal successors, (15004), 22 states have internal predecessors, (15004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:23,101 INFO L175 Difference]: Start difference. First operand has 314 places, 618 transitions, 11219 flow. Second operand 21 states and 4261 transitions. [2023-01-28 10:17:23,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 766 transitions, 16199 flow [2023-01-28 10:17:23,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 766 transitions, 15381 flow, removed 207 selfloop flow, removed 6 redundant places. [2023-01-28 10:17:23,546 INFO L231 Difference]: Finished difference. Result has 332 places, 715 transitions, 14089 flow [2023-01-28 10:17:23,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=10534, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=14089, PETRI_PLACES=332, PETRI_TRANSITIONS=715} [2023-01-28 10:17:23,547 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 300 predicate places. [2023-01-28 10:17:23,547 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 715 transitions, 14089 flow [2023-01-28 10:17:23,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 199.14285714285714) internal successors, (5576), 28 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:23,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:17:23,547 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] [2023-01-28 10:17:23,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-01-28 10:17:23,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-28 10:17:23,753 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:17:23,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:17:23,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1329023202, now seen corresponding path program 33 times [2023-01-28 10:17:23,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:17:23,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128846447] [2023-01-28 10:17:23,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:17:23,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:17:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:17:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:17:24,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:17:24,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128846447] [2023-01-28 10:17:24,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128846447] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:17:24,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584489734] [2023-01-28 10:17:24,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:17:24,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:17:24,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:17:24,620 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:17:24,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-01-28 10:17:24,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 10:17:24,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:17:24,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 93 conjunts are in the unsatisfiable core [2023-01-28 10:17:24,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:17:24,884 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-01-28 10:17:24,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-01-28 10:17:24,931 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-01-28 10:17:24,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-01-28 10:17:24,986 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-01-28 10:17:24,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-01-28 10:17:25,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-01-28 10:17:25,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2023-01-28 10:17:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:25,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:17:25,615 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:17:25,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 191 [2023-01-28 10:17:26,580 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:17:26,580 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:17:26,619 INFO L321 Elim1Store]: treesize reduction 26, result has 66.2 percent of original size [2023-01-28 10:17:26,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 61 [2023-01-28 10:17:27,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:27,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584489734] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:17:27,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:17:27,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2023-01-28 10:17:27,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761271566] [2023-01-28 10:17:27,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:17:27,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 10:17:27,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:17:27,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 10:17:27,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2023-01-28 10:17:27,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 682 [2023-01-28 10:17:27,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 715 transitions, 14089 flow. Second operand has 32 states, 32 states have (on average 199.125) internal successors, (6372), 32 states have internal predecessors, (6372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:27,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:17:27,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 682 [2023-01-28 10:17:27,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:17:29,621 INFO L130 PetriNetUnfolder]: 5560/8126 cut-off events. [2023-01-28 10:17:29,621 INFO L131 PetriNetUnfolder]: For 149311/149311 co-relation queries the response was YES. [2023-01-28 10:17:29,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62298 conditions, 8126 events. 5560/8126 cut-off events. For 149311/149311 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 42960 event pairs, 1779 based on Foata normal form. 1/8127 useless extension candidates. Maximal degree in co-relation 61609. Up to 7523 conditions per place. [2023-01-28 10:17:29,735 INFO L137 encePairwiseOnDemand]: 668/682 looper letters, 481 selfloop transitions, 285 changer transitions 1/767 dead transitions. [2023-01-28 10:17:29,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 767 transitions, 16305 flow [2023-01-28 10:17:29,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 10:17:29,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 10:17:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4255 transitions. [2023-01-28 10:17:29,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.297095377740539 [2023-01-28 10:17:29,738 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4255 transitions. [2023-01-28 10:17:29,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4255 transitions. [2023-01-28 10:17:29,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:17:29,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4255 transitions. [2023-01-28 10:17:29,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 202.61904761904762) internal successors, (4255), 21 states have internal predecessors, (4255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:29,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 682.0) internal successors, (15004), 22 states have internal predecessors, (15004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:29,746 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 682.0) internal successors, (15004), 22 states have internal predecessors, (15004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:29,746 INFO L175 Difference]: Start difference. First operand has 332 places, 715 transitions, 14089 flow. Second operand 21 states and 4255 transitions. [2023-01-28 10:17:29,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 767 transitions, 16305 flow [2023-01-28 10:17:30,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 767 transitions, 15817 flow, removed 212 selfloop flow, removed 8 redundant places. [2023-01-28 10:17:30,249 INFO L231 Difference]: Finished difference. Result has 346 places, 721 transitions, 14509 flow [2023-01-28 10:17:30,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=13601, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=14509, PETRI_PLACES=346, PETRI_TRANSITIONS=721} [2023-01-28 10:17:30,250 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 314 predicate places. [2023-01-28 10:17:30,250 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 721 transitions, 14509 flow [2023-01-28 10:17:30,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 199.125) internal successors, (6372), 32 states have internal predecessors, (6372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:30,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:17:30,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:17:30,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-01-28 10:17:30,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-28 10:17:30,456 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:17:30,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:17:30,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1473552728, now seen corresponding path program 34 times [2023-01-28 10:17:30,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:17:30,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835751551] [2023-01-28 10:17:30,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:17:30,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:17:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:17:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:31,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:17:31,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835751551] [2023-01-28 10:17:31,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835751551] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:17:31,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551332757] [2023-01-28 10:17:31,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:17:31,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:17:31,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:17:31,064 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:17:31,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-01-28 10:17:31,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:17:31,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:17:31,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 93 conjunts are in the unsatisfiable core [2023-01-28 10:17:31,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:17:31,278 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-01-28 10:17:31,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-01-28 10:17:31,308 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-01-28 10:17:31,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-01-28 10:17:31,363 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-01-28 10:17:31,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-01-28 10:17:31,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-01-28 10:17:31,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2023-01-28 10:17:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:31,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:17:31,888 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:17:31,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 215 [2023-01-28 10:17:32,654 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:17:32,655 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:17:32,698 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-01-28 10:17:32,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 65 [2023-01-28 10:17:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:33,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551332757] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:17:33,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:17:33,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-01-28 10:17:33,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935693739] [2023-01-28 10:17:33,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:17:33,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 10:17:33,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:17:33,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 10:17:33,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2023-01-28 10:17:33,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 682 [2023-01-28 10:17:33,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 721 transitions, 14509 flow. Second operand has 29 states, 29 states have (on average 223.27586206896552) internal successors, (6475), 29 states have internal predecessors, (6475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:33,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:17:33,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 682 [2023-01-28 10:17:33,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:17:35,211 INFO L130 PetriNetUnfolder]: 5650/8257 cut-off events. [2023-01-28 10:17:35,211 INFO L131 PetriNetUnfolder]: For 148722/148722 co-relation queries the response was YES. [2023-01-28 10:17:35,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63018 conditions, 8257 events. 5650/8257 cut-off events. For 148722/148722 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 43717 event pairs, 1821 based on Foata normal form. 1/8258 useless extension candidates. Maximal degree in co-relation 62326. Up to 7706 conditions per place. [2023-01-28 10:17:35,317 INFO L137 encePairwiseOnDemand]: 671/682 looper letters, 485 selfloop transitions, 270 changer transitions 1/756 dead transitions. [2023-01-28 10:17:35,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 756 transitions, 16545 flow [2023-01-28 10:17:35,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 10:17:35,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 10:17:35,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2733 transitions. [2023-01-28 10:17:35,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33394428152492667 [2023-01-28 10:17:35,319 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2733 transitions. [2023-01-28 10:17:35,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2733 transitions. [2023-01-28 10:17:35,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:17:35,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2733 transitions. [2023-01-28 10:17:35,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 227.75) internal successors, (2733), 12 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:35,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:35,324 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:35,324 INFO L175 Difference]: Start difference. First operand has 346 places, 721 transitions, 14509 flow. Second operand 12 states and 2733 transitions. [2023-01-28 10:17:35,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 756 transitions, 16545 flow [2023-01-28 10:17:35,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 756 transitions, 16014 flow, removed 149 selfloop flow, removed 15 redundant places. [2023-01-28 10:17:35,905 INFO L231 Difference]: Finished difference. Result has 345 places, 730 transitions, 14918 flow [2023-01-28 10:17:35,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=13981, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14918, PETRI_PLACES=345, PETRI_TRANSITIONS=730} [2023-01-28 10:17:35,906 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 313 predicate places. [2023-01-28 10:17:35,906 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 730 transitions, 14918 flow [2023-01-28 10:17:35,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 223.27586206896552) internal successors, (6475), 29 states have internal predecessors, (6475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:35,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:17:35,907 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] [2023-01-28 10:17:35,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-01-28 10:17:36,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:17:36,112 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:17:36,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:17:36,112 INFO L85 PathProgramCache]: Analyzing trace with hash -2008673002, now seen corresponding path program 35 times [2023-01-28 10:17:36,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:17:36,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568668153] [2023-01-28 10:17:36,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:17:36,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:17:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:17:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:17:37,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:17:37,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568668153] [2023-01-28 10:17:37,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568668153] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:17:37,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169332514] [2023-01-28 10:17:37,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:17:37,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:17:37,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:17:37,235 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:17:37,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-01-28 10:17:37,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 10:17:37,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:17:37,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 85 conjunts are in the unsatisfiable core [2023-01-28 10:17:37,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:17:37,458 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-01-28 10:17:37,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-01-28 10:17:37,498 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-01-28 10:17:37,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-01-28 10:17:37,542 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:17:37,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-01-28 10:17:37,779 INFO L321 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2023-01-28 10:17:37,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2023-01-28 10:17:37,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2023-01-28 10:17:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:37,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:17:38,209 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:17:38,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 134 [2023-01-28 10:17:38,300 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:17:38,319 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-01-28 10:17:38,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 38 [2023-01-28 10:17:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:38,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169332514] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:17:38,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:17:38,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 32 [2023-01-28 10:17:38,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763749432] [2023-01-28 10:17:38,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:17:38,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 10:17:38,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:17:38,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 10:17:38,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2023-01-28 10:17:38,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 682 [2023-01-28 10:17:38,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 730 transitions, 14918 flow. Second operand has 34 states, 34 states have (on average 195.0) internal successors, (6630), 34 states have internal predecessors, (6630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:38,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:17:38,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 682 [2023-01-28 10:17:38,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:17:41,246 INFO L130 PetriNetUnfolder]: 5740/8388 cut-off events. [2023-01-28 10:17:41,246 INFO L131 PetriNetUnfolder]: For 154558/154558 co-relation queries the response was YES. [2023-01-28 10:17:41,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64417 conditions, 8388 events. 5740/8388 cut-off events. For 154558/154558 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 44665 event pairs, 1856 based on Foata normal form. 1/8389 useless extension candidates. Maximal degree in co-relation 63721. Up to 7829 conditions per place. [2023-01-28 10:17:41,356 INFO L137 encePairwiseOnDemand]: 671/682 looper letters, 515 selfloop transitions, 271 changer transitions 1/787 dead transitions. [2023-01-28 10:17:41,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 787 transitions, 17201 flow [2023-01-28 10:17:41,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 10:17:41,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 10:17:41,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3790 transitions. [2023-01-28 10:17:41,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29248340793332306 [2023-01-28 10:17:41,361 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3790 transitions. [2023-01-28 10:17:41,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3790 transitions. [2023-01-28 10:17:41,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:17:41,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3790 transitions. [2023-01-28 10:17:41,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 199.47368421052633) internal successors, (3790), 19 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:41,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 682.0) internal successors, (13640), 20 states have internal predecessors, (13640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:41,369 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 682.0) internal successors, (13640), 20 states have internal predecessors, (13640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:41,369 INFO L175 Difference]: Start difference. First operand has 345 places, 730 transitions, 14918 flow. Second operand 19 states and 3790 transitions. [2023-01-28 10:17:41,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 787 transitions, 17201 flow [2023-01-28 10:17:42,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 787 transitions, 16648 flow, removed 159 selfloop flow, removed 5 redundant places. [2023-01-28 10:17:42,019 INFO L231 Difference]: Finished difference. Result has 360 places, 739 transitions, 15302 flow [2023-01-28 10:17:42,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=14365, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=15302, PETRI_PLACES=360, PETRI_TRANSITIONS=739} [2023-01-28 10:17:42,020 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 328 predicate places. [2023-01-28 10:17:42,020 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 739 transitions, 15302 flow [2023-01-28 10:17:42,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 195.0) internal successors, (6630), 34 states have internal predecessors, (6630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:42,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:17:42,021 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] [2023-01-28 10:17:42,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-01-28 10:17:42,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-01-28 10:17:42,226 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:17:42,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:17:42,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1248228834, now seen corresponding path program 36 times [2023-01-28 10:17:42,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:17:42,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204735665] [2023-01-28 10:17:42,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:17:42,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:17:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:17:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:42,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:17:42,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204735665] [2023-01-28 10:17:42,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204735665] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:17:42,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030528266] [2023-01-28 10:17:42,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:17:42,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:17:42,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:17:42,878 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:17:42,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-01-28 10:17:43,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 10:17:43,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:17:43,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-01-28 10:17:43,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:17:43,129 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-01-28 10:17:43,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-01-28 10:17:43,163 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-01-28 10:17:43,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-01-28 10:17:43,198 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-01-28 10:17:43,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-01-28 10:17:43,369 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 10:17:43,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2023-01-28 10:17:43,557 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:17:43,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2023-01-28 10:17:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:43,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:17:43,676 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:17:43,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 215 [2023-01-28 10:17:44,547 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:17:44,547 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:17:44,595 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-01-28 10:17:44,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 65 [2023-01-28 10:17:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:45,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030528266] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:17:45,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:17:45,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-01-28 10:17:45,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957302879] [2023-01-28 10:17:45,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:17:45,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 10:17:45,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:17:45,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 10:17:45,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-01-28 10:17:45,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 682 [2023-01-28 10:17:45,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 739 transitions, 15302 flow. Second operand has 23 states, 23 states have (on average 223.52173913043478) internal successors, (5141), 23 states have internal predecessors, (5141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:45,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:17:45,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 682 [2023-01-28 10:17:45,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:17:47,275 INFO L130 PetriNetUnfolder]: 5828/8517 cut-off events. [2023-01-28 10:17:47,275 INFO L131 PetriNetUnfolder]: For 158040/158040 co-relation queries the response was YES. [2023-01-28 10:17:47,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65497 conditions, 8517 events. 5828/8517 cut-off events. For 158040/158040 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 45465 event pairs, 1886 based on Foata normal form. 1/8518 useless extension candidates. Maximal degree in co-relation 64798. Up to 7956 conditions per place. [2023-01-28 10:17:47,379 INFO L137 encePairwiseOnDemand]: 671/682 looper letters, 502 selfloop transitions, 270 changer transitions 1/773 dead transitions. [2023-01-28 10:17:47,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 773 transitions, 17251 flow [2023-01-28 10:17:47,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 10:17:47,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 10:17:47,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2735 transitions. [2023-01-28 10:17:47,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.334188660801564 [2023-01-28 10:17:47,381 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2735 transitions. [2023-01-28 10:17:47,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2735 transitions. [2023-01-28 10:17:47,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:17:47,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2735 transitions. [2023-01-28 10:17:47,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 227.91666666666666) internal successors, (2735), 12 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:47,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:47,386 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:47,386 INFO L175 Difference]: Start difference. First operand has 360 places, 739 transitions, 15302 flow. Second operand 12 states and 2735 transitions. [2023-01-28 10:17:47,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 773 transitions, 17251 flow [2023-01-28 10:17:47,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 773 transitions, 16474 flow, removed 161 selfloop flow, removed 16 redundant places. [2023-01-28 10:17:47,796 INFO L231 Difference]: Finished difference. Result has 357 places, 745 transitions, 15320 flow [2023-01-28 10:17:47,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=14525, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15320, PETRI_PLACES=357, PETRI_TRANSITIONS=745} [2023-01-28 10:17:47,797 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 325 predicate places. [2023-01-28 10:17:47,797 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 745 transitions, 15320 flow [2023-01-28 10:17:47,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 223.52173913043478) internal successors, (5141), 23 states have internal predecessors, (5141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:47,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:17:47,798 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] [2023-01-28 10:17:47,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-01-28 10:17:48,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-01-28 10:17:48,001 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:17:48,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:17:48,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1466756076, now seen corresponding path program 37 times [2023-01-28 10:17:48,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:17:48,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484550381] [2023-01-28 10:17:48,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:17:48,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:17:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:17:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:48,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:17:48,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484550381] [2023-01-28 10:17:48,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484550381] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:17:48,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697229186] [2023-01-28 10:17:48,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:17:48,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:17:48,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:17:48,526 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:17:48,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-01-28 10:17:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:17:48,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-01-28 10:17:48,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:17:48,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:17:48,746 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:17:48,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-01-28 10:17:48,942 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-01-28 10:17:48,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-01-28 10:17:49,102 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:17:49,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 106 [2023-01-28 10:17:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:49,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:17:51,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:17:51,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 134 [2023-01-28 10:17:51,581 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:17:51,602 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-01-28 10:17:51,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 38 [2023-01-28 10:17:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:51,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697229186] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:17:51,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:17:51,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 19 [2023-01-28 10:17:51,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695399843] [2023-01-28 10:17:51,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:17:51,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 10:17:51,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:17:51,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 10:17:51,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=341, Unknown=1, NotChecked=0, Total=420 [2023-01-28 10:17:51,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 682 [2023-01-28 10:17:51,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 745 transitions, 15320 flow. Second operand has 21 states, 21 states have (on average 223.61904761904762) internal successors, (4696), 21 states have internal predecessors, (4696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:51,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:17:51,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 682 [2023-01-28 10:17:51,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:17:53,799 INFO L130 PetriNetUnfolder]: 5916/8646 cut-off events. [2023-01-28 10:17:53,799 INFO L131 PetriNetUnfolder]: For 161822/161822 co-relation queries the response was YES. [2023-01-28 10:17:53,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66437 conditions, 8646 events. 5916/8646 cut-off events. For 161822/161822 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 46277 event pairs, 1925 based on Foata normal form. 1/8647 useless extension candidates. Maximal degree in co-relation 65735. Up to 8081 conditions per place. [2023-01-28 10:17:53,924 INFO L137 encePairwiseOnDemand]: 671/682 looper letters, 510 selfloop transitions, 270 changer transitions 1/781 dead transitions. [2023-01-28 10:17:53,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 781 transitions, 17300 flow [2023-01-28 10:17:53,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 10:17:53,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 10:17:53,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2516 transitions. [2023-01-28 10:17:53,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33537723273793657 [2023-01-28 10:17:53,926 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2516 transitions. [2023-01-28 10:17:53,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2516 transitions. [2023-01-28 10:17:53,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:17:53,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2516 transitions. [2023-01-28 10:17:53,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 228.72727272727272) internal successors, (2516), 11 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:53,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:53,930 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:53,930 INFO L175 Difference]: Start difference. First operand has 357 places, 745 transitions, 15320 flow. Second operand 11 states and 2516 transitions. [2023-01-28 10:17:53,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 781 transitions, 17300 flow [2023-01-28 10:17:54,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 781 transitions, 16566 flow, removed 101 selfloop flow, removed 9 redundant places. [2023-01-28 10:17:54,425 INFO L231 Difference]: Finished difference. Result has 360 places, 751 transitions, 15381 flow [2023-01-28 10:17:54,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=14586, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15381, PETRI_PLACES=360, PETRI_TRANSITIONS=751} [2023-01-28 10:17:54,425 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 328 predicate places. [2023-01-28 10:17:54,425 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 751 transitions, 15381 flow [2023-01-28 10:17:54,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 223.61904761904762) internal successors, (4696), 21 states have internal predecessors, (4696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:54,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:17:54,426 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] [2023-01-28 10:17:54,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-01-28 10:17:54,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-01-28 10:17:54,627 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:17:54,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:17:54,627 INFO L85 PathProgramCache]: Analyzing trace with hash 799498386, now seen corresponding path program 38 times [2023-01-28 10:17:54,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:17:54,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606387220] [2023-01-28 10:17:54,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:17:54,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:17:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:17:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:55,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:17:55,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606387220] [2023-01-28 10:17:55,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606387220] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:17:55,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750699479] [2023-01-28 10:17:55,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:17:55,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:17:55,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:17:55,086 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:17:55,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-01-28 10:17:55,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:17:55,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:17:55,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 10:17:55,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:17:55,515 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:17:55,515 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 35 treesize of output 23 [2023-01-28 10:17:55,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:55,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:17:55,641 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:17:55,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 95 [2023-01-28 10:17:55,826 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-01-28 10:17:55,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 38 [2023-01-28 10:17:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:55,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750699479] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:17:55,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:17:55,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-01-28 10:17:55,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40997907] [2023-01-28 10:17:55,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:17:55,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 10:17:55,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:17:55,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 10:17:55,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-01-28 10:17:55,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 682 [2023-01-28 10:17:55,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 751 transitions, 15381 flow. Second operand has 17 states, 17 states have (on average 238.35294117647058) internal successors, (4052), 17 states have internal predecessors, (4052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:55,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:17:55,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 682 [2023-01-28 10:17:55,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:17:57,961 INFO L130 PetriNetUnfolder]: 6006/8779 cut-off events. [2023-01-28 10:17:57,961 INFO L131 PetriNetUnfolder]: For 168266/168266 co-relation queries the response was YES. [2023-01-28 10:17:58,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67232 conditions, 8779 events. 6006/8779 cut-off events. For 168266/168266 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 47330 event pairs, 1957 based on Foata normal form. 1/8780 useless extension candidates. Maximal degree in co-relation 66528. Up to 8210 conditions per place. [2023-01-28 10:17:58,055 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 530 selfloop transitions, 258 changer transitions 1/789 dead transitions. [2023-01-28 10:17:58,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 789 transitions, 17396 flow [2023-01-28 10:17:58,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 10:17:58,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 10:17:58,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2202 transitions. [2023-01-28 10:17:58,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3587487781036168 [2023-01-28 10:17:58,056 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2202 transitions. [2023-01-28 10:17:58,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2202 transitions. [2023-01-28 10:17:58,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:17:58,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2202 transitions. [2023-01-28 10:17:58,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 244.66666666666666) internal successors, (2202), 9 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:58,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:58,060 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:58,060 INFO L175 Difference]: Start difference. First operand has 360 places, 751 transitions, 15381 flow. Second operand 9 states and 2202 transitions. [2023-01-28 10:17:58,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 789 transitions, 17396 flow [2023-01-28 10:17:58,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 789 transitions, 16656 flow, removed 104 selfloop flow, removed 8 redundant places. [2023-01-28 10:17:58,652 INFO L231 Difference]: Finished difference. Result has 362 places, 757 transitions, 15424 flow [2023-01-28 10:17:58,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=14641, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15424, PETRI_PLACES=362, PETRI_TRANSITIONS=757} [2023-01-28 10:17:58,652 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 330 predicate places. [2023-01-28 10:17:58,652 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 757 transitions, 15424 flow [2023-01-28 10:17:58,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 238.35294117647058) internal successors, (4052), 17 states have internal predecessors, (4052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:17:58,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:17:58,653 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] [2023-01-28 10:17:58,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-01-28 10:17:58,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:17:58,858 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:17:58,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:17:58,858 INFO L85 PathProgramCache]: Analyzing trace with hash -2034914794, now seen corresponding path program 39 times [2023-01-28 10:17:58,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:17:58,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513242986] [2023-01-28 10:17:58,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:17:58,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:17:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:17:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:17:59,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:17:59,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513242986] [2023-01-28 10:17:59,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513242986] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:17:59,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793193370] [2023-01-28 10:17:59,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:17:59,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:17:59,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:17:59,381 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:17:59,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-01-28 10:17:59,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:17:59,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:17:59,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-01-28 10:17:59,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:17:59,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:17:59,661 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:17:59,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-01-28 10:17:59,836 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-01-28 10:17:59,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-01-28 10:18:00,031 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:00,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 106 [2023-01-28 10:18:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:18:00,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:18:03,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:03,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 118 [2023-01-28 10:18:03,224 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:18:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:18:03,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793193370] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:18:03,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:18:03,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2023-01-28 10:18:03,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131457663] [2023-01-28 10:18:03,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:18:03,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 10:18:03,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:18:03,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 10:18:03,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-01-28 10:18:03,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 682 [2023-01-28 10:18:03,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 757 transitions, 15424 flow. Second operand has 22 states, 22 states have (on average 223.6818181818182) internal successors, (4921), 22 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:03,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:18:03,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 682 [2023-01-28 10:18:03,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:18:05,620 INFO L130 PetriNetUnfolder]: 6094/8908 cut-off events. [2023-01-28 10:18:05,620 INFO L131 PetriNetUnfolder]: For 175886/175886 co-relation queries the response was YES. [2023-01-28 10:18:05,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68010 conditions, 8908 events. 6094/8908 cut-off events. For 175886/175886 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 47939 event pairs, 1970 based on Foata normal form. 1/8909 useless extension candidates. Maximal degree in co-relation 67305. Up to 8268 conditions per place. [2023-01-28 10:18:05,740 INFO L137 encePairwiseOnDemand]: 671/682 looper letters, 516 selfloop transitions, 283 changer transitions 1/800 dead transitions. [2023-01-28 10:18:05,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 800 transitions, 17500 flow [2023-01-28 10:18:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 10:18:05,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 10:18:05,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2520 transitions. [2023-01-28 10:18:05,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33591042388696346 [2023-01-28 10:18:05,742 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2520 transitions. [2023-01-28 10:18:05,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2520 transitions. [2023-01-28 10:18:05,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:18:05,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2520 transitions. [2023-01-28 10:18:05,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 229.0909090909091) internal successors, (2520), 11 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:05,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:05,746 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:05,746 INFO L175 Difference]: Start difference. First operand has 362 places, 757 transitions, 15424 flow. Second operand 11 states and 2520 transitions. [2023-01-28 10:18:05,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 800 transitions, 17500 flow [2023-01-28 10:18:06,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 800 transitions, 16778 flow, removed 107 selfloop flow, removed 6 redundant places. [2023-01-28 10:18:06,357 INFO L231 Difference]: Finished difference. Result has 368 places, 763 transitions, 15542 flow [2023-01-28 10:18:06,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=14702, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15542, PETRI_PLACES=368, PETRI_TRANSITIONS=763} [2023-01-28 10:18:06,358 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 336 predicate places. [2023-01-28 10:18:06,358 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 763 transitions, 15542 flow [2023-01-28 10:18:06,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 223.6818181818182) internal successors, (4921), 22 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:06,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:18:06,358 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] [2023-01-28 10:18:06,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-01-28 10:18:06,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:18:06,561 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:18:06,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:18:06,561 INFO L85 PathProgramCache]: Analyzing trace with hash 517883682, now seen corresponding path program 40 times [2023-01-28 10:18:06,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:18:06,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192072050] [2023-01-28 10:18:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:18:06,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:18:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:18:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:18:07,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:18:07,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192072050] [2023-01-28 10:18:07,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192072050] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:18:07,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938946774] [2023-01-28 10:18:07,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:18:07,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:18:07,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:18:07,171 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:18:07,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-01-28 10:18:07,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:18:07,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:18:07,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 90 conjunts are in the unsatisfiable core [2023-01-28 10:18:07,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:18:07,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:18:07,438 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:18:07,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-01-28 10:18:07,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:07,634 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 [2023-01-28 10:18:07,729 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:18:07,747 INFO L321 Elim1Store]: treesize reduction 67, result has 22.1 percent of original size [2023-01-28 10:18:07,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 41 [2023-01-28 10:18:07,938 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:07,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 106 [2023-01-28 10:18:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:18:08,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:18:11,755 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~B~0.offset))) (and (forall ((~C~0.offset Int) (v_ArrVal_2993 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2993))) (let ((.cse1 (select (select .cse0 c_~A~0.base) c_~A~0.offset)) (.cse2 (select (select .cse0 c_~B~0.base) c_~B~0.offset))) (<= (+ c_~asum~0 c_~bsum~0 (select (select (store .cse0 c_~C~0.base (store (select .cse0 c_~C~0.base) ~C~0.offset (+ .cse1 .cse2))) c_~B~0.base) .cse3)) (+ .cse1 .cse2 c_~csum~0))))) (forall ((~C~0.offset Int) (v_ArrVal_2993 (Array Int Int))) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2993))) (let ((.cse4 (select (select .cse6 c_~A~0.base) c_~A~0.offset)) (.cse5 (select (select .cse6 c_~B~0.base) c_~B~0.offset))) (<= (+ .cse4 .cse5 c_~csum~0) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse6 c_~C~0.base (store (select .cse6 c_~C~0.base) ~C~0.offset (+ .cse4 .cse5))) c_~B~0.base) .cse3)))))))) is different from false [2023-01-28 10:18:11,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:11,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2406 treesize of output 2120 [2023-01-28 10:18:11,827 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:11,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 722 treesize of output 662 [2023-01-28 10:18:16,549 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:16,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 170 treesize of output 166 [2023-01-28 10:18:17,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:17,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:17,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:17,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 29 [2023-01-28 10:18:17,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:17,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:17,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:17,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 46 [2023-01-28 10:18:17,190 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 12 treesize of output 6 [2023-01-28 10:18:17,216 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:17,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 75 [2023-01-28 10:18:17,377 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:17,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 47 [2023-01-28 10:18:17,409 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:17,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 19 [2023-01-28 10:18:17,422 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 14 treesize of output 8 [2023-01-28 10:18:17,455 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:18:17,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:17,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:17,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 33 [2023-01-28 10:18:17,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:17,483 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:17,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 25 [2023-01-28 10:18:17,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:17,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-01-28 10:18:17,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:17,522 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:17,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 212 treesize of output 146 [2023-01-28 10:18:17,585 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 14 treesize of output 8 [2023-01-28 10:18:17,610 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:17,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2023-01-28 10:18:17,650 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:18:17,659 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:17,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 155 treesize of output 113 [2023-01-28 10:18:17,780 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:18:17,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 8 treesize of output 6 [2023-01-28 10:18:17,851 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:18:17,854 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:18:17,873 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 10:18:17,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 22 [2023-01-28 10:18:17,880 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:18:17,891 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:18:17,894 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:18:17,899 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:18:17,923 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:18:17,949 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:18:18,044 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:18:18,048 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:18:18,061 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:18:18,064 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:18:18,069 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:18:18,078 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:18:18,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:18,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-01-28 10:18:18,098 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:18:18,101 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:18:18,190 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:18:18,192 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:18:18,233 INFO L321 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2023-01-28 10:18:18,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 326 treesize of output 228 [2023-01-28 10:18:18,245 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:18,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 50 treesize of output 43 [2023-01-28 10:18:18,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:18,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 64 [2023-01-28 10:18:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-01-28 10:18:18,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938946774] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:18:18,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:18:18,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-01-28 10:18:18,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060276455] [2023-01-28 10:18:18,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:18:18,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 10:18:18,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:18:18,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 10:18:18,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=805, Unknown=2, NotChecked=58, Total=992 [2023-01-28 10:18:18,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 682 [2023-01-28 10:18:18,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 763 transitions, 15542 flow. Second operand has 32 states, 32 states have (on average 221.25) internal successors, (7080), 32 states have internal predecessors, (7080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:18,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:18:18,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 682 [2023-01-28 10:18:18,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:18:20,984 INFO L130 PetriNetUnfolder]: 6214/9083 cut-off events. [2023-01-28 10:18:20,984 INFO L131 PetriNetUnfolder]: For 183906/183906 co-relation queries the response was YES. [2023-01-28 10:18:21,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69269 conditions, 9083 events. 6214/9083 cut-off events. For 183906/183906 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 49018 event pairs, 1972 based on Foata normal form. 1/9084 useless extension candidates. Maximal degree in co-relation 68562. Up to 8322 conditions per place. [2023-01-28 10:18:21,099 INFO L137 encePairwiseOnDemand]: 671/682 looper letters, 532 selfloop transitions, 278 changer transitions 1/811 dead transitions. [2023-01-28 10:18:21,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 811 transitions, 17766 flow [2023-01-28 10:18:21,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 10:18:21,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 10:18:21,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2721 transitions. [2023-01-28 10:18:21,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3324780058651026 [2023-01-28 10:18:21,102 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2721 transitions. [2023-01-28 10:18:21,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2721 transitions. [2023-01-28 10:18:21,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:18:21,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2721 transitions. [2023-01-28 10:18:21,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 226.75) internal successors, (2721), 12 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:21,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:21,106 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:21,106 INFO L175 Difference]: Start difference. First operand has 368 places, 763 transitions, 15542 flow. Second operand 12 states and 2721 transitions. [2023-01-28 10:18:21,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 811 transitions, 17766 flow [2023-01-28 10:18:21,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 811 transitions, 16989 flow, removed 110 selfloop flow, removed 8 redundant places. [2023-01-28 10:18:21,651 INFO L231 Difference]: Finished difference. Result has 375 places, 775 transitions, 15776 flow [2023-01-28 10:18:21,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=14765, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15776, PETRI_PLACES=375, PETRI_TRANSITIONS=775} [2023-01-28 10:18:21,652 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 343 predicate places. [2023-01-28 10:18:21,652 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 775 transitions, 15776 flow [2023-01-28 10:18:21,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 221.25) internal successors, (7080), 32 states have internal predecessors, (7080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:21,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:18:21,653 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] [2023-01-28 10:18:21,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-01-28 10:18:21,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-01-28 10:18:21,857 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:18:21,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:18:21,857 INFO L85 PathProgramCache]: Analyzing trace with hash -756902622, now seen corresponding path program 41 times [2023-01-28 10:18:21,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:18:21,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799870349] [2023-01-28 10:18:21,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:18:21,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:18:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:18:22,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:18:22,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:18:22,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799870349] [2023-01-28 10:18:22,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799870349] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:18:22,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702165947] [2023-01-28 10:18:22,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:18:22,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:18:22,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:18:22,885 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:18:22,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-01-28 10:18:23,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:18:23,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:18:23,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 81 conjunts are in the unsatisfiable core [2023-01-28 10:18:23,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:18:23,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:23,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:23,474 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 10:18:23,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2023-01-28 10:18:23,558 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:23,558 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 28 treesize of output 20 [2023-01-28 10:18:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:18:23,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:18:23,676 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_3060 (Array Int Int))) (<= .cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3060))) (+ (select (select .cse1 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse1 c_~A~0.base) c_~A~0.offset))))) (forall ((v_ArrVal_3060 (Array Int Int))) (<= (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3060))) (+ (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset))) .cse0)))) is different from false [2023-01-28 10:18:23,758 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:23,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 158 treesize of output 154 [2023-01-28 10:18:23,765 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:23,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 78 treesize of output 78 [2023-01-28 10:18:24,059 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:18:24,060 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:18:24,102 INFO L321 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2023-01-28 10:18:24,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 57 [2023-01-28 10:18:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-01-28 10:18:24,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702165947] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:18:24,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:18:24,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 33 [2023-01-28 10:18:24,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454157158] [2023-01-28 10:18:24,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:18:24,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 10:18:24,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:18:24,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 10:18:24,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=976, Unknown=12, NotChecked=64, Total=1190 [2023-01-28 10:18:24,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 682 [2023-01-28 10:18:24,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 775 transitions, 15776 flow. Second operand has 35 states, 35 states have (on average 196.0) internal successors, (6860), 35 states have internal predecessors, (6860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:24,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:18:24,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 682 [2023-01-28 10:18:24,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:18:28,051 INFO L130 PetriNetUnfolder]: 6396/9350 cut-off events. [2023-01-28 10:18:28,051 INFO L131 PetriNetUnfolder]: For 220141/220141 co-relation queries the response was YES. [2023-01-28 10:18:28,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72643 conditions, 9350 events. 6396/9350 cut-off events. For 220141/220141 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 50889 event pairs, 1979 based on Foata normal form. 1/9351 useless extension candidates. Maximal degree in co-relation 71932. Up to 8377 conditions per place. [2023-01-28 10:18:28,164 INFO L137 encePairwiseOnDemand]: 669/682 looper letters, 571 selfloop transitions, 296 changer transitions 1/868 dead transitions. [2023-01-28 10:18:28,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 868 transitions, 18892 flow [2023-01-28 10:18:28,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 10:18:28,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 10:18:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3852 transitions. [2023-01-28 10:18:28,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29726809692853834 [2023-01-28 10:18:28,166 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3852 transitions. [2023-01-28 10:18:28,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3852 transitions. [2023-01-28 10:18:28,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:18:28,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3852 transitions. [2023-01-28 10:18:28,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 202.73684210526315) internal successors, (3852), 19 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:28,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 682.0) internal successors, (13640), 20 states have internal predecessors, (13640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:28,174 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 682.0) internal successors, (13640), 20 states have internal predecessors, (13640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:28,174 INFO L175 Difference]: Start difference. First operand has 375 places, 775 transitions, 15776 flow. Second operand 19 states and 3852 transitions. [2023-01-28 10:18:28,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 868 transitions, 18892 flow [2023-01-28 10:18:28,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 868 transitions, 18141 flow, removed 125 selfloop flow, removed 7 redundant places. [2023-01-28 10:18:28,802 INFO L231 Difference]: Finished difference. Result has 389 places, 792 transitions, 16486 flow [2023-01-28 10:18:28,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=15049, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=16486, PETRI_PLACES=389, PETRI_TRANSITIONS=792} [2023-01-28 10:18:28,803 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 357 predicate places. [2023-01-28 10:18:28,803 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 792 transitions, 16486 flow [2023-01-28 10:18:28,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 196.0) internal successors, (6860), 35 states have internal predecessors, (6860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:28,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:18:28,804 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] [2023-01-28 10:18:28,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-01-28 10:18:29,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-01-28 10:18:29,007 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:18:29,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:18:29,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1173329740, now seen corresponding path program 42 times [2023-01-28 10:18:29,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:18:29,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160393839] [2023-01-28 10:18:29,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:18:29,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:18:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:18:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:18:30,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:18:30,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160393839] [2023-01-28 10:18:30,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160393839] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:18:30,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119547656] [2023-01-28 10:18:30,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:18:30,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:18:30,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:18:30,159 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:18:30,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-01-28 10:18:30,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 10:18:30,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:18:30,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 98 conjunts are in the unsatisfiable core [2023-01-28 10:18:30,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:18:30,404 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-01-28 10:18:30,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-01-28 10:18:30,457 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-01-28 10:18:30,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-01-28 10:18:30,521 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:18:30,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-01-28 10:18:30,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:30,916 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 [2023-01-28 10:18:30,999 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:18:31,012 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-01-28 10:18:31,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-01-28 10:18:31,146 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:18:31,166 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:31,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 106 [2023-01-28 10:18:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:18:31,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:18:32,176 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset))) (and (forall ((~C~0.offset Int) (v_ArrVal_3132 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3132))) (let ((.cse0 (select (select .cse2 c_~A~0.base) c_~A~0.offset)) (.cse1 (select (select .cse2 c_~B~0.base) c_~B~0.offset))) (<= (+ .cse0 .cse1 c_~csum~0) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse2 c_~C~0.base (store (select .cse2 c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~A~0.base) .cse3)))))) (forall ((~C~0.offset Int) (v_ArrVal_3132 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3132))) (let ((.cse5 (select (select .cse4 c_~A~0.base) c_~A~0.offset)) (.cse6 (select (select .cse4 c_~B~0.base) c_~B~0.offset))) (<= (+ c_~asum~0 c_~bsum~0 (select (select (store .cse4 c_~C~0.base (store (select .cse4 c_~C~0.base) ~C~0.offset (+ .cse5 .cse6))) c_~A~0.base) .cse3)) (+ .cse5 .cse6 c_~csum~0))))))) is different from false [2023-01-28 10:18:32,201 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:32,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2050 treesize of output 1796 [2023-01-28 10:18:32,261 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:32,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 722 treesize of output 662 [2023-01-28 10:18:37,590 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 12 treesize of output 6 [2023-01-28 10:18:37,597 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:37,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 19 [2023-01-28 10:18:37,610 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:18:37,618 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:37,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 39 [2023-01-28 10:18:37,633 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:18:37,648 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:37,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2023-01-28 10:18:37,683 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 14 treesize of output 8 [2023-01-28 10:18:37,690 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:18:37,698 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:37,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 39 [2023-01-28 10:18:37,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:37,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2023-01-28 10:18:37,722 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:18:37,729 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:37,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 37 [2023-01-28 10:18:37,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:37,774 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:37,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 278 treesize of output 196 [2023-01-28 10:18:37,988 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:37,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 17 [2023-01-28 10:18:38,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:38,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:38,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:38,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 29 [2023-01-28 10:18:38,015 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 14 treesize of output 8 [2023-01-28 10:18:38,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:38,035 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:38,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 67 [2023-01-28 10:18:38,062 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:18:38,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:38,082 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:38,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 25 [2023-01-28 10:18:38,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:38,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-01-28 10:18:38,137 INFO L321 Elim1Store]: treesize reduction 28, result has 56.9 percent of original size [2023-01-28 10:18:38,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 47 [2023-01-28 10:18:38,181 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 12 treesize of output 6 [2023-01-28 10:18:38,265 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:18:38,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:38,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2023-01-28 10:18:38,277 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:18:38,291 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:18:38,295 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:18:38,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2023-01-28 10:18:38,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:38,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2023-01-28 10:18:38,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:38,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-01-28 10:18:38,372 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:18:38,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:38,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2023-01-28 10:18:38,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:38,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-01-28 10:18:38,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:38,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-01-28 10:18:38,403 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:18:38,462 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:18:38,464 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:18:38,505 INFO L321 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2023-01-28 10:18:38,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 326 treesize of output 228 [2023-01-28 10:18:38,518 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:38,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 50 treesize of output 43 [2023-01-28 10:18:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:18:39,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119547656] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:18:39,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:18:39,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2023-01-28 10:18:39,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306104021] [2023-01-28 10:18:39,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:18:39,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 10:18:39,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:18:39,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 10:18:39,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=939, Unknown=1, NotChecked=62, Total=1122 [2023-01-28 10:18:39,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 682 [2023-01-28 10:18:39,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 792 transitions, 16486 flow. Second operand has 34 states, 34 states have (on average 193.88235294117646) internal successors, (6592), 34 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:39,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:18:39,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 682 [2023-01-28 10:18:39,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:18:43,034 INFO L130 PetriNetUnfolder]: 6564/9590 cut-off events. [2023-01-28 10:18:43,035 INFO L131 PetriNetUnfolder]: For 230600/230600 co-relation queries the response was YES. [2023-01-28 10:18:43,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75241 conditions, 9590 events. 6564/9590 cut-off events. For 230600/230600 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 52249 event pairs, 2143 based on Foata normal form. 1/9591 useless extension candidates. Maximal degree in co-relation 74527. Up to 8810 conditions per place. [2023-01-28 10:18:43,169 INFO L137 encePairwiseOnDemand]: 666/682 looper letters, 572 selfloop transitions, 315 changer transitions 1/888 dead transitions. [2023-01-28 10:18:43,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 888 transitions, 19790 flow [2023-01-28 10:18:43,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 10:18:43,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 10:18:43,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4367 transitions. [2023-01-28 10:18:43,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29105571847507333 [2023-01-28 10:18:43,172 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4367 transitions. [2023-01-28 10:18:43,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4367 transitions. [2023-01-28 10:18:43,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:18:43,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4367 transitions. [2023-01-28 10:18:43,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 198.5) internal successors, (4367), 22 states have internal predecessors, (4367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:43,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 682.0) internal successors, (15686), 23 states have internal predecessors, (15686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:43,181 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 682.0) internal successors, (15686), 23 states have internal predecessors, (15686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:43,181 INFO L175 Difference]: Start difference. First operand has 389 places, 792 transitions, 16486 flow. Second operand 22 states and 4367 transitions. [2023-01-28 10:18:43,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 888 transitions, 19790 flow [2023-01-28 10:18:43,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 888 transitions, 18823 flow, removed 438 selfloop flow, removed 7 redundant places. [2023-01-28 10:18:43,970 INFO L231 Difference]: Finished difference. Result has 406 places, 831 transitions, 17325 flow [2023-01-28 10:18:43,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=15773, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=17325, PETRI_PLACES=406, PETRI_TRANSITIONS=831} [2023-01-28 10:18:43,970 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 374 predicate places. [2023-01-28 10:18:43,970 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 831 transitions, 17325 flow [2023-01-28 10:18:43,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 193.88235294117646) internal successors, (6592), 34 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:43,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:18:43,971 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] [2023-01-28 10:18:43,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-01-28 10:18:44,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-01-28 10:18:44,177 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:18:44,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:18:44,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1735077004, now seen corresponding path program 43 times [2023-01-28 10:18:44,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:18:44,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12372668] [2023-01-28 10:18:44,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:18:44,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:18:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:18:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:18:44,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:18:44,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12372668] [2023-01-28 10:18:44,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12372668] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:18:44,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830098920] [2023-01-28 10:18:44,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:18:44,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:18:44,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:18:44,738 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:18:44,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-01-28 10:18:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:18:44,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 79 conjunts are in the unsatisfiable core [2023-01-28 10:18:44,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:18:45,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:45,173 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 [2023-01-28 10:18:45,308 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:18:45,316 INFO L321 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2023-01-28 10:18:45,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 26 [2023-01-28 10:18:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:18:45,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:18:45,436 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~B~0.offset))) (and (forall ((v_ArrVal_3199 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3199))) (let ((.cse0 (select .cse2 ~B~0.base))) (<= (+ (select .cse0 .cse1) c_~asum~0 c_~bsum~0) (+ (select .cse0 c_~B~0.offset) c_~csum~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset)))))) (forall ((v_ArrVal_3199 (Array Int Int)) (~B~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3199))) (let ((.cse3 (select .cse4 ~B~0.base))) (<= (+ (select .cse3 c_~B~0.offset) c_~csum~0 (select (select .cse4 c_~A~0.base) c_~A~0.offset)) (+ (select .cse3 .cse1) c_~asum~0 c_~bsum~0))))))) is different from false [2023-01-28 10:18:45,492 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:45,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 166 [2023-01-28 10:18:45,507 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:45,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 98 [2023-01-28 10:18:45,815 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:18:45,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-01-28 10:18:45,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830098920] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:18:45,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:18:45,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-01-28 10:18:45,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648016054] [2023-01-28 10:18:45,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:18:45,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 10:18:45,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:18:45,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 10:18:45,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=543, Unknown=1, NotChecked=48, Total=702 [2023-01-28 10:18:45,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 682 [2023-01-28 10:18:45,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 831 transitions, 17325 flow. Second operand has 27 states, 27 states have (on average 233.44444444444446) internal successors, (6303), 27 states have internal predecessors, (6303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:45,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:18:45,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 682 [2023-01-28 10:18:45,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:18:48,443 INFO L130 PetriNetUnfolder]: 6722/9823 cut-off events. [2023-01-28 10:18:48,443 INFO L131 PetriNetUnfolder]: For 229426/229426 co-relation queries the response was YES. [2023-01-28 10:18:48,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78637 conditions, 9823 events. 6722/9823 cut-off events. For 229426/229426 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 54063 event pairs, 2080 based on Foata normal form. 1/9824 useless extension candidates. Maximal degree in co-relation 77899. Up to 8830 conditions per place. [2023-01-28 10:18:48,571 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 594 selfloop transitions, 288 changer transitions 1/883 dead transitions. [2023-01-28 10:18:48,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 883 transitions, 19984 flow [2023-01-28 10:18:48,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 10:18:48,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 10:18:48,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2411 transitions. [2023-01-28 10:18:48,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3535190615835777 [2023-01-28 10:18:48,573 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2411 transitions. [2023-01-28 10:18:48,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2411 transitions. [2023-01-28 10:18:48,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:18:48,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2411 transitions. [2023-01-28 10:18:48,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 241.1) internal successors, (2411), 10 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:48,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:48,577 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:48,577 INFO L175 Difference]: Start difference. First operand has 406 places, 831 transitions, 17325 flow. Second operand 10 states and 2411 transitions. [2023-01-28 10:18:48,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 883 transitions, 19984 flow [2023-01-28 10:18:49,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 883 transitions, 19070 flow, removed 244 selfloop flow, removed 15 redundant places. [2023-01-28 10:18:49,268 INFO L231 Difference]: Finished difference. Result has 402 places, 841 transitions, 17634 flow [2023-01-28 10:18:49,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=16433, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17634, PETRI_PLACES=402, PETRI_TRANSITIONS=841} [2023-01-28 10:18:49,268 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 370 predicate places. [2023-01-28 10:18:49,268 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 841 transitions, 17634 flow [2023-01-28 10:18:49,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 233.44444444444446) internal successors, (6303), 27 states have internal predecessors, (6303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:49,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:18:49,269 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] [2023-01-28 10:18:49,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-01-28 10:18:49,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:18:49,474 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:18:49,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:18:49,475 INFO L85 PathProgramCache]: Analyzing trace with hash 634044084, now seen corresponding path program 44 times [2023-01-28 10:18:49,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:18:49,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380661595] [2023-01-28 10:18:49,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:18:49,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:18:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:18:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:18:50,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:18:50,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380661595] [2023-01-28 10:18:50,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380661595] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:18:50,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991722944] [2023-01-28 10:18:50,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:18:50,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:18:50,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:18:50,037 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:18:50,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-01-28 10:18:50,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:18:50,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:18:50,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 82 conjunts are in the unsatisfiable core [2023-01-28 10:18:50,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:18:50,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:50,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:50,573 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 10:18:50,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2023-01-28 10:18:50,664 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:50,665 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 28 treesize of output 20 [2023-01-28 10:18:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:18:50,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:18:50,775 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_3266 (Array Int Int))) (<= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3266))) (+ (select (select .cse0 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset))) .cse1)) (forall ((v_ArrVal_3266 (Array Int Int))) (<= .cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3266))) (+ (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset))))))) is different from false [2023-01-28 10:18:50,781 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0 (select (select |c_#memory_int| c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~B~0.offset))))) (and (forall ((v_ArrVal_3266 (Array Int Int))) (<= .cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3266))) (+ (select (select .cse1 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse1 c_~A~0.base) c_~A~0.offset))))) (forall ((v_ArrVal_3266 (Array Int Int))) (<= (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3266))) (+ (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset))) .cse0)))) is different from false [2023-01-28 10:18:50,811 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:50,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 158 treesize of output 154 [2023-01-28 10:18:50,820 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:50,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 78 treesize of output 78 [2023-01-28 10:18:51,248 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:18:51,248 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:18:51,293 INFO L321 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2023-01-28 10:18:51,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 57 [2023-01-28 10:18:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-01-28 10:18:51,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991722944] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:18:51,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:18:51,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-01-28 10:18:51,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775058040] [2023-01-28 10:18:51,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:18:51,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 10:18:51,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:18:51,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 10:18:51,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=640, Unknown=2, NotChecked=106, Total=870 [2023-01-28 10:18:51,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 682 [2023-01-28 10:18:51,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 841 transitions, 17634 flow. Second operand has 30 states, 30 states have (on average 227.33333333333334) internal successors, (6820), 30 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:51,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:18:51,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 682 [2023-01-28 10:18:51,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:18:54,341 INFO L130 PetriNetUnfolder]: 6850/10012 cut-off events. [2023-01-28 10:18:54,341 INFO L131 PetriNetUnfolder]: For 236858/236858 co-relation queries the response was YES. [2023-01-28 10:18:54,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80587 conditions, 10012 events. 6850/10012 cut-off events. For 236858/236858 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 55228 event pairs, 2073 based on Foata normal form. 1/10013 useless extension candidates. Maximal degree in co-relation 79871. Up to 8884 conditions per place. [2023-01-28 10:18:54,462 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 597 selfloop transitions, 294 changer transitions 1/892 dead transitions. [2023-01-28 10:18:54,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 892 transitions, 20293 flow [2023-01-28 10:18:54,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 10:18:54,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 10:18:54,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2126 transitions. [2023-01-28 10:18:54,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3463668947539915 [2023-01-28 10:18:54,464 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2126 transitions. [2023-01-28 10:18:54,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2126 transitions. [2023-01-28 10:18:54,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:18:54,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2126 transitions. [2023-01-28 10:18:54,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 236.22222222222223) internal successors, (2126), 9 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:54,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:54,467 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:54,467 INFO L175 Difference]: Start difference. First operand has 402 places, 841 transitions, 17634 flow. Second operand 9 states and 2126 transitions. [2023-01-28 10:18:54,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 892 transitions, 20293 flow [2023-01-28 10:18:55,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 892 transitions, 19425 flow, removed 273 selfloop flow, removed 5 redundant places. [2023-01-28 10:18:55,388 INFO L231 Difference]: Finished difference. Result has 408 places, 850 transitions, 18001 flow [2023-01-28 10:18:55,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=16782, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18001, PETRI_PLACES=408, PETRI_TRANSITIONS=850} [2023-01-28 10:18:55,389 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 376 predicate places. [2023-01-28 10:18:55,389 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 850 transitions, 18001 flow [2023-01-28 10:18:55,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 227.33333333333334) internal successors, (6820), 30 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:55,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:18:55,390 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] [2023-01-28 10:18:55,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-01-28 10:18:55,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:18:55,595 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:18:55,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:18:55,595 INFO L85 PathProgramCache]: Analyzing trace with hash 2022764422, now seen corresponding path program 45 times [2023-01-28 10:18:55,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:18:55,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426016995] [2023-01-28 10:18:55,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:18:55,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:18:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:18:56,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:18:56,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:18:56,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426016995] [2023-01-28 10:18:56,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426016995] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:18:56,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036601889] [2023-01-28 10:18:56,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:18:56,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:18:56,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:18:56,189 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:18:56,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-01-28 10:18:56,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:18:56,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:18:56,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 79 conjunts are in the unsatisfiable core [2023-01-28 10:18:56,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:18:56,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:56,629 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 [2023-01-28 10:18:56,758 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:56,758 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 35 treesize of output 23 [2023-01-28 10:18:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:18:56,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:18:56,884 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset))) (and (forall ((v_ArrVal_3333 (Array Int Int)) (~A~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3333))) (let ((.cse0 (select .cse2 ~A~0.base))) (<= (+ c_~asum~0 c_~bsum~0 (select .cse0 .cse1)) (+ c_~csum~0 (select (select .cse2 c_~B~0.base) c_~B~0.offset) (select .cse0 c_~A~0.offset)))))) (forall ((v_ArrVal_3333 (Array Int Int)) (~A~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3333))) (let ((.cse4 (select .cse3 ~A~0.base))) (<= (+ c_~csum~0 (select (select .cse3 c_~B~0.base) c_~B~0.offset) (select .cse4 c_~A~0.offset)) (+ c_~asum~0 c_~bsum~0 (select .cse4 .cse1)))))))) is different from false [2023-01-28 10:18:56,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:56,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 166 [2023-01-28 10:18:56,931 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:18:56,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 98 [2023-01-28 10:18:57,330 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:18:57,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:18:57,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2023-01-28 10:18:57,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:18:57,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036601889] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:18:57,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:18:57,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-01-28 10:18:57,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209518143] [2023-01-28 10:18:57,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:18:57,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 10:18:57,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:18:57,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 10:18:57,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=546, Unknown=1, NotChecked=48, Total=702 [2023-01-28 10:18:57,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 682 [2023-01-28 10:18:57,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 850 transitions, 18001 flow. Second operand has 27 states, 27 states have (on average 227.5185185185185) internal successors, (6143), 27 states have internal predecessors, (6143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:18:57,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:18:57,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 682 [2023-01-28 10:18:57,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:19:00,673 INFO L130 PetriNetUnfolder]: 6910/10101 cut-off events. [2023-01-28 10:19:00,673 INFO L131 PetriNetUnfolder]: For 221118/221118 co-relation queries the response was YES. [2023-01-28 10:19:00,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80812 conditions, 10101 events. 6910/10101 cut-off events. For 221118/221118 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 55569 event pairs, 2325 based on Foata normal form. 1/10102 useless extension candidates. Maximal degree in co-relation 80092. Up to 9293 conditions per place. [2023-01-28 10:19:00,805 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 591 selfloop transitions, 297 changer transitions 1/889 dead transitions. [2023-01-28 10:19:00,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 889 transitions, 20276 flow [2023-01-28 10:19:00,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 10:19:00,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 10:19:00,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2116 transitions. [2023-01-28 10:19:00,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34473769957640926 [2023-01-28 10:19:00,807 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2116 transitions. [2023-01-28 10:19:00,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2116 transitions. [2023-01-28 10:19:00,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:19:00,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2116 transitions. [2023-01-28 10:19:00,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 235.11111111111111) internal successors, (2116), 9 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:19:00,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:19:00,811 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:19:00,811 INFO L175 Difference]: Start difference. First operand has 408 places, 850 transitions, 18001 flow. Second operand 9 states and 2116 transitions. [2023-01-28 10:19:00,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 889 transitions, 20276 flow [2023-01-28 10:19:01,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 889 transitions, 19440 flow, removed 259 selfloop flow, removed 4 redundant places. [2023-01-28 10:19:01,696 INFO L231 Difference]: Finished difference. Result has 414 places, 855 transitions, 18039 flow [2023-01-28 10:19:01,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=17167, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=850, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18039, PETRI_PLACES=414, PETRI_TRANSITIONS=855} [2023-01-28 10:19:01,697 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 382 predicate places. [2023-01-28 10:19:01,697 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 855 transitions, 18039 flow [2023-01-28 10:19:01,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 227.5185185185185) internal successors, (6143), 27 states have internal predecessors, (6143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:19:01,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:19:01,697 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] [2023-01-28 10:19:01,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-01-28 10:19:01,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:19:01,902 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:19:01,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:19:01,903 INFO L85 PathProgramCache]: Analyzing trace with hash -946393740, now seen corresponding path program 46 times [2023-01-28 10:19:01,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:19:01,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519061183] [2023-01-28 10:19:01,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:19:01,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:19:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:19:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:19:02,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:19:02,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519061183] [2023-01-28 10:19:02,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519061183] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:19:02,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419607989] [2023-01-28 10:19:02,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:19:02,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:19:02,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:19:02,439 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:19:02,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-01-28 10:19:02,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:19:02,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:19:02,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 79 conjunts are in the unsatisfiable core [2023-01-28 10:19:02,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:19:02,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:19:02,911 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 [2023-01-28 10:19:03,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:19:03,072 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 35 treesize of output 23 [2023-01-28 10:19:03,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:19:03,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:19:03,215 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~B~0.offset))) (and (forall ((v_ArrVal_3400 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3400))) (let ((.cse0 (select .cse2 ~B~0.base))) (<= (+ c_~asum~0 c_~bsum~0 (select .cse0 .cse1)) (+ (select .cse0 c_~B~0.offset) c_~csum~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset)))))) (forall ((v_ArrVal_3400 (Array Int Int)) (~B~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3400))) (let ((.cse3 (select .cse4 ~B~0.base))) (<= (+ (select .cse3 c_~B~0.offset) c_~csum~0 (select (select .cse4 c_~A~0.base) c_~A~0.offset)) (+ c_~asum~0 c_~bsum~0 (select .cse3 .cse1)))))))) is different from false [2023-01-28 10:19:03,253 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:19:03,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 166 [2023-01-28 10:19:03,271 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:19:03,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 98 [2023-01-28 10:19:03,611 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:19:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-01-28 10:19:03,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419607989] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:19:03,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:19:03,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2023-01-28 10:19:03,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741135485] [2023-01-28 10:19:03,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:19:03,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 10:19:03,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:19:03,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 10:19:03,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=498, Unknown=1, NotChecked=46, Total=650 [2023-01-28 10:19:03,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 682 [2023-01-28 10:19:03,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 855 transitions, 18039 flow. Second operand has 26 states, 26 states have (on average 233.53846153846155) internal successors, (6072), 26 states have internal predecessors, (6072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:19:03,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:19:03,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 682 [2023-01-28 10:19:03,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:19:06,635 INFO L130 PetriNetUnfolder]: 6970/10190 cut-off events. [2023-01-28 10:19:06,635 INFO L131 PetriNetUnfolder]: For 206815/206815 co-relation queries the response was YES. [2023-01-28 10:19:06,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81076 conditions, 10190 events. 6970/10190 cut-off events. For 206815/206815 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 56172 event pairs, 2312 based on Foata normal form. 1/10191 useless extension candidates. Maximal degree in co-relation 80353. Up to 9421 conditions per place. [2023-01-28 10:19:06,893 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 625 selfloop transitions, 272 changer transitions 1/898 dead transitions. [2023-01-28 10:19:06,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 898 transitions, 20364 flow [2023-01-28 10:19:06,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 10:19:06,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 10:19:06,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2405 transitions. [2023-01-28 10:19:06,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3526392961876833 [2023-01-28 10:19:06,896 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2405 transitions. [2023-01-28 10:19:06,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2405 transitions. [2023-01-28 10:19:06,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:19:06,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2405 transitions. [2023-01-28 10:19:06,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 240.5) internal successors, (2405), 10 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:19:06,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:19:06,900 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:19:06,900 INFO L175 Difference]: Start difference. First operand has 414 places, 855 transitions, 18039 flow. Second operand 10 states and 2405 transitions. [2023-01-28 10:19:06,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 898 transitions, 20364 flow [2023-01-28 10:19:07,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 898 transitions, 19562 flow, removed 113 selfloop flow, removed 6 redundant places. [2023-01-28 10:19:07,553 INFO L231 Difference]: Finished difference. Result has 419 places, 860 transitions, 18069 flow [2023-01-28 10:19:07,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=17243, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18069, PETRI_PLACES=419, PETRI_TRANSITIONS=860} [2023-01-28 10:19:07,554 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 387 predicate places. [2023-01-28 10:19:07,554 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 860 transitions, 18069 flow [2023-01-28 10:19:07,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 233.53846153846155) internal successors, (6072), 26 states have internal predecessors, (6072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:19:07,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:19:07,554 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] [2023-01-28 10:19:07,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-01-28 10:19:07,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-01-28 10:19:07,760 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:19:07,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:19:07,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1597507528, now seen corresponding path program 47 times [2023-01-28 10:19:07,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:19:07,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62012711] [2023-01-28 10:19:07,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:19:07,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:19:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:19:08,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:19:08,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:19:08,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62012711] [2023-01-28 10:19:08,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62012711] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:19:08,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219159718] [2023-01-28 10:19:08,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:19:08,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:19:08,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:19:08,171 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:19:08,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-01-28 10:19:08,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:19:08,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:19:08,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 10:19:08,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:19:08,656 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:19:08,656 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 35 treesize of output 23 [2023-01-28 10:19:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:19:08,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:19:08,789 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:19:08,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 87 [2023-01-28 10:19:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:19:09,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219159718] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:19:09,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:19:09,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 16 [2023-01-28 10:19:09,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166758635] [2023-01-28 10:19:09,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:19:09,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 10:19:09,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:19:09,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 10:19:09,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-01-28 10:19:09,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 682 [2023-01-28 10:19:09,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 860 transitions, 18069 flow. Second operand has 18 states, 18 states have (on average 237.94444444444446) internal successors, (4283), 18 states have internal predecessors, (4283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:19:09,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:19:09,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 682 [2023-01-28 10:19:09,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:19:12,030 INFO L130 PetriNetUnfolder]: 7164/10475 cut-off events. [2023-01-28 10:19:12,031 INFO L131 PetriNetUnfolder]: For 243720/243720 co-relation queries the response was YES. [2023-01-28 10:19:12,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84458 conditions, 10475 events. 7164/10475 cut-off events. For 243720/243720 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 58160 event pairs, 2504 based on Foata normal form. 1/10476 useless extension candidates. Maximal degree in co-relation 83733. Up to 9776 conditions per place. [2023-01-28 10:19:12,170 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 672 selfloop transitions, 241 changer transitions 1/914 dead transitions. [2023-01-28 10:19:12,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 914 transitions, 20962 flow [2023-01-28 10:19:12,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 10:19:12,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 10:19:12,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2212 transitions. [2023-01-28 10:19:12,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3603779732811991 [2023-01-28 10:19:12,172 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2212 transitions. [2023-01-28 10:19:12,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2212 transitions. [2023-01-28 10:19:12,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:19:12,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2212 transitions. [2023-01-28 10:19:12,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 245.77777777777777) internal successors, (2212), 9 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:19:12,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:19:12,175 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:19:12,175 INFO L175 Difference]: Start difference. First operand has 419 places, 860 transitions, 18069 flow. Second operand 9 states and 2212 transitions. [2023-01-28 10:19:12,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 914 transitions, 20962 flow [2023-01-28 10:19:12,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 914 transitions, 20198 flow, removed 118 selfloop flow, removed 7 redundant places. [2023-01-28 10:19:12,955 INFO L231 Difference]: Finished difference. Result has 423 places, 875 transitions, 18607 flow [2023-01-28 10:19:12,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=17321, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=860, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18607, PETRI_PLACES=423, PETRI_TRANSITIONS=875} [2023-01-28 10:19:12,956 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 391 predicate places. [2023-01-28 10:19:12,956 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 875 transitions, 18607 flow [2023-01-28 10:19:12,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 237.94444444444446) internal successors, (4283), 18 states have internal predecessors, (4283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:19:12,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:19:12,957 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] [2023-01-28 10:19:12,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-01-28 10:19:13,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-01-28 10:19:13,162 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:19:13,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:19:13,162 INFO L85 PathProgramCache]: Analyzing trace with hash -2004462942, now seen corresponding path program 48 times [2023-01-28 10:19:13,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:19:13,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113507799] [2023-01-28 10:19:13,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:19:13,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:19:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:19:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:19:13,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:19:13,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113507799] [2023-01-28 10:19:13,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113507799] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:19:13,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257041635] [2023-01-28 10:19:13,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:19:13,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:19:13,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:19:13,687 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:19:13,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-01-28 10:19:13,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 10:19:13,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:19:13,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 82 conjunts are in the unsatisfiable core [2023-01-28 10:19:13,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:19:14,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:19:14,115 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 [2023-01-28 10:19:14,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:19:14,152 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 [2023-01-28 10:19:14,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:19:14,297 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 35 treesize of output 23 [2023-01-28 10:19:14,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:19:14,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:19:14,444 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_3534 (Array Int Int))) (<= .cse0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3534) c_~A~0.base) c_~A~0.offset) c_~csum~0))) (forall ((v_ArrVal_3534 (Array Int Int))) (<= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3534) c_~A~0.base) c_~A~0.offset) c_~csum~0) .cse0)))) is different from false [2023-01-28 10:19:16,518 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:19:16,518 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 218 treesize of output 154 [2023-01-28 10:19:16,526 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 33 treesize of output 31 [2023-01-28 10:19:16,529 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 34 treesize of output 30 [2023-01-28 10:19:16,550 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:19:16,550 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:19:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:19:16,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257041635] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:19:16,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:19:16,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 26 [2023-01-28 10:19:16,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770150947] [2023-01-28 10:19:16,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:19:16,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 10:19:16,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:19:16,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 10:19:16,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=595, Unknown=7, NotChecked=50, Total=756 [2023-01-28 10:19:16,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 682 [2023-01-28 10:19:16,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 875 transitions, 18607 flow. Second operand has 28 states, 28 states have (on average 230.28571428571428) internal successors, (6448), 28 states have internal predecessors, (6448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:19:16,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:19:16,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 682 [2023-01-28 10:19:16,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:19:19,989 INFO L130 PetriNetUnfolder]: 7259/10617 cut-off events. [2023-01-28 10:19:19,989 INFO L131 PetriNetUnfolder]: For 240634/240634 co-relation queries the response was YES. [2023-01-28 10:19:20,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85378 conditions, 10617 events. 7259/10617 cut-off events. For 240634/240634 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 58891 event pairs, 1426 based on Foata normal form. 1/10618 useless extension candidates. Maximal degree in co-relation 84650. Up to 9163 conditions per place. [2023-01-28 10:19:20,137 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 565 selfloop transitions, 377 changer transitions 1/943 dead transitions. [2023-01-28 10:19:20,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 943 transitions, 21289 flow [2023-01-28 10:19:20,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 10:19:20,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 10:19:20,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2379 transitions. [2023-01-28 10:19:20,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34882697947214075 [2023-01-28 10:19:20,139 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2379 transitions. [2023-01-28 10:19:20,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2379 transitions. [2023-01-28 10:19:20,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:19:20,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2379 transitions. [2023-01-28 10:19:20,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 237.9) internal successors, (2379), 10 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:19:20,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:19:20,143 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:19:20,143 INFO L175 Difference]: Start difference. First operand has 423 places, 875 transitions, 18607 flow. Second operand 10 states and 2379 transitions. [2023-01-28 10:19:20,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 943 transitions, 21289 flow [2023-01-28 10:19:21,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 943 transitions, 20360 flow, removed 338 selfloop flow, removed 3 redundant places. [2023-01-28 10:19:21,090 INFO L231 Difference]: Finished difference. Result has 433 places, 894 transitions, 19126 flow [2023-01-28 10:19:21,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=17678, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=875, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19126, PETRI_PLACES=433, PETRI_TRANSITIONS=894} [2023-01-28 10:19:21,091 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 401 predicate places. [2023-01-28 10:19:21,091 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 894 transitions, 19126 flow [2023-01-28 10:19:21,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 230.28571428571428) internal successors, (6448), 28 states have internal predecessors, (6448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:19:21,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:19:21,091 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] [2023-01-28 10:19:21,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-01-28 10:19:21,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:19:21,296 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:19:21,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:19:21,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1319615602, now seen corresponding path program 49 times [2023-01-28 10:19:21,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:19:21,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328167593] [2023-01-28 10:19:21,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:19:21,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:19:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:19:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:19:22,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:19:22,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328167593] [2023-01-28 10:19:22,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328167593] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:19:22,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875565977] [2023-01-28 10:19:22,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:19:22,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:19:22,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:19:22,346 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:19:22,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-01-28 10:19:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:19:22,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 92 conjunts are in the unsatisfiable core [2023-01-28 10:19:22,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:19:22,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:19:22,666 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:19:22,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-01-28 10:19:22,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:19:22,871 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 [2023-01-28 10:19:22,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:19:22,921 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 [2023-01-28 10:19:23,052 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-01-28 10:19:23,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-01-28 10:19:23,173 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:19:23,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 106 [2023-01-28 10:19:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:19:23,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:19:25,273 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~C~0.offset Int) (v_ArrVal_3603 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3603))) (let ((.cse1 (select (select .cse0 c_~A~0.base) c_~A~0.offset)) (.cse2 (select (select .cse0 c_~B~0.base) c_~B~0.offset))) (<= (+ c_~asum~0 c_~bsum~0 (select (select (store .cse0 c_~C~0.base (store (select .cse0 c_~C~0.base) ~C~0.offset (+ .cse1 .cse2))) c_~B~0.base) c_~B~0.offset)) (+ .cse1 .cse2 c_~csum~0))))) (forall ((~C~0.offset Int) (v_ArrVal_3603 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3603))) (let ((.cse3 (select (select .cse5 c_~A~0.base) c_~A~0.offset)) (.cse4 (select (select .cse5 c_~B~0.base) c_~B~0.offset))) (<= (+ .cse3 .cse4 c_~csum~0) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse5 c_~C~0.base (store (select .cse5 c_~C~0.base) ~C~0.offset (+ .cse3 .cse4))) c_~B~0.base) c_~B~0.offset))))))) is different from false [2023-01-28 10:19:25,288 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~C~0.offset Int) (v_ArrVal_3602 (Array Int Int)) (v_ArrVal_3603 (Array Int Int))) (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3602) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3603))) (let ((.cse0 (select (select .cse2 c_~A~0.base) c_~A~0.offset)) (.cse1 (select (select .cse2 c_~B~0.base) c_~B~0.offset))) (<= (+ .cse0 .cse1 c_~csum~0) (+ (select (select (store .cse2 c_~C~0.base (store (select .cse2 c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~B~0.base) c_~B~0.offset) c_~asum~0 c_~bsum~0))))) (forall ((~C~0.offset Int) (v_ArrVal_3602 (Array Int Int)) (v_ArrVal_3603 (Array Int Int))) (let ((.cse3 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3602) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3603))) (let ((.cse4 (select (select .cse3 c_~A~0.base) c_~A~0.offset)) (.cse5 (select (select .cse3 c_~B~0.base) c_~B~0.offset))) (<= (+ (select (select (store .cse3 c_~C~0.base (store (select .cse3 c_~C~0.base) ~C~0.offset (+ .cse4 .cse5))) c_~B~0.base) c_~B~0.offset) c_~asum~0 c_~bsum~0) (+ .cse4 .cse5 c_~csum~0)))))) is different from false [2023-01-28 10:19:25,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:19:25,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116870 treesize of output 105254 [2023-01-28 10:19:25,832 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:19:25,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4598 treesize of output 4350 [2023-01-28 10:19:25,894 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:19:25,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4558 treesize of output 4438 Received shutdown request... [2023-01-28 10:28:51,320 WARN L238 SmtUtils]: Removed 2 from assertion stack [2023-01-28 10:28:51,323 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-01-28 10:28:51,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-01-28 10:28:51,344 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 10:28:51,351 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 10:28:51,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-01-28 10:28:51,524 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 29 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 21 for 7ms.. [2023-01-28 10:28:51,526 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-01-28 10:28:51,526 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-01-28 10:28:51,526 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-01-28 10:28:51,526 INFO L445 BasicCegarLoop]: Path program histogram: [49, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:28:51,529 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 10:28:51,529 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 10:28:51,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 10:28:51 BasicIcfg [2023-01-28 10:28:51,530 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 10:28:51,530 INFO L158 Benchmark]: Toolchain (without parser) took 833755.71ms. Allocated memory was 534.8MB in the beginning and 6.8GB in the end (delta: 6.2GB). Free memory was 495.3MB in the beginning and 4.0GB in the end (delta: -3.5GB). Peak memory consumption was 5.6GB. Max. memory is 16.0GB. [2023-01-28 10:28:51,531 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 352.3MB. Free memory is still 301.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 10:28:51,531 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.05ms. Allocated memory is still 534.8MB. Free memory was 494.9MB in the beginning and 483.4MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 10:28:51,531 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.50ms. Allocated memory is still 534.8MB. Free memory was 483.4MB in the beginning and 480.6MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-01-28 10:28:51,531 INFO L158 Benchmark]: Boogie Preprocessor took 21.11ms. Allocated memory is still 534.8MB. Free memory was 480.6MB in the beginning and 478.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 10:28:51,531 INFO L158 Benchmark]: RCFGBuilder took 537.40ms. Allocated memory is still 534.8MB. Free memory was 478.5MB in the beginning and 453.9MB in the end (delta: 24.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2023-01-28 10:28:51,531 INFO L158 Benchmark]: TraceAbstraction took 832945.88ms. Allocated memory was 534.8MB in the beginning and 6.8GB in the end (delta: 6.2GB). Free memory was 453.3MB in the beginning and 4.0GB in the end (delta: -3.5GB). Peak memory consumption was 5.6GB. Max. memory is 16.0GB. [2023-01-28 10:28:51,531 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 352.3MB. Free memory is still 301.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 203.05ms. Allocated memory is still 534.8MB. Free memory was 494.9MB in the beginning and 483.4MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 44.50ms. Allocated memory is still 534.8MB. Free memory was 483.4MB in the beginning and 480.6MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 21.11ms. Allocated memory is still 534.8MB. Free memory was 480.6MB in the beginning and 478.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 537.40ms. Allocated memory is still 534.8MB. Free memory was 478.5MB in the beginning and 453.9MB in the end (delta: 24.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * TraceAbstraction took 832945.88ms. Allocated memory was 534.8MB in the beginning and 6.8GB in the end (delta: 6.2GB). Free memory was 453.3MB in the beginning and 4.0GB in the end (delta: -3.5GB). Peak memory consumption was 5.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.3s, 289 PlacesBefore, 32 PlacesAfterwards, 308 TransitionsBefore, 28 TransitionsAfterwards, 12810 CoEnabledTransitionPairs, 8 FixpointIterations, 140 TrivialSequentialCompositions, 117 ConcurrentSequentialCompositions, 41 TrivialYvCompositions, 40 ConcurrentYvCompositions, 23 ChoiceCompositions, 361 TotalNumberOfCompositions, 12315 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 11718, independent: 11663, independent conditional: 0, independent unconditional: 11663, dependent: 55, dependent conditional: 0, dependent unconditional: 55, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 7585, independent: 7545, independent conditional: 0, independent unconditional: 7545, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 11718, independent: 4118, independent conditional: 0, independent unconditional: 4118, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 7585, unknown conditional: 0, unknown unconditional: 7585] , Statistics on independence cache: Total cache size (in pairs): 59, Positive cache size: 54, Positive conditional cache size: 0, Positive unconditional cache size: 54, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 29 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 21 for 7ms.. - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 29 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 21 for 7ms.. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 29 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 21 for 7ms.. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 29 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 21 for 7ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 410 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 832.8s, OverallIterations: 56, TraceHistogramMax: 1, PathProgramHistogramMax: 49, EmptinessCheckTime: 0.0s, AutomataDifference: 109.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.4s, HoareTripleCheckerStatistics: 62 mSolverCounterUnknown, 5204 SdHoareTripleChecker+Valid, 20.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5204 mSDsluCounter, 2924 SdHoareTripleChecker+Invalid, 17.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2101 IncrementalHoareTripleChecker+Unchecked, 2568 mSDsCounter, 433 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 37800 IncrementalHoareTripleChecker+Invalid, 40396 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 433 mSolverCounterUnsat, 356 mSDtfsCounter, 37800 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3626 GetRequests, 2046 SyntacticMatches, 138 SemanticMatches, 1442 ConstructedPredicates, 20 IntricatePredicates, 2 DeprecatedPredicates, 11559 ImplicationChecksByTransitivity, 56.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19126occurred in iteration=55, InterpolantAutomatonStates: 620, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 125.3s InterpolantComputationTime, 2937 NumberOfCodeBlocks, 2937 NumberOfCodeBlocksAsserted, 152 NumberOfCheckSat, 4203 ConstructedInterpolants, 292 QuantifiedInterpolants, 98621 SizeOfPredicates, 1327 NumberOfNonLiveVariables, 18747 ConjunctsInSsa, 4018 ConjunctsInUnsatCore, 157 InterpolantComputations, 7 PerfectInterpolantSequences, 441/906 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown