/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-counter-fun.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 10:25:20,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 10:25:20,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 10:25:20,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 10:25:20,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 10:25:20,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 10:25:20,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 10:25:20,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 10:25:20,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 10:25:20,885 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 10:25:20,886 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 10:25:20,886 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 10:25:20,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 10:25:20,887 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 10:25:20,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 10:25:20,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 10:25:20,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 10:25:20,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 10:25:20,890 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 10:25:20,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 10:25:20,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 10:25:20,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 10:25:20,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 10:25:20,900 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 10:25:20,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 10:25:20,909 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 10:25:20,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 10:25:20,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 10:25:20,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 10:25:20,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 10:25:20,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 10:25:20,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 10:25:20,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 10:25:20,912 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 10:25:20,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 10:25:20,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 10:25:20,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 10:25:20,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 10:25:20,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 10:25:20,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 10:25:20,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 10:25:20,917 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 10:25:20,939 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 10:25:20,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 10:25:20,940 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 10:25:20,940 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 10:25:20,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 10:25:20,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 10:25:20,941 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 10:25:20,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 10:25:20,941 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 10:25:20,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 10:25:20,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 10:25:20,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 10:25:20,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 10:25:20,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 10:25:20,942 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 10:25:20,942 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 10:25:20,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 10:25:20,942 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 10:25:20,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 10:25:20,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 10:25:20,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 10:25:20,942 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 10:25:20,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 10:25:20,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 10:25:20,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 10:25:20,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 10:25:20,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 10:25:20,943 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 10:25:20,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 10:25:20,943 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 10:25:20,943 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 10:25:20,943 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 10:25:21,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 10:25:21,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 10:25:21,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 10:25:21,162 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 10:25:21,163 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 10:25:21,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-01-28 10:25:22,108 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 10:25:22,271 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 10:25:22,272 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-01-28 10:25:22,277 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76052b36e/3d6a3056fb504e8c9405405ede9405bd/FLAG6f9188a49 [2023-01-28 10:25:22,289 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76052b36e/3d6a3056fb504e8c9405405ede9405bd [2023-01-28 10:25:22,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 10:25:22,292 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 10:25:22,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 10:25:22,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 10:25:22,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 10:25:22,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 10:25:22" (1/1) ... [2023-01-28 10:25:22,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55858107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:25:22, skipping insertion in model container [2023-01-28 10:25:22,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 10:25:22" (1/1) ... [2023-01-28 10:25:22,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 10:25:22,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 10:25:22,442 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-counter-fun.wvr.c[2681,2694] [2023-01-28 10:25:22,450 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 10:25:22,456 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 10:25:22,476 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-counter-fun.wvr.c[2681,2694] [2023-01-28 10:25:22,478 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 10:25:22,483 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 10:25:22,483 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 10:25:22,490 INFO L208 MainTranslator]: Completed translation [2023-01-28 10:25:22,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:25:22 WrapperNode [2023-01-28 10:25:22,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 10:25:22,492 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 10:25:22,492 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 10:25:22,493 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 10:25:22,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:25:22" (1/1) ... [2023-01-28 10:25:22,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:25:22" (1/1) ... [2023-01-28 10:25:22,537 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 198 [2023-01-28 10:25:22,537 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 10:25:22,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 10:25:22,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 10:25:22,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 10:25:22,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:25:22" (1/1) ... [2023-01-28 10:25:22,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:25:22" (1/1) ... [2023-01-28 10:25:22,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:25:22" (1/1) ... [2023-01-28 10:25:22,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:25:22" (1/1) ... [2023-01-28 10:25:22,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:25:22" (1/1) ... [2023-01-28 10:25:22,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:25:22" (1/1) ... [2023-01-28 10:25:22,568 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:25:22" (1/1) ... [2023-01-28 10:25:22,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:25:22" (1/1) ... [2023-01-28 10:25:22,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 10:25:22,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 10:25:22,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 10:25:22,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 10:25:22,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:25:22" (1/1) ... [2023-01-28 10:25:22,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 10:25:22,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:25:22,602 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 10:25:22,620 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 10:25:22,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 10:25:22,630 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 10:25:22,630 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 10:25:22,630 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 10:25:22,630 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 10:25:22,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 10:25:22,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 10:25:22,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 10:25:22,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 10:25:22,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 10:25:22,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 10:25:22,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 10:25:22,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 10:25:22,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 10:25:22,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 10:25:22,633 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 10:25:22,757 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 10:25:22,758 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 10:25:22,978 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 10:25:23,076 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 10:25:23,076 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-01-28 10:25:23,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 10:25:23 BoogieIcfgContainer [2023-01-28 10:25:23,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 10:25:23,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 10:25:23,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 10:25:23,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 10:25:23,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 10:25:22" (1/3) ... [2023-01-28 10:25:23,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b69afcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 10:25:23, skipping insertion in model container [2023-01-28 10:25:23,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:25:22" (2/3) ... [2023-01-28 10:25:23,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b69afcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 10:25:23, skipping insertion in model container [2023-01-28 10:25:23,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 10:25:23" (3/3) ... [2023-01-28 10:25:23,085 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2023-01-28 10:25:23,097 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 10:25:23,097 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 10:25:23,097 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 10:25:23,131 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 10:25:23,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 155 transitions, 326 flow [2023-01-28 10:25:23,242 INFO L130 PetriNetUnfolder]: 13/153 cut-off events. [2023-01-28 10:25:23,242 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 10:25:23,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 153 events. 13/153 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 87 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2023-01-28 10:25:23,246 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 155 transitions, 326 flow [2023-01-28 10:25:23,257 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 145 transitions, 302 flow [2023-01-28 10:25:23,260 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 10:25:23,275 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 139 places, 145 transitions, 302 flow [2023-01-28 10:25:23,280 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 139 places, 145 transitions, 302 flow [2023-01-28 10:25:23,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 145 transitions, 302 flow [2023-01-28 10:25:23,315 INFO L130 PetriNetUnfolder]: 13/145 cut-off events. [2023-01-28 10:25:23,315 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 10:25:23,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 145 events. 13/145 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 86 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2023-01-28 10:25:23,318 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-01-28 10:25:27,411 INFO L134 LiptonReduction]: Checked pairs total: 553 [2023-01-28 10:25:27,411 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-01-28 10:25:27,426 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 10:25:27,430 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;@4fd51073, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 10:25:27,430 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 10:25:27,435 INFO L130 PetriNetUnfolder]: 4/18 cut-off events. [2023-01-28 10:25:27,435 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 10:25:27,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:27,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:27,435 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:27,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:27,438 INFO L85 PathProgramCache]: Analyzing trace with hash -511726821, now seen corresponding path program 1 times [2023-01-28 10:25:27,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:27,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852464632] [2023-01-28 10:25:27,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:27,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:27,801 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 10:25:27,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:27,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852464632] [2023-01-28 10:25:27,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852464632] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:25:27,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:25:27,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 10:25:27,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7281786] [2023-01-28 10:25:27,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:25:27,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 10:25:27,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:27,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 10:25:27,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 10:25:27,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 305 [2023-01-28 10:25:27,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:27,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:27,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 305 [2023-01-28 10:25:27,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:27,896 INFO L130 PetriNetUnfolder]: 67/118 cut-off events. [2023-01-28 10:25:27,896 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-01-28 10:25:27,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 118 events. 67/118 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 329 event pairs, 9 based on Foata normal form. 1/76 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-01-28 10:25:27,898 INFO L137 encePairwiseOnDemand]: 301/305 looper letters, 23 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2023-01-28 10:25:27,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 133 flow [2023-01-28 10:25:27,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 10:25:27,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 10:25:27,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2023-01-28 10:25:27,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47978142076502733 [2023-01-28 10:25:27,908 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2023-01-28 10:25:27,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2023-01-28 10:25:27,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:27,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2023-01-28 10:25:27,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:27,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:27,918 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:27,919 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 439 transitions. [2023-01-28 10:25:27,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 133 flow [2023-01-28 10:25:27,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 29 transitions, 119 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 10:25:27,921 INFO L231 Difference]: Finished difference. Result has 21 places, 21 transitions, 61 flow [2023-01-28 10:25:27,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=21, PETRI_TRANSITIONS=21} [2023-01-28 10:25:27,924 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-01-28 10:25:27,924 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 21 transitions, 61 flow [2023-01-28 10:25:27,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:27,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:27,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:27,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 10:25:27,925 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:27,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:27,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1737231503, now seen corresponding path program 1 times [2023-01-28 10:25:27,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:27,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664099849] [2023-01-28 10:25:27,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:27,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:28,017 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 10:25:28,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:28,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664099849] [2023-01-28 10:25:28,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664099849] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:25:28,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:25:28,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:25:28,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117693272] [2023-01-28 10:25:28,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:25:28,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 10:25:28,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:28,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 10:25:28,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 10:25:28,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:25:28,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 61 flow. Second operand has 5 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:28,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:28,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:25:28,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:28,105 INFO L130 PetriNetUnfolder]: 94/179 cut-off events. [2023-01-28 10:25:28,105 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-01-28 10:25:28,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 179 events. 94/179 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 576 event pairs, 26 based on Foata normal form. 4/181 useless extension candidates. Maximal degree in co-relation 144. Up to 88 conditions per place. [2023-01-28 10:25:28,107 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 34 selfloop transitions, 4 changer transitions 8/46 dead transitions. [2023-01-28 10:25:28,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 46 transitions, 223 flow [2023-01-28 10:25:28,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:25:28,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:25:28,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 678 transitions. [2023-01-28 10:25:28,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44459016393442624 [2023-01-28 10:25:28,112 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 678 transitions. [2023-01-28 10:25:28,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 678 transitions. [2023-01-28 10:25:28,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:28,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 678 transitions. [2023-01-28 10:25:28,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:28,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:28,118 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:28,118 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 61 flow. Second operand 5 states and 678 transitions. [2023-01-28 10:25:28,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 46 transitions, 223 flow [2023-01-28 10:25:28,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 46 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 10:25:28,120 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 85 flow [2023-01-28 10:25:28,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=85, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-01-28 10:25:28,120 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2023-01-28 10:25:28,121 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 85 flow [2023-01-28 10:25:28,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:28,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:28,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:28,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 10:25:28,122 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:28,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:28,123 INFO L85 PathProgramCache]: Analyzing trace with hash -940242461, now seen corresponding path program 1 times [2023-01-28 10:25:28,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:28,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711631076] [2023-01-28 10:25:28,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:28,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:25:28,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:28,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711631076] [2023-01-28 10:25:28,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711631076] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:25:28,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764885529] [2023-01-28 10:25:28,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:28,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:28,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:25:28,216 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 10:25:28,246 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 10:25:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:28,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:25:28,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:25:28,367 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 10:25:28,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 10:25:28,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764885529] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:25:28,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 10:25:28,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-01-28 10:25:28,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795364706] [2023-01-28 10:25:28,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:25:28,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 10:25:28,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:28,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 10:25:28,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-01-28 10:25:28,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 305 [2023-01-28 10:25:28,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 115.5) internal successors, (462), 4 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:28,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:28,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 305 [2023-01-28 10:25:28,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:28,435 INFO L130 PetriNetUnfolder]: 91/206 cut-off events. [2023-01-28 10:25:28,435 INFO L131 PetriNetUnfolder]: For 234/256 co-relation queries the response was YES. [2023-01-28 10:25:28,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569 conditions, 206 events. 91/206 cut-off events. For 234/256 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 859 event pairs, 60 based on Foata normal form. 44/240 useless extension candidates. Maximal degree in co-relation 451. Up to 132 conditions per place. [2023-01-28 10:25:28,436 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 20 selfloop transitions, 2 changer transitions 23/47 dead transitions. [2023-01-28 10:25:28,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 47 transitions, 239 flow [2023-01-28 10:25:28,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:25:28,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:25:28,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 605 transitions. [2023-01-28 10:25:28,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39672131147540984 [2023-01-28 10:25:28,438 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 605 transitions. [2023-01-28 10:25:28,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 605 transitions. [2023-01-28 10:25:28,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:28,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 605 transitions. [2023-01-28 10:25:28,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:28,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:28,442 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:28,442 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 85 flow. Second operand 5 states and 605 transitions. [2023-01-28 10:25:28,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 47 transitions, 239 flow [2023-01-28 10:25:28,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 47 transitions, 230 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-01-28 10:25:28,444 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 98 flow [2023-01-28 10:25:28,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-01-28 10:25:28,444 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 9 predicate places. [2023-01-28 10:25:28,444 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 98 flow [2023-01-28 10:25:28,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 115.5) internal successors, (462), 4 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:28,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:28,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:28,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 10:25:28,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:28,649 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:28,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:28,649 INFO L85 PathProgramCache]: Analyzing trace with hash 166324188, now seen corresponding path program 1 times [2023-01-28 10:25:28,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:28,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733762086] [2023-01-28 10:25:28,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:28,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:25:28,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:28,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733762086] [2023-01-28 10:25:28,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733762086] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:25:28,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:25:28,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:25:28,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496286895] [2023-01-28 10:25:28,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:25:28,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 10:25:28,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:28,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 10:25:28,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 10:25:28,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:25:28,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 130.4) internal successors, (652), 5 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:28,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:28,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:25:28,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:28,790 INFO L130 PetriNetUnfolder]: 114/218 cut-off events. [2023-01-28 10:25:28,790 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2023-01-28 10:25:28,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 218 events. 114/218 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 695 event pairs, 40 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 618. Up to 133 conditions per place. [2023-01-28 10:25:28,793 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 38 selfloop transitions, 7 changer transitions 10/55 dead transitions. [2023-01-28 10:25:28,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 55 transitions, 335 flow [2023-01-28 10:25:28,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 10:25:28,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 10:25:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 810 transitions. [2023-01-28 10:25:28,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426229508196721 [2023-01-28 10:25:28,795 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 810 transitions. [2023-01-28 10:25:28,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 810 transitions. [2023-01-28 10:25:28,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:28,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 810 transitions. [2023-01-28 10:25:28,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:28,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 305.0) internal successors, (2135), 7 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:28,800 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 305.0) internal successors, (2135), 7 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:28,800 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 98 flow. Second operand 6 states and 810 transitions. [2023-01-28 10:25:28,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 55 transitions, 335 flow [2023-01-28 10:25:28,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 317 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-01-28 10:25:28,803 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 150 flow [2023-01-28 10:25:28,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=150, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-01-28 10:25:28,804 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2023-01-28 10:25:28,804 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 150 flow [2023-01-28 10:25:28,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.4) internal successors, (652), 5 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:28,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:28,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:28,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 10:25:28,805 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:28,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:28,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1772606940, now seen corresponding path program 2 times [2023-01-28 10:25:28,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:28,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717983078] [2023-01-28 10:25:28,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:28,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:25:28,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:28,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717983078] [2023-01-28 10:25:28,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717983078] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:25:28,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:25:28,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:25:28,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831026611] [2023-01-28 10:25:28,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:25:28,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 10:25:28,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:28,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 10:25:28,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 10:25:28,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:25:28,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 130.4) internal successors, (652), 5 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:28,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:28,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:25:28,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:28,970 INFO L130 PetriNetUnfolder]: 117/224 cut-off events. [2023-01-28 10:25:28,970 INFO L131 PetriNetUnfolder]: For 346/346 co-relation queries the response was YES. [2023-01-28 10:25:28,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 810 conditions, 224 events. 117/224 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 743 event pairs, 38 based on Foata normal form. 4/226 useless extension candidates. Maximal degree in co-relation 786. Up to 125 conditions per place. [2023-01-28 10:25:28,971 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 45 selfloop transitions, 9 changer transitions 1/55 dead transitions. [2023-01-28 10:25:28,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 55 transitions, 371 flow [2023-01-28 10:25:28,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:25:28,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:25:28,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 683 transitions. [2023-01-28 10:25:28,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478688524590164 [2023-01-28 10:25:28,973 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 683 transitions. [2023-01-28 10:25:28,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 683 transitions. [2023-01-28 10:25:28,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:28,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 683 transitions. [2023-01-28 10:25:28,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:28,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:28,976 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:28,976 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 150 flow. Second operand 5 states and 683 transitions. [2023-01-28 10:25:28,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 55 transitions, 371 flow [2023-01-28 10:25:28,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 55 transitions, 341 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-01-28 10:25:28,978 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 185 flow [2023-01-28 10:25:28,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-01-28 10:25:28,979 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 17 predicate places. [2023-01-28 10:25:28,979 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 185 flow [2023-01-28 10:25:28,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.4) internal successors, (652), 5 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:28,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:28,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:28,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 10:25:28,979 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:28,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:28,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1182769632, now seen corresponding path program 1 times [2023-01-28 10:25:28,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:28,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379006055] [2023-01-28 10:25:28,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:28,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:25:29,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:29,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379006055] [2023-01-28 10:25:29,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379006055] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:25:29,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690745453] [2023-01-28 10:25:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:29,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:29,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:25:29,027 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 10:25:29,029 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 10:25:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:29,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:25:29,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:25:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:25:29,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 10:25:29,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690745453] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:25:29,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 10:25:29,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-01-28 10:25:29,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871443303] [2023-01-28 10:25:29,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:25:29,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 10:25:29,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:29,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 10:25:29,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-01-28 10:25:29,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 305 [2023-01-28 10:25:29,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:29,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:29,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 305 [2023-01-28 10:25:29,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:29,173 INFO L130 PetriNetUnfolder]: 119/249 cut-off events. [2023-01-28 10:25:29,174 INFO L131 PetriNetUnfolder]: For 633/648 co-relation queries the response was YES. [2023-01-28 10:25:29,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 907 conditions, 249 events. 119/249 cut-off events. For 633/648 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 968 event pairs, 67 based on Foata normal form. 22/256 useless extension candidates. Maximal degree in co-relation 882. Up to 202 conditions per place. [2023-01-28 10:25:29,175 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 28 selfloop transitions, 2 changer transitions 10/44 dead transitions. [2023-01-28 10:25:29,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 44 transitions, 303 flow [2023-01-28 10:25:29,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 10:25:29,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 10:25:29,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 486 transitions. [2023-01-28 10:25:29,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983606557377049 [2023-01-28 10:25:29,176 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 486 transitions. [2023-01-28 10:25:29,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 486 transitions. [2023-01-28 10:25:29,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:29,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 486 transitions. [2023-01-28 10:25:29,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:29,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:29,179 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:29,179 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 185 flow. Second operand 4 states and 486 transitions. [2023-01-28 10:25:29,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 44 transitions, 303 flow [2023-01-28 10:25:29,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 10:25:29,181 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 202 flow [2023-01-28 10:25:29,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-01-28 10:25:29,181 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 21 predicate places. [2023-01-28 10:25:29,181 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 202 flow [2023-01-28 10:25:29,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:29,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:29,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:29,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 10:25:29,382 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 10:25:29,382 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:29,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:29,383 INFO L85 PathProgramCache]: Analyzing trace with hash -919263952, now seen corresponding path program 1 times [2023-01-28 10:25:29,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:29,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186780861] [2023-01-28 10:25:29,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:29,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:25:29,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:29,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186780861] [2023-01-28 10:25:29,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186780861] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:25:29,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:25:29,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:25:29,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679387874] [2023-01-28 10:25:29,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:25:29,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 10:25:29,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:29,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 10:25:29,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 10:25:29,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:25:29,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:29,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:29,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:25:29,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:29,501 INFO L130 PetriNetUnfolder]: 105/203 cut-off events. [2023-01-28 10:25:29,501 INFO L131 PetriNetUnfolder]: For 383/383 co-relation queries the response was YES. [2023-01-28 10:25:29,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 203 events. 105/203 cut-off events. For 383/383 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 643 event pairs, 36 based on Foata normal form. 6/208 useless extension candidates. Maximal degree in co-relation 733. Up to 124 conditions per place. [2023-01-28 10:25:29,502 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 35 selfloop transitions, 9 changer transitions 8/52 dead transitions. [2023-01-28 10:25:29,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 381 flow [2023-01-28 10:25:29,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:25:29,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:25:29,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 679 transitions. [2023-01-28 10:25:29,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44524590163934424 [2023-01-28 10:25:29,504 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 679 transitions. [2023-01-28 10:25:29,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 679 transitions. [2023-01-28 10:25:29,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:29,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 679 transitions. [2023-01-28 10:25:29,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:29,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:29,508 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:29,508 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 202 flow. Second operand 5 states and 679 transitions. [2023-01-28 10:25:29,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 381 flow [2023-01-28 10:25:29,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 365 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-01-28 10:25:29,512 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 211 flow [2023-01-28 10:25:29,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2023-01-28 10:25:29,513 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 23 predicate places. [2023-01-28 10:25:29,513 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 211 flow [2023-01-28 10:25:29,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:29,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:29,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:29,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 10:25:29,514 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:29,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:29,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1922624012, now seen corresponding path program 2 times [2023-01-28 10:25:29,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:29,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935717531] [2023-01-28 10:25:29,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:29,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:25:29,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:29,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935717531] [2023-01-28 10:25:29,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935717531] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:25:29,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735965639] [2023-01-28 10:25:29,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:25:29,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:29,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:25:29,573 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 10:25:29,575 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 10:25:29,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:25:29,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:25:29,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 10:25:29,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:25:29,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:25:29,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:25:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:25:29,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735965639] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:25:29,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:25:29,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-28 10:25:29,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746397619] [2023-01-28 10:25:29,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:25:29,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 10:25:29,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:29,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 10:25:29,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-01-28 10:25:29,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:25:29,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 211 flow. Second operand has 8 states, 8 states have (on average 130.0) internal successors, (1040), 8 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:29,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:29,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:25:29,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:29,786 INFO L130 PetriNetUnfolder]: 104/195 cut-off events. [2023-01-28 10:25:29,786 INFO L131 PetriNetUnfolder]: For 436/436 co-relation queries the response was YES. [2023-01-28 10:25:29,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 771 conditions, 195 events. 104/195 cut-off events. For 436/436 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 567 event pairs, 16 based on Foata normal form. 4/198 useless extension candidates. Maximal degree in co-relation 743. Up to 92 conditions per place. [2023-01-28 10:25:29,787 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 43 selfloop transitions, 8 changer transitions 1/52 dead transitions. [2023-01-28 10:25:29,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 402 flow [2023-01-28 10:25:29,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:25:29,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:25:29,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 675 transitions. [2023-01-28 10:25:29,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426229508196721 [2023-01-28 10:25:29,789 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 675 transitions. [2023-01-28 10:25:29,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 675 transitions. [2023-01-28 10:25:29,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:29,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 675 transitions. [2023-01-28 10:25:29,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:29,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:29,792 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:29,792 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 211 flow. Second operand 5 states and 675 transitions. [2023-01-28 10:25:29,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 402 flow [2023-01-28 10:25:29,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 372 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-01-28 10:25:29,794 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 233 flow [2023-01-28 10:25:29,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2023-01-28 10:25:29,794 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2023-01-28 10:25:29,795 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 233 flow [2023-01-28 10:25:29,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 130.0) internal successors, (1040), 8 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:29,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:29,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:29,801 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 10:25:30,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:30,004 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:30,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:30,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1388345664, now seen corresponding path program 1 times [2023-01-28 10:25:30,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:30,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799636485] [2023-01-28 10:25:30,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:30,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:25:30,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:30,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799636485] [2023-01-28 10:25:30,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799636485] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:25:30,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124378641] [2023-01-28 10:25:30,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:30,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:30,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:25:30,048 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 10:25:30,050 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 10:25:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:30,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 10:25:30,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:25:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:25:30,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:25:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:25:30,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124378641] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:25:30,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:25:30,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-28 10:25:30,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192396242] [2023-01-28 10:25:30,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:25:30,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 10:25:30,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:30,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 10:25:30,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-01-28 10:25:30,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:25:30,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 233 flow. Second operand has 8 states, 8 states have (on average 130.125) internal successors, (1041), 8 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:30,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:30,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:25:30,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:30,246 INFO L130 PetriNetUnfolder]: 112/209 cut-off events. [2023-01-28 10:25:30,247 INFO L131 PetriNetUnfolder]: For 474/474 co-relation queries the response was YES. [2023-01-28 10:25:30,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 826 conditions, 209 events. 112/209 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 624 event pairs, 20 based on Foata normal form. 6/214 useless extension candidates. Maximal degree in co-relation 796. Up to 102 conditions per place. [2023-01-28 10:25:30,248 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 46 selfloop transitions, 11 changer transitions 1/58 dead transitions. [2023-01-28 10:25:30,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 437 flow [2023-01-28 10:25:30,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:25:30,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:25:30,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 679 transitions. [2023-01-28 10:25:30,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44524590163934424 [2023-01-28 10:25:30,249 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 679 transitions. [2023-01-28 10:25:30,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 679 transitions. [2023-01-28 10:25:30,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:30,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 679 transitions. [2023-01-28 10:25:30,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:30,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:30,253 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:30,253 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 233 flow. Second operand 5 states and 679 transitions. [2023-01-28 10:25:30,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 437 flow [2023-01-28 10:25:30,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 58 transitions, 424 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-01-28 10:25:30,255 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 273 flow [2023-01-28 10:25:30,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2023-01-28 10:25:30,255 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 29 predicate places. [2023-01-28 10:25:30,255 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 273 flow [2023-01-28 10:25:30,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 130.125) internal successors, (1041), 8 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:30,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:30,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:30,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 10:25:30,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:30,460 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:30,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:30,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1906605968, now seen corresponding path program 2 times [2023-01-28 10:25:30,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:30,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584520914] [2023-01-28 10:25:30,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:30,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:25:30,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:30,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584520914] [2023-01-28 10:25:30,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584520914] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:25:30,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644234087] [2023-01-28 10:25:30,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:25:30,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:30,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:25:30,510 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 10:25:30,512 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 10:25:30,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:25:30,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:25:30,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 10:25:30,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:25:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:25:30,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:25:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:25:30,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644234087] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:25:30,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:25:30,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-01-28 10:25:30,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876850517] [2023-01-28 10:25:30,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:25:30,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 10:25:30,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:30,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 10:25:30,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-01-28 10:25:30,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:25:30,669 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 273 flow. Second operand has 10 states, 10 states have (on average 129.7) internal successors, (1297), 10 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:30,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:30,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:25:30,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:30,783 INFO L130 PetriNetUnfolder]: 128/237 cut-off events. [2023-01-28 10:25:30,784 INFO L131 PetriNetUnfolder]: For 733/733 co-relation queries the response was YES. [2023-01-28 10:25:30,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 994 conditions, 237 events. 128/237 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 746 event pairs, 20 based on Foata normal form. 6/242 useless extension candidates. Maximal degree in co-relation 962. Up to 112 conditions per place. [2023-01-28 10:25:30,785 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 54 selfloop transitions, 16 changer transitions 1/71 dead transitions. [2023-01-28 10:25:30,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 544 flow [2023-01-28 10:25:30,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 10:25:30,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 10:25:30,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1075 transitions. [2023-01-28 10:25:30,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4405737704918033 [2023-01-28 10:25:30,787 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1075 transitions. [2023-01-28 10:25:30,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1075 transitions. [2023-01-28 10:25:30,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:30,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1075 transitions. [2023-01-28 10:25:30,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 134.375) internal successors, (1075), 8 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:30,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:30,792 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:30,792 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 273 flow. Second operand 8 states and 1075 transitions. [2023-01-28 10:25:30,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 544 flow [2023-01-28 10:25:30,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 71 transitions, 530 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-01-28 10:25:30,794 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 326 flow [2023-01-28 10:25:30,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=326, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2023-01-28 10:25:30,795 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 36 predicate places. [2023-01-28 10:25:30,795 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 326 flow [2023-01-28 10:25:30,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 129.7) internal successors, (1297), 10 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:30,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:30,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:30,801 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 10:25:30,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-01-28 10:25:31,002 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:31,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:31,002 INFO L85 PathProgramCache]: Analyzing trace with hash 694440902, now seen corresponding path program 3 times [2023-01-28 10:25:31,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:31,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49808641] [2023-01-28 10:25:31,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:31,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:25:31,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:31,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49808641] [2023-01-28 10:25:31,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49808641] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:25:31,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:25:31,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:25:31,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199490361] [2023-01-28 10:25:31,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:25:31,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 10:25:31,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:31,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 10:25:31,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 10:25:31,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:25:31,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 326 flow. Second operand has 5 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:31,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:31,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:25:31,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:31,143 INFO L130 PetriNetUnfolder]: 118/217 cut-off events. [2023-01-28 10:25:31,143 INFO L131 PetriNetUnfolder]: For 909/909 co-relation queries the response was YES. [2023-01-28 10:25:31,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1004 conditions, 217 events. 118/217 cut-off events. For 909/909 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 643 event pairs, 36 based on Foata normal form. 4/220 useless extension candidates. Maximal degree in co-relation 970. Up to 140 conditions per place. [2023-01-28 10:25:31,144 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 38 selfloop transitions, 13 changer transitions 1/52 dead transitions. [2023-01-28 10:25:31,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 52 transitions, 470 flow [2023-01-28 10:25:31,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:25:31,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:25:31,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 672 transitions. [2023-01-28 10:25:31,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44065573770491806 [2023-01-28 10:25:31,146 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 672 transitions. [2023-01-28 10:25:31,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 672 transitions. [2023-01-28 10:25:31,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:31,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 672 transitions. [2023-01-28 10:25:31,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.4) internal successors, (672), 5 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:31,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:31,149 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:31,149 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 326 flow. Second operand 5 states and 672 transitions. [2023-01-28 10:25:31,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 52 transitions, 470 flow [2023-01-28 10:25:31,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 52 transitions, 436 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-01-28 10:25:31,152 INFO L231 Difference]: Finished difference. Result has 57 places, 40 transitions, 304 flow [2023-01-28 10:25:31,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=57, PETRI_TRANSITIONS=40} [2023-01-28 10:25:31,152 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 35 predicate places. [2023-01-28 10:25:31,152 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 40 transitions, 304 flow [2023-01-28 10:25:31,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:31,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:31,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:31,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-28 10:25:31,153 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:31,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:31,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1217746086, now seen corresponding path program 3 times [2023-01-28 10:25:31,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:31,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089661995] [2023-01-28 10:25:31,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:31,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:25:31,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:31,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089661995] [2023-01-28 10:25:31,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089661995] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:25:31,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:25:31,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:25:31,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779614850] [2023-01-28 10:25:31,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:25:31,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 10:25:31,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:31,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 10:25:31,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 10:25:31,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:25:31,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 40 transitions, 304 flow. Second operand has 5 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:31,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:31,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:25:31,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:31,255 INFO L130 PetriNetUnfolder]: 107/192 cut-off events. [2023-01-28 10:25:31,255 INFO L131 PetriNetUnfolder]: For 759/759 co-relation queries the response was YES. [2023-01-28 10:25:31,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 192 events. 107/192 cut-off events. For 759/759 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 547 event pairs, 31 based on Foata normal form. 6/197 useless extension candidates. Maximal degree in co-relation 839. Up to 139 conditions per place. [2023-01-28 10:25:31,256 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 38 selfloop transitions, 12 changer transitions 1/51 dead transitions. [2023-01-28 10:25:31,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 51 transitions, 446 flow [2023-01-28 10:25:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:25:31,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:25:31,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 672 transitions. [2023-01-28 10:25:31,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44065573770491806 [2023-01-28 10:25:31,258 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 672 transitions. [2023-01-28 10:25:31,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 672 transitions. [2023-01-28 10:25:31,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:31,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 672 transitions. [2023-01-28 10:25:31,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.4) internal successors, (672), 5 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:31,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:31,261 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:31,261 INFO L175 Difference]: Start difference. First operand has 57 places, 40 transitions, 304 flow. Second operand 5 states and 672 transitions. [2023-01-28 10:25:31,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 51 transitions, 446 flow [2023-01-28 10:25:31,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 405 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-01-28 10:25:31,263 INFO L231 Difference]: Finished difference. Result has 53 places, 39 transitions, 275 flow [2023-01-28 10:25:31,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=275, PETRI_PLACES=53, PETRI_TRANSITIONS=39} [2023-01-28 10:25:31,264 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 31 predicate places. [2023-01-28 10:25:31,264 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 39 transitions, 275 flow [2023-01-28 10:25:31,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:31,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:31,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:31,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 10:25:31,264 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:31,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:31,265 INFO L85 PathProgramCache]: Analyzing trace with hash -813997192, now seen corresponding path program 1 times [2023-01-28 10:25:31,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:31,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865729972] [2023-01-28 10:25:31,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:31,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:25:31,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:31,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865729972] [2023-01-28 10:25:31,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865729972] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:25:31,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463504929] [2023-01-28 10:25:31,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:31,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:31,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:25:31,391 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 10:25:31,393 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 10:25:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:31,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 10:25:31,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:25:31,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-01-28 10:25:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:25:31,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:25:31,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-01-28 10:25:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:25:31,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463504929] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:25:31,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:25:31,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-01-28 10:25:31,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989958995] [2023-01-28 10:25:31,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:25:31,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 10:25:31,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:31,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 10:25:31,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-01-28 10:25:31,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 305 [2023-01-28 10:25:31,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 39 transitions, 275 flow. Second operand has 11 states, 11 states have (on average 106.45454545454545) internal successors, (1171), 11 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:31,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:31,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 305 [2023-01-28 10:25:31,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:31,720 INFO L130 PetriNetUnfolder]: 265/474 cut-off events. [2023-01-28 10:25:31,720 INFO L131 PetriNetUnfolder]: For 1330/1375 co-relation queries the response was YES. [2023-01-28 10:25:31,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1983 conditions, 474 events. 265/474 cut-off events. For 1330/1375 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1919 event pairs, 25 based on Foata normal form. 25/481 useless extension candidates. Maximal degree in co-relation 1423. Up to 197 conditions per place. [2023-01-28 10:25:31,723 INFO L137 encePairwiseOnDemand]: 298/305 looper letters, 63 selfloop transitions, 31 changer transitions 5/105 dead transitions. [2023-01-28 10:25:31,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 105 transitions, 836 flow [2023-01-28 10:25:31,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 10:25:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 10:25:31,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 899 transitions. [2023-01-28 10:25:31,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3684426229508197 [2023-01-28 10:25:31,725 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 899 transitions. [2023-01-28 10:25:31,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 899 transitions. [2023-01-28 10:25:31,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:31,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 899 transitions. [2023-01-28 10:25:31,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 112.375) internal successors, (899), 8 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:31,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:31,729 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:31,729 INFO L175 Difference]: Start difference. First operand has 53 places, 39 transitions, 275 flow. Second operand 8 states and 899 transitions. [2023-01-28 10:25:31,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 105 transitions, 836 flow [2023-01-28 10:25:31,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 105 transitions, 760 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-01-28 10:25:31,733 INFO L231 Difference]: Finished difference. Result has 57 places, 67 transitions, 594 flow [2023-01-28 10:25:31,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=594, PETRI_PLACES=57, PETRI_TRANSITIONS=67} [2023-01-28 10:25:31,733 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 35 predicate places. [2023-01-28 10:25:31,733 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 67 transitions, 594 flow [2023-01-28 10:25:31,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 106.45454545454545) internal successors, (1171), 11 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:31,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:31,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:31,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 10:25:31,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:31,940 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:31,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:31,941 INFO L85 PathProgramCache]: Analyzing trace with hash 585031802, now seen corresponding path program 2 times [2023-01-28 10:25:31,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:31,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113243053] [2023-01-28 10:25:31,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:31,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:25:32,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:32,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113243053] [2023-01-28 10:25:32,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113243053] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:25:32,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794930565] [2023-01-28 10:25:32,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:25:32,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:32,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:25:32,162 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 10:25:32,164 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 10:25:32,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:25:32,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:25:32,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 10:25:32,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:25:32,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-01-28 10:25:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:25:32,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:25:32,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-01-28 10:25:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:25:32,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794930565] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:25:32,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:25:32,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-01-28 10:25:32,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035328190] [2023-01-28 10:25:32,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:25:32,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 10:25:32,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:32,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 10:25:32,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-01-28 10:25:32,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 305 [2023-01-28 10:25:32,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 67 transitions, 594 flow. Second operand has 11 states, 11 states have (on average 106.45454545454545) internal successors, (1171), 11 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:32,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:32,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 305 [2023-01-28 10:25:32,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:32,541 INFO L130 PetriNetUnfolder]: 651/1159 cut-off events. [2023-01-28 10:25:32,541 INFO L131 PetriNetUnfolder]: For 4169/4249 co-relation queries the response was YES. [2023-01-28 10:25:32,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5153 conditions, 1159 events. 651/1159 cut-off events. For 4169/4249 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5920 event pairs, 108 based on Foata normal form. 47/1170 useless extension candidates. Maximal degree in co-relation 3372. Up to 479 conditions per place. [2023-01-28 10:25:32,547 INFO L137 encePairwiseOnDemand]: 298/305 looper letters, 83 selfloop transitions, 49 changer transitions 20/158 dead transitions. [2023-01-28 10:25:32,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 158 transitions, 1626 flow [2023-01-28 10:25:32,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 10:25:32,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 10:25:32,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 893 transitions. [2023-01-28 10:25:32,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36598360655737705 [2023-01-28 10:25:32,549 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 893 transitions. [2023-01-28 10:25:32,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 893 transitions. [2023-01-28 10:25:32,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:32,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 893 transitions. [2023-01-28 10:25:32,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 111.625) internal successors, (893), 8 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:32,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:32,553 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:32,553 INFO L175 Difference]: Start difference. First operand has 57 places, 67 transitions, 594 flow. Second operand 8 states and 893 transitions. [2023-01-28 10:25:32,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 158 transitions, 1626 flow [2023-01-28 10:25:32,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 158 transitions, 1568 flow, removed 28 selfloop flow, removed 1 redundant places. [2023-01-28 10:25:32,561 INFO L231 Difference]: Finished difference. Result has 68 places, 105 transitions, 1193 flow [2023-01-28 10:25:32,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1193, PETRI_PLACES=68, PETRI_TRANSITIONS=105} [2023-01-28 10:25:32,561 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 46 predicate places. [2023-01-28 10:25:32,561 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 105 transitions, 1193 flow [2023-01-28 10:25:32,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 106.45454545454545) internal successors, (1171), 11 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:32,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:32,562 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:32,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-01-28 10:25:32,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:32,769 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:32,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:32,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1194162893, now seen corresponding path program 3 times [2023-01-28 10:25:32,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:32,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008223666] [2023-01-28 10:25:32,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:32,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:32,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:33,092 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 10:25:33,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:33,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008223666] [2023-01-28 10:25:33,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008223666] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:25:33,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623390228] [2023-01-28 10:25:33,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:25:33,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:33,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:25:33,094 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 10:25:33,096 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 10:25:33,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:25:33,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:25:33,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 10:25:33,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:25:33,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 11 [2023-01-28 10:25:33,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 10:25:33,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:25:33,370 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-01-28 10:25:33,370 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 41 [2023-01-28 10:25:33,379 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 24 treesize of output 18 [2023-01-28 10:25:33,452 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 10:25:33,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-01-28 10:25:33,457 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 10:25:33,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:25:33,690 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:25:33,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 132 treesize of output 84 [2023-01-28 10:25:33,721 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:25:33,722 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 228 treesize of output 277 [2023-01-28 10:25:33,758 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:25:33,759 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 184 treesize of output 215 [2023-01-28 10:25:33,777 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 60 treesize of output 42 [2023-01-28 10:25:38,327 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 10:25:38,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623390228] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:25:38,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:25:38,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-01-28 10:25:38,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651853517] [2023-01-28 10:25:38,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:25:38,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 10:25:38,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:38,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 10:25:38,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=349, Unknown=1, NotChecked=0, Total=420 [2023-01-28 10:25:38,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 305 [2023-01-28 10:25:38,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 105 transitions, 1193 flow. Second operand has 21 states, 21 states have (on average 92.14285714285714) internal successors, (1935), 21 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:38,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:38,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 305 [2023-01-28 10:25:38,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:42,913 INFO L130 PetriNetUnfolder]: 718/1290 cut-off events. [2023-01-28 10:25:42,913 INFO L131 PetriNetUnfolder]: For 6344/6426 co-relation queries the response was YES. [2023-01-28 10:25:42,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6248 conditions, 1290 events. 718/1290 cut-off events. For 6344/6426 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6847 event pairs, 123 based on Foata normal form. 50/1318 useless extension candidates. Maximal degree in co-relation 4513. Up to 662 conditions per place. [2023-01-28 10:25:42,920 INFO L137 encePairwiseOnDemand]: 297/305 looper letters, 78 selfloop transitions, 50 changer transitions 31/165 dead transitions. [2023-01-28 10:25:42,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 165 transitions, 1947 flow [2023-01-28 10:25:42,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 10:25:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 10:25:42,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 966 transitions. [2023-01-28 10:25:42,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31672131147540983 [2023-01-28 10:25:42,922 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 966 transitions. [2023-01-28 10:25:42,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 966 transitions. [2023-01-28 10:25:42,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:42,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 966 transitions. [2023-01-28 10:25:42,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 96.6) internal successors, (966), 10 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:42,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 305.0) internal successors, (3355), 11 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:42,936 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 305.0) internal successors, (3355), 11 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:42,936 INFO L175 Difference]: Start difference. First operand has 68 places, 105 transitions, 1193 flow. Second operand 10 states and 966 transitions. [2023-01-28 10:25:42,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 165 transitions, 1947 flow [2023-01-28 10:25:42,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 165 transitions, 1894 flow, removed 25 selfloop flow, removed 1 redundant places. [2023-01-28 10:25:42,956 INFO L231 Difference]: Finished difference. Result has 79 places, 113 transitions, 1396 flow [2023-01-28 10:25:42,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1396, PETRI_PLACES=79, PETRI_TRANSITIONS=113} [2023-01-28 10:25:42,957 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 57 predicate places. [2023-01-28 10:25:42,957 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 113 transitions, 1396 flow [2023-01-28 10:25:42,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 92.14285714285714) internal successors, (1935), 21 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:42,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:42,958 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:42,962 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 10:25:43,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 10:25:43,163 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:43,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:43,163 INFO L85 PathProgramCache]: Analyzing trace with hash 888256042, now seen corresponding path program 4 times [2023-01-28 10:25:43,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:43,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150151550] [2023-01-28 10:25:43,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:43,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:43,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:43,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:43,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:43,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150151550] [2023-01-28 10:25:43,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150151550] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:25:43,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624255453] [2023-01-28 10:25:43,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:25:43,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:43,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:25:43,252 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 10:25:43,254 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 10:25:43,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:25:43,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:25:43,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:25:43,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:25:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:43,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:25:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:43,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624255453] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:25:43,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:25:43,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 10:25:43,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996389531] [2023-01-28 10:25:43,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:25:43,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 10:25:43,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:43,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 10:25:43,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-01-28 10:25:43,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:25:43,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 113 transitions, 1396 flow. Second operand has 12 states, 12 states have (on average 129.58333333333334) internal successors, (1555), 12 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:43,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:43,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:25:43,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:43,776 INFO L130 PetriNetUnfolder]: 877/1639 cut-off events. [2023-01-28 10:25:43,776 INFO L131 PetriNetUnfolder]: For 7648/7648 co-relation queries the response was YES. [2023-01-28 10:25:43,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7955 conditions, 1639 events. 877/1639 cut-off events. For 7648/7648 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9267 event pairs, 22 based on Foata normal form. 32/1669 useless extension candidates. Maximal degree in co-relation 7782. Up to 665 conditions per place. [2023-01-28 10:25:43,786 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 157 selfloop transitions, 105 changer transitions 23/285 dead transitions. [2023-01-28 10:25:43,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 285 transitions, 3529 flow [2023-01-28 10:25:43,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 10:25:43,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 10:25:43,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2659 transitions. [2023-01-28 10:25:43,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359016393442623 [2023-01-28 10:25:43,792 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2659 transitions. [2023-01-28 10:25:43,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2659 transitions. [2023-01-28 10:25:43,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:43,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2659 transitions. [2023-01-28 10:25:43,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 132.95) internal successors, (2659), 20 states have internal predecessors, (2659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:43,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:43,806 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:43,806 INFO L175 Difference]: Start difference. First operand has 79 places, 113 transitions, 1396 flow. Second operand 20 states and 2659 transitions. [2023-01-28 10:25:43,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 285 transitions, 3529 flow [2023-01-28 10:25:43,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 285 transitions, 3259 flow, removed 115 selfloop flow, removed 5 redundant places. [2023-01-28 10:25:43,826 INFO L231 Difference]: Finished difference. Result has 103 places, 180 transitions, 2340 flow [2023-01-28 10:25:43,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2340, PETRI_PLACES=103, PETRI_TRANSITIONS=180} [2023-01-28 10:25:43,827 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 81 predicate places. [2023-01-28 10:25:43,827 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 180 transitions, 2340 flow [2023-01-28 10:25:43,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 129.58333333333334) internal successors, (1555), 12 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:43,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:43,827 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:43,832 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 10:25:44,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 10:25:44,033 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:44,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:44,034 INFO L85 PathProgramCache]: Analyzing trace with hash -91606092, now seen corresponding path program 5 times [2023-01-28 10:25:44,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:44,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294446855] [2023-01-28 10:25:44,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:44,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:44,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:44,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294446855] [2023-01-28 10:25:44,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294446855] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:25:44,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508495324] [2023-01-28 10:25:44,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:25:44,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:44,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:25:44,102 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 10:25:44,104 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 10:25:44,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 10:25:44,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:25:44,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:25:44,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:25:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:44,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:25:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:44,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508495324] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:25:44,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:25:44,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 10:25:44,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324607548] [2023-01-28 10:25:44,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:25:44,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 10:25:44,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:44,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 10:25:44,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-01-28 10:25:44,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:25:44,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 180 transitions, 2340 flow. Second operand has 12 states, 12 states have (on average 129.33333333333334) internal successors, (1552), 12 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:44,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:44,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:25:44,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:44,700 INFO L130 PetriNetUnfolder]: 776/1509 cut-off events. [2023-01-28 10:25:44,700 INFO L131 PetriNetUnfolder]: For 13435/13435 co-relation queries the response was YES. [2023-01-28 10:25:44,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9109 conditions, 1509 events. 776/1509 cut-off events. For 13435/13435 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8818 event pairs, 96 based on Foata normal form. 64/1571 useless extension candidates. Maximal degree in co-relation 8613. Up to 762 conditions per place. [2023-01-28 10:25:44,710 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 157 selfloop transitions, 95 changer transitions 1/253 dead transitions. [2023-01-28 10:25:44,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 253 transitions, 3517 flow [2023-01-28 10:25:44,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 10:25:44,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 10:25:44,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1876 transitions. [2023-01-28 10:25:44,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43934426229508194 [2023-01-28 10:25:44,712 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1876 transitions. [2023-01-28 10:25:44,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1876 transitions. [2023-01-28 10:25:44,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:44,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1876 transitions. [2023-01-28 10:25:44,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 134.0) internal successors, (1876), 14 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:44,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 305.0) internal successors, (4575), 15 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:44,719 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 305.0) internal successors, (4575), 15 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:44,719 INFO L175 Difference]: Start difference. First operand has 103 places, 180 transitions, 2340 flow. Second operand 14 states and 1876 transitions. [2023-01-28 10:25:44,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 253 transitions, 3517 flow [2023-01-28 10:25:44,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 253 transitions, 3118 flow, removed 170 selfloop flow, removed 5 redundant places. [2023-01-28 10:25:44,752 INFO L231 Difference]: Finished difference. Result has 115 places, 186 transitions, 2378 flow [2023-01-28 10:25:44,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=2007, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2378, PETRI_PLACES=115, PETRI_TRANSITIONS=186} [2023-01-28 10:25:44,752 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 93 predicate places. [2023-01-28 10:25:44,752 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 186 transitions, 2378 flow [2023-01-28 10:25:44,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 129.33333333333334) internal successors, (1552), 12 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:44,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:44,753 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:44,758 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 10:25:44,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-28 10:25:44,958 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:44,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:44,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1082840516, now seen corresponding path program 6 times [2023-01-28 10:25:44,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:44,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770369296] [2023-01-28 10:25:44,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:44,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:45,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:45,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770369296] [2023-01-28 10:25:45,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770369296] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:25:45,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324949183] [2023-01-28 10:25:45,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:25:45,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:45,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:25:45,028 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 10:25:45,030 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 10:25:45,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 10:25:45,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:25:45,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:25:45,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:25:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:45,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:25:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:45,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324949183] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:25:45,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:25:45,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 10:25:45,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857117029] [2023-01-28 10:25:45,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:25:45,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 10:25:45,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:45,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 10:25:45,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-01-28 10:25:45,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:25:45,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 186 transitions, 2378 flow. Second operand has 15 states, 15 states have (on average 129.0) internal successors, (1935), 15 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:45,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:45,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:25:45,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:45,691 INFO L130 PetriNetUnfolder]: 986/1971 cut-off events. [2023-01-28 10:25:45,691 INFO L131 PetriNetUnfolder]: For 19834/19834 co-relation queries the response was YES. [2023-01-28 10:25:45,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11734 conditions, 1971 events. 986/1971 cut-off events. For 19834/19834 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12605 event pairs, 22 based on Foata normal form. 26/1995 useless extension candidates. Maximal degree in co-relation 10978. Up to 625 conditions per place. [2023-01-28 10:25:45,708 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 165 selfloop transitions, 153 changer transitions 14/332 dead transitions. [2023-01-28 10:25:45,708 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 332 transitions, 4449 flow [2023-01-28 10:25:45,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 10:25:45,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 10:25:45,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3045 transitions. [2023-01-28 10:25:45,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43406985032074125 [2023-01-28 10:25:45,713 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3045 transitions. [2023-01-28 10:25:45,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3045 transitions. [2023-01-28 10:25:45,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:45,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3045 transitions. [2023-01-28 10:25:45,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 132.3913043478261) internal successors, (3045), 23 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:45,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 305.0) internal successors, (7320), 24 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:45,724 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 305.0) internal successors, (7320), 24 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:45,724 INFO L175 Difference]: Start difference. First operand has 115 places, 186 transitions, 2378 flow. Second operand 23 states and 3045 transitions. [2023-01-28 10:25:45,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 332 transitions, 4449 flow [2023-01-28 10:25:45,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 332 transitions, 4278 flow, removed 21 selfloop flow, removed 8 redundant places. [2023-01-28 10:25:45,785 INFO L231 Difference]: Finished difference. Result has 139 places, 235 transitions, 3422 flow [2023-01-28 10:25:45,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3422, PETRI_PLACES=139, PETRI_TRANSITIONS=235} [2023-01-28 10:25:45,785 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 117 predicate places. [2023-01-28 10:25:45,785 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 235 transitions, 3422 flow [2023-01-28 10:25:45,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 129.0) internal successors, (1935), 15 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:45,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:45,786 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:45,805 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 10:25:45,990 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,SelfDestructingSolverStorable17 [2023-01-28 10:25:45,990 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:45,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:45,990 INFO L85 PathProgramCache]: Analyzing trace with hash 549254058, now seen corresponding path program 7 times [2023-01-28 10:25:45,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:45,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372454042] [2023-01-28 10:25:45,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:45,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:46,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:46,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372454042] [2023-01-28 10:25:46,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372454042] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:25:46,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168087163] [2023-01-28 10:25:46,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:25:46,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:46,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:25:46,059 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 10:25:46,061 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 10:25:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:46,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:25:46,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:25:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:46,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:25:46,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:46,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168087163] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:25:46,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:25:46,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 10:25:46,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111100398] [2023-01-28 10:25:46,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:25:46,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 10:25:46,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:46,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 10:25:46,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-01-28 10:25:46,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:25:46,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 235 transitions, 3422 flow. Second operand has 15 states, 15 states have (on average 129.13333333333333) internal successors, (1937), 15 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:46,229 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:46,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:25:46,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:46,708 INFO L130 PetriNetUnfolder]: 1214/2390 cut-off events. [2023-01-28 10:25:46,709 INFO L131 PetriNetUnfolder]: For 42971/42971 co-relation queries the response was YES. [2023-01-28 10:25:46,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17251 conditions, 2390 events. 1214/2390 cut-off events. For 42971/42971 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 15693 event pairs, 371 based on Foata normal form. 106/2494 useless extension candidates. Maximal degree in co-relation 16358. Up to 1604 conditions per place. [2023-01-28 10:25:46,726 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 239 selfloop transitions, 108 changer transitions 9/356 dead transitions. [2023-01-28 10:25:46,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 356 transitions, 5908 flow [2023-01-28 10:25:46,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 10:25:46,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 10:25:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1734 transitions. [2023-01-28 10:25:46,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4373266078184111 [2023-01-28 10:25:46,728 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1734 transitions. [2023-01-28 10:25:46,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1734 transitions. [2023-01-28 10:25:46,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:46,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1734 transitions. [2023-01-28 10:25:46,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 133.3846153846154) internal successors, (1734), 13 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:46,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:46,733 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:46,733 INFO L175 Difference]: Start difference. First operand has 139 places, 235 transitions, 3422 flow. Second operand 13 states and 1734 transitions. [2023-01-28 10:25:46,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 356 transitions, 5908 flow [2023-01-28 10:25:46,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 356 transitions, 5526 flow, removed 161 selfloop flow, removed 7 redundant places. [2023-01-28 10:25:46,846 INFO L231 Difference]: Finished difference. Result has 149 places, 297 transitions, 4606 flow [2023-01-28 10:25:46,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=3113, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4606, PETRI_PLACES=149, PETRI_TRANSITIONS=297} [2023-01-28 10:25:46,846 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 127 predicate places. [2023-01-28 10:25:46,846 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 297 transitions, 4606 flow [2023-01-28 10:25:46,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 129.13333333333333) internal successors, (1937), 15 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:46,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:46,847 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:46,851 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 10:25:47,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:47,051 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:47,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:47,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1583947118, now seen corresponding path program 8 times [2023-01-28 10:25:47,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:47,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790511644] [2023-01-28 10:25:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:47,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:47,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:47,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790511644] [2023-01-28 10:25:47,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790511644] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:25:47,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823960887] [2023-01-28 10:25:47,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:25:47,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:47,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:25:47,112 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 10:25:47,114 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 10:25:47,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:25:47,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:25:47,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:25:47,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:25:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:47,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:25:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:47,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823960887] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:25:47,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:25:47,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-28 10:25:47,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717432553] [2023-01-28 10:25:47,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:25:47,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 10:25:47,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:47,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 10:25:47,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-01-28 10:25:47,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:25:47,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 297 transitions, 4606 flow. Second operand has 13 states, 13 states have (on average 129.30769230769232) internal successors, (1681), 13 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:47,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:47,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:25:47,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:47,855 INFO L130 PetriNetUnfolder]: 1393/2776 cut-off events. [2023-01-28 10:25:47,855 INFO L131 PetriNetUnfolder]: For 61073/61073 co-relation queries the response was YES. [2023-01-28 10:25:47,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21427 conditions, 2776 events. 1393/2776 cut-off events. For 61073/61073 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 19089 event pairs, 152 based on Foata normal form. 48/2822 useless extension candidates. Maximal degree in co-relation 20398. Up to 1195 conditions per place. [2023-01-28 10:25:47,876 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 236 selfloop transitions, 196 changer transitions 8/440 dead transitions. [2023-01-28 10:25:47,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 440 transitions, 7324 flow [2023-01-28 10:25:47,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 10:25:47,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 10:25:47,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2012 transitions. [2023-01-28 10:25:47,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397814207650273 [2023-01-28 10:25:47,879 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2012 transitions. [2023-01-28 10:25:47,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2012 transitions. [2023-01-28 10:25:47,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:47,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2012 transitions. [2023-01-28 10:25:47,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 134.13333333333333) internal successors, (2012), 15 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:47,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 305.0) internal successors, (4880), 16 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:47,885 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 305.0) internal successors, (4880), 16 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:47,885 INFO L175 Difference]: Start difference. First operand has 149 places, 297 transitions, 4606 flow. Second operand 15 states and 2012 transitions. [2023-01-28 10:25:47,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 440 transitions, 7324 flow [2023-01-28 10:25:48,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 440 transitions, 6822 flow, removed 213 selfloop flow, removed 5 redundant places. [2023-01-28 10:25:48,065 INFO L231 Difference]: Finished difference. Result has 163 places, 352 transitions, 5735 flow [2023-01-28 10:25:48,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=4128, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5735, PETRI_PLACES=163, PETRI_TRANSITIONS=352} [2023-01-28 10:25:48,066 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 141 predicate places. [2023-01-28 10:25:48,066 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 352 transitions, 5735 flow [2023-01-28 10:25:48,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 129.30769230769232) internal successors, (1681), 13 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:48,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:48,066 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:48,073 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 10:25:48,271 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,SelfDestructingSolverStorable19 [2023-01-28 10:25:48,271 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:48,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:48,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1724744702, now seen corresponding path program 9 times [2023-01-28 10:25:48,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:48,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920221756] [2023-01-28 10:25:48,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:48,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:48,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:48,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920221756] [2023-01-28 10:25:48,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920221756] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:25:48,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150385273] [2023-01-28 10:25:48,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:25:48,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:48,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:25:48,346 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 10:25:48,348 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 10:25:48,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:25:48,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:25:48,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:25:48,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:25:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:48,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:25:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:48,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150385273] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:25:48,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:25:48,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 10:25:48,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230533233] [2023-01-28 10:25:48,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:25:48,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 10:25:48,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:48,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 10:25:48,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-01-28 10:25:48,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:25:48,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 352 transitions, 5735 flow. Second operand has 15 states, 15 states have (on average 129.13333333333333) internal successors, (1937), 15 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:48,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:48,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:25:48,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:49,334 INFO L130 PetriNetUnfolder]: 1684/3315 cut-off events. [2023-01-28 10:25:49,334 INFO L131 PetriNetUnfolder]: For 77074/77074 co-relation queries the response was YES. [2023-01-28 10:25:49,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26880 conditions, 3315 events. 1684/3315 cut-off events. For 77074/77074 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 23491 event pairs, 232 based on Foata normal form. 102/3415 useless extension candidates. Maximal degree in co-relation 26354. Up to 2315 conditions per place. [2023-01-28 10:25:49,366 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 363 selfloop transitions, 137 changer transitions 3/503 dead transitions. [2023-01-28 10:25:49,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 503 transitions, 9411 flow [2023-01-28 10:25:49,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 10:25:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 10:25:49,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2261 transitions. [2023-01-28 10:25:49,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4360655737704918 [2023-01-28 10:25:49,370 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2261 transitions. [2023-01-28 10:25:49,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2261 transitions. [2023-01-28 10:25:49,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:49,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2261 transitions. [2023-01-28 10:25:49,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 133.0) internal successors, (2261), 17 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:49,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:49,377 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:49,377 INFO L175 Difference]: Start difference. First operand has 163 places, 352 transitions, 5735 flow. Second operand 17 states and 2261 transitions. [2023-01-28 10:25:49,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 503 transitions, 9411 flow [2023-01-28 10:25:49,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 503 transitions, 9101 flow, removed 110 selfloop flow, removed 8 redundant places. [2023-01-28 10:25:49,623 INFO L231 Difference]: Finished difference. Result has 180 places, 441 transitions, 7806 flow [2023-01-28 10:25:49,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=5478, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7806, PETRI_PLACES=180, PETRI_TRANSITIONS=441} [2023-01-28 10:25:49,624 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 158 predicate places. [2023-01-28 10:25:49,624 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 441 transitions, 7806 flow [2023-01-28 10:25:49,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 129.13333333333333) internal successors, (1937), 15 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:49,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:49,624 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:49,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 10:25:49,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:49,825 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:49,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:49,825 INFO L85 PathProgramCache]: Analyzing trace with hash -341483624, now seen corresponding path program 10 times [2023-01-28 10:25:49,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:49,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038934866] [2023-01-28 10:25:49,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:49,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:49,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:49,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038934866] [2023-01-28 10:25:49,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038934866] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:25:49,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468199569] [2023-01-28 10:25:49,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:25:49,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:49,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:25:49,890 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 10:25:49,890 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 10:25:49,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:25:49,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:25:49,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:25:49,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:25:50,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:50,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:25:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:50,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468199569] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:25:50,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:25:50,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-28 10:25:50,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913056564] [2023-01-28 10:25:50,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:25:50,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 10:25:50,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:50,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 10:25:50,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-01-28 10:25:50,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:25:50,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 441 transitions, 7806 flow. Second operand has 13 states, 13 states have (on average 129.23076923076923) internal successors, (1680), 13 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:50,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:50,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:25:50,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:50,995 INFO L130 PetriNetUnfolder]: 1959/3913 cut-off events. [2023-01-28 10:25:50,995 INFO L131 PetriNetUnfolder]: For 124982/124982 co-relation queries the response was YES. [2023-01-28 10:25:51,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35173 conditions, 3913 events. 1959/3913 cut-off events. For 124982/124982 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 29224 event pairs, 741 based on Foata normal form. 58/3969 useless extension candidates. Maximal degree in co-relation 34056. Up to 2901 conditions per place. [2023-01-28 10:25:51,028 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 433 selfloop transitions, 119 changer transitions 1/553 dead transitions. [2023-01-28 10:25:51,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 553 transitions, 10851 flow [2023-01-28 10:25:51,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 10:25:51,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 10:25:51,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1613 transitions. [2023-01-28 10:25:51,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4407103825136612 [2023-01-28 10:25:51,030 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1613 transitions. [2023-01-28 10:25:51,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1613 transitions. [2023-01-28 10:25:51,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:51,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1613 transitions. [2023-01-28 10:25:51,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 134.41666666666666) internal successors, (1613), 12 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:51,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 305.0) internal successors, (3965), 13 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:51,034 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 305.0) internal successors, (3965), 13 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:51,034 INFO L175 Difference]: Start difference. First operand has 180 places, 441 transitions, 7806 flow. Second operand 12 states and 1613 transitions. [2023-01-28 10:25:51,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 553 transitions, 10851 flow [2023-01-28 10:25:51,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 553 transitions, 9916 flow, removed 428 selfloop flow, removed 4 redundant places. [2023-01-28 10:25:51,493 INFO L231 Difference]: Finished difference. Result has 192 places, 496 transitions, 8474 flow [2023-01-28 10:25:51,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=6957, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8474, PETRI_PLACES=192, PETRI_TRANSITIONS=496} [2023-01-28 10:25:51,494 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 170 predicate places. [2023-01-28 10:25:51,494 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 496 transitions, 8474 flow [2023-01-28 10:25:51,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 129.23076923076923) internal successors, (1680), 13 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:51,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:51,494 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:51,500 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 10:25:51,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:51,695 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:51,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:51,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1849205694, now seen corresponding path program 11 times [2023-01-28 10:25:51,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:51,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341816653] [2023-01-28 10:25:51,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:51,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:51,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:51,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341816653] [2023-01-28 10:25:51,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341816653] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:25:51,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677801401] [2023-01-28 10:25:51,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:25:51,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:51,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:25:51,781 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 10:25:51,784 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 10:25:51,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:25:51,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:25:51,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:25:51,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:25:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:51,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:25:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:51,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677801401] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:25:51,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:25:51,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-01-28 10:25:51,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339821664] [2023-01-28 10:25:51,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:25:51,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 10:25:51,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:51,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 10:25:51,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-01-28 10:25:51,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:25:51,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 496 transitions, 8474 flow. Second operand has 11 states, 11 states have (on average 129.45454545454547) internal successors, (1424), 11 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:51,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:51,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:25:51,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:52,848 INFO L130 PetriNetUnfolder]: 2211/4356 cut-off events. [2023-01-28 10:25:52,848 INFO L131 PetriNetUnfolder]: For 152825/152825 co-relation queries the response was YES. [2023-01-28 10:25:52,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40023 conditions, 4356 events. 2211/4356 cut-off events. For 152825/152825 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 32702 event pairs, 330 based on Foata normal form. 40/4394 useless extension candidates. Maximal degree in co-relation 38844. Up to 2943 conditions per place. [2023-01-28 10:25:52,886 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 437 selfloop transitions, 155 changer transitions 0/592 dead transitions. [2023-01-28 10:25:52,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 592 transitions, 11367 flow [2023-01-28 10:25:52,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:25:52,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:25:52,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 940 transitions. [2023-01-28 10:25:52,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44028103044496486 [2023-01-28 10:25:52,887 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 940 transitions. [2023-01-28 10:25:52,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 940 transitions. [2023-01-28 10:25:52,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:52,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 940 transitions. [2023-01-28 10:25:52,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 134.28571428571428) internal successors, (940), 7 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:52,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 305.0) internal successors, (2440), 8 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:52,889 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 305.0) internal successors, (2440), 8 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:52,889 INFO L175 Difference]: Start difference. First operand has 192 places, 496 transitions, 8474 flow. Second operand 7 states and 940 transitions. [2023-01-28 10:25:52,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 592 transitions, 11367 flow [2023-01-28 10:25:53,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 592 transitions, 11087 flow, removed 114 selfloop flow, removed 4 redundant places. [2023-01-28 10:25:53,436 INFO L231 Difference]: Finished difference. Result has 198 places, 538 transitions, 9607 flow [2023-01-28 10:25:53,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=8194, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9607, PETRI_PLACES=198, PETRI_TRANSITIONS=538} [2023-01-28 10:25:53,437 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 176 predicate places. [2023-01-28 10:25:53,437 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 538 transitions, 9607 flow [2023-01-28 10:25:53,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 129.45454545454547) internal successors, (1424), 11 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:53,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:53,437 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:53,443 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 10:25:53,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-01-28 10:25:53,638 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:53,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:53,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1259303408, now seen corresponding path program 12 times [2023-01-28 10:25:53,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:53,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361519807] [2023-01-28 10:25:53,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:53,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:53,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:53,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361519807] [2023-01-28 10:25:53,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361519807] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:25:53,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602888899] [2023-01-28 10:25:53,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:25:53,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:53,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:25:53,699 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 10:25:53,701 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 10:25:53,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 10:25:53,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:25:53,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:25:53,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:25:53,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:53,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:25:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:53,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602888899] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:25:53,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:25:53,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-28 10:25:53,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025789671] [2023-01-28 10:25:53,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:25:53,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 10:25:53,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:53,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 10:25:53,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-01-28 10:25:53,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:25:53,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 538 transitions, 9607 flow. Second operand has 13 states, 13 states have (on average 129.23076923076923) internal successors, (1680), 13 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:53,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:53,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:25:53,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:55,119 INFO L130 PetriNetUnfolder]: 2275/4489 cut-off events. [2023-01-28 10:25:55,119 INFO L131 PetriNetUnfolder]: For 165888/165888 co-relation queries the response was YES. [2023-01-28 10:25:55,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42483 conditions, 4489 events. 2275/4489 cut-off events. For 165888/165888 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 33895 event pairs, 522 based on Foata normal form. 20/4507 useless extension candidates. Maximal degree in co-relation 41299. Up to 2041 conditions per place. [2023-01-28 10:25:55,154 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 466 selfloop transitions, 160 changer transitions 4/630 dead transitions. [2023-01-28 10:25:55,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 630 transitions, 12414 flow [2023-01-28 10:25:55,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 10:25:55,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 10:25:55,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2257 transitions. [2023-01-28 10:25:55,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43529411764705883 [2023-01-28 10:25:55,157 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2257 transitions. [2023-01-28 10:25:55,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2257 transitions. [2023-01-28 10:25:55,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:55,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2257 transitions. [2023-01-28 10:25:55,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 132.76470588235293) internal successors, (2257), 17 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:55,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:55,162 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:55,162 INFO L175 Difference]: Start difference. First operand has 198 places, 538 transitions, 9607 flow. Second operand 17 states and 2257 transitions. [2023-01-28 10:25:55,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 630 transitions, 12414 flow [2023-01-28 10:25:55,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 630 transitions, 12259 flow, removed 57 selfloop flow, removed 2 redundant places. [2023-01-28 10:25:55,686 INFO L231 Difference]: Finished difference. Result has 220 places, 565 transitions, 10797 flow [2023-01-28 10:25:55,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=9460, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10797, PETRI_PLACES=220, PETRI_TRANSITIONS=565} [2023-01-28 10:25:55,687 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 198 predicate places. [2023-01-28 10:25:55,687 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 565 transitions, 10797 flow [2023-01-28 10:25:55,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 129.23076923076923) internal successors, (1680), 13 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:55,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:55,688 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:55,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-28 10:25:55,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:55,892 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:55,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:55,892 INFO L85 PathProgramCache]: Analyzing trace with hash -269424514, now seen corresponding path program 13 times [2023-01-28 10:25:55,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:55,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572393649] [2023-01-28 10:25:55,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:55,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:55,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:55,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572393649] [2023-01-28 10:25:55,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572393649] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:25:55,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449813053] [2023-01-28 10:25:55,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:25:55,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:55,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:25:55,983 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 10:25:55,985 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 10:25:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:56,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:25:56,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:25:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:56,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:25:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:56,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449813053] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:25:56,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:25:56,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 10:25:56,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199637516] [2023-01-28 10:25:56,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:25:56,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 10:25:56,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:56,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 10:25:56,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-01-28 10:25:56,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:25:56,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 565 transitions, 10797 flow. Second operand has 15 states, 15 states have (on average 129.13333333333333) internal successors, (1937), 15 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:56,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:56,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:25:56,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:57,468 INFO L130 PetriNetUnfolder]: 2302/4555 cut-off events. [2023-01-28 10:25:57,469 INFO L131 PetriNetUnfolder]: For 228171/228171 co-relation queries the response was YES. [2023-01-28 10:25:57,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46898 conditions, 4555 events. 2302/4555 cut-off events. For 228171/228171 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 34595 event pairs, 480 based on Foata normal form. 24/4577 useless extension candidates. Maximal degree in co-relation 45534. Up to 1881 conditions per place. [2023-01-28 10:25:57,508 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 452 selfloop transitions, 198 changer transitions 18/668 dead transitions. [2023-01-28 10:25:57,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 668 transitions, 13860 flow [2023-01-28 10:25:57,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 10:25:57,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 10:25:57,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2778 transitions. [2023-01-28 10:25:57,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43372365339578456 [2023-01-28 10:25:57,511 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2778 transitions. [2023-01-28 10:25:57,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2778 transitions. [2023-01-28 10:25:57,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:57,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2778 transitions. [2023-01-28 10:25:57,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 132.28571428571428) internal successors, (2778), 21 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:57,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:57,516 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:57,517 INFO L175 Difference]: Start difference. First operand has 220 places, 565 transitions, 10797 flow. Second operand 21 states and 2778 transitions. [2023-01-28 10:25:57,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 668 transitions, 13860 flow [2023-01-28 10:25:58,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 668 transitions, 13250 flow, removed 283 selfloop flow, removed 3 redundant places. [2023-01-28 10:25:58,419 INFO L231 Difference]: Finished difference. Result has 246 places, 588 transitions, 11575 flow [2023-01-28 10:25:58,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=10187, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11575, PETRI_PLACES=246, PETRI_TRANSITIONS=588} [2023-01-28 10:25:58,420 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 224 predicate places. [2023-01-28 10:25:58,420 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 588 transitions, 11575 flow [2023-01-28 10:25:58,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 129.13333333333333) internal successors, (1937), 15 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:58,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:25:58,420 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:25:58,427 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 10:25:58,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:58,621 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:25:58,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:25:58,621 INFO L85 PathProgramCache]: Analyzing trace with hash 176831978, now seen corresponding path program 14 times [2023-01-28 10:25:58,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:25:58,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098059884] [2023-01-28 10:25:58,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:25:58,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:25:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:25:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:58,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:25:58,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098059884] [2023-01-28 10:25:58,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098059884] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:25:58,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771516873] [2023-01-28 10:25:58,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:25:58,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:25:58,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:25:58,697 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 10:25:58,699 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 10:25:58,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:25:58,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:25:58,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:25:58,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:25:58,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:58,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:25:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:25:58,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771516873] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:25:58,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:25:58,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-01-28 10:25:58,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939016546] [2023-01-28 10:25:58,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:25:58,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 10:25:58,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:25:58,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 10:25:58,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-01-28 10:25:58,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:25:58,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 588 transitions, 11575 flow. Second operand has 13 states, 13 states have (on average 129.3846153846154) internal successors, (1682), 13 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:58,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:25:58,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:25:58,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:26:00,128 INFO L130 PetriNetUnfolder]: 2435/4768 cut-off events. [2023-01-28 10:26:00,128 INFO L131 PetriNetUnfolder]: For 311310/311310 co-relation queries the response was YES. [2023-01-28 10:26:00,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52010 conditions, 4768 events. 2435/4768 cut-off events. For 311310/311310 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 36086 event pairs, 330 based on Foata normal form. 18/4784 useless extension candidates. Maximal degree in co-relation 50697. Up to 3920 conditions per place. [2023-01-28 10:26:00,168 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 540 selfloop transitions, 139 changer transitions 4/683 dead transitions. [2023-01-28 10:26:00,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 683 transitions, 14647 flow [2023-01-28 10:26:00,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 10:26:00,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 10:26:00,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1457 transitions. [2023-01-28 10:26:00,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4342771982116244 [2023-01-28 10:26:00,171 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1457 transitions. [2023-01-28 10:26:00,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1457 transitions. [2023-01-28 10:26:00,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:26:00,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1457 transitions. [2023-01-28 10:26:00,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 132.45454545454547) internal successors, (1457), 11 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:00,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:00,174 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:00,174 INFO L175 Difference]: Start difference. First operand has 246 places, 588 transitions, 11575 flow. Second operand 11 states and 1457 transitions. [2023-01-28 10:26:00,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 683 transitions, 14647 flow [2023-01-28 10:26:01,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 683 transitions, 14005 flow, removed 285 selfloop flow, removed 9 redundant places. [2023-01-28 10:26:01,213 INFO L231 Difference]: Finished difference. Result has 250 places, 643 transitions, 12387 flow [2023-01-28 10:26:01,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=10957, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12387, PETRI_PLACES=250, PETRI_TRANSITIONS=643} [2023-01-28 10:26:01,214 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 228 predicate places. [2023-01-28 10:26:01,214 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 643 transitions, 12387 flow [2023-01-28 10:26:01,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 129.3846153846154) internal successors, (1682), 13 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:01,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:26:01,214 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:26:01,221 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 10:26:01,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:26:01,415 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:26:01,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:26:01,415 INFO L85 PathProgramCache]: Analyzing trace with hash 2069382376, now seen corresponding path program 15 times [2023-01-28 10:26:01,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:26:01,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626819082] [2023-01-28 10:26:01,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:26:01,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:26:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:26:01,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:01,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:26:01,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626819082] [2023-01-28 10:26:01,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626819082] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:26:01,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793402325] [2023-01-28 10:26:01,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:26:01,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:26:01,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:26:01,489 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 10:26:01,491 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 10:26:01,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:26:01,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:26:01,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:26:01,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:26:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:01,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:26:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:01,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793402325] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:26:01,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:26:01,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 10:26:01,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549049417] [2023-01-28 10:26:01,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:26:01,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 10:26:01,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:26:01,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 10:26:01,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-01-28 10:26:01,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:26:01,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 643 transitions, 12387 flow. Second operand has 12 states, 12 states have (on average 129.33333333333334) internal successors, (1552), 12 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:01,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:26:01,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:26:01,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:26:03,075 INFO L130 PetriNetUnfolder]: 2524/4994 cut-off events. [2023-01-28 10:26:03,075 INFO L131 PetriNetUnfolder]: For 364898/364898 co-relation queries the response was YES. [2023-01-28 10:26:03,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56104 conditions, 4994 events. 2524/4994 cut-off events. For 364898/364898 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 38622 event pairs, 431 based on Foata normal form. 24/5016 useless extension candidates. Maximal degree in co-relation 55387. Up to 1846 conditions per place. [2023-01-28 10:26:03,125 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 475 selfloop transitions, 263 changer transitions 1/739 dead transitions. [2023-01-28 10:26:03,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 739 transitions, 15773 flow [2023-01-28 10:26:03,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 10:26:03,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 10:26:03,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2393 transitions. [2023-01-28 10:26:03,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358834244080146 [2023-01-28 10:26:03,129 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2393 transitions. [2023-01-28 10:26:03,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2393 transitions. [2023-01-28 10:26:03,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:26:03,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2393 transitions. [2023-01-28 10:26:03,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 132.94444444444446) internal successors, (2393), 18 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:03,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:03,135 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:03,135 INFO L175 Difference]: Start difference. First operand has 250 places, 643 transitions, 12387 flow. Second operand 18 states and 2393 transitions. [2023-01-28 10:26:03,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 739 transitions, 15773 flow [2023-01-28 10:26:04,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 739 transitions, 15381 flow, removed 158 selfloop flow, removed 4 redundant places. [2023-01-28 10:26:04,486 INFO L231 Difference]: Finished difference. Result has 270 places, 666 transitions, 13740 flow [2023-01-28 10:26:04,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=12013, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=13740, PETRI_PLACES=270, PETRI_TRANSITIONS=666} [2023-01-28 10:26:04,486 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 248 predicate places. [2023-01-28 10:26:04,486 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 666 transitions, 13740 flow [2023-01-28 10:26:04,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 129.33333333333334) internal successors, (1552), 12 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:04,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:26:04,487 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:26:04,491 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 10:26:04,691 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,SelfDestructingSolverStorable26 [2023-01-28 10:26:04,691 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:26:04,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:26:04,692 INFO L85 PathProgramCache]: Analyzing trace with hash 575743984, now seen corresponding path program 16 times [2023-01-28 10:26:04,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:26:04,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520993812] [2023-01-28 10:26:04,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:26:04,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:26:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:26:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:04,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:26:04,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520993812] [2023-01-28 10:26:04,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520993812] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:26:04,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864215186] [2023-01-28 10:26:04,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:26:04,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:26:04,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:26:04,753 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 10:26:04,755 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 10:26:04,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:26:04,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:26:04,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:26:04,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:26:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:04,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:26:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:04,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864215186] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:26:04,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:26:04,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-01-28 10:26:04,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688357745] [2023-01-28 10:26:04,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:26:04,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 10:26:04,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:26:04,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 10:26:04,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-28 10:26:04,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:26:04,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 666 transitions, 13740 flow. Second operand has 11 states, 11 states have (on average 129.45454545454547) internal successors, (1424), 11 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:04,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:26:04,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:26:04,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:26:06,356 INFO L130 PetriNetUnfolder]: 2527/5024 cut-off events. [2023-01-28 10:26:06,357 INFO L131 PetriNetUnfolder]: For 406053/406053 co-relation queries the response was YES. [2023-01-28 10:26:06,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58803 conditions, 5024 events. 2527/5024 cut-off events. For 406053/406053 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 39154 event pairs, 599 based on Foata normal form. 6/5028 useless extension candidates. Maximal degree in co-relation 58393. Up to 2204 conditions per place. [2023-01-28 10:26:06,406 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 543 selfloop transitions, 163 changer transitions 13/719 dead transitions. [2023-01-28 10:26:06,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 719 transitions, 16091 flow [2023-01-28 10:26:06,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 10:26:06,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 10:26:06,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1459 transitions. [2023-01-28 10:26:06,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43487332339791357 [2023-01-28 10:26:06,408 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1459 transitions. [2023-01-28 10:26:06,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1459 transitions. [2023-01-28 10:26:06,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:26:06,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1459 transitions. [2023-01-28 10:26:06,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 132.63636363636363) internal successors, (1459), 11 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:06,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:06,430 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:06,430 INFO L175 Difference]: Start difference. First operand has 270 places, 666 transitions, 13740 flow. Second operand 11 states and 1459 transitions. [2023-01-28 10:26:06,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 719 transitions, 16091 flow [2023-01-28 10:26:07,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 719 transitions, 15222 flow, removed 293 selfloop flow, removed 7 redundant places. [2023-01-28 10:26:08,004 INFO L231 Difference]: Finished difference. Result has 277 places, 668 transitions, 13453 flow [2023-01-28 10:26:08,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=12929, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13453, PETRI_PLACES=277, PETRI_TRANSITIONS=668} [2023-01-28 10:26:08,005 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 255 predicate places. [2023-01-28 10:26:08,005 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 668 transitions, 13453 flow [2023-01-28 10:26:08,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 129.45454545454547) internal successors, (1424), 11 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:08,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:26:08,005 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:26:08,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-28 10:26:08,209 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,SelfDestructingSolverStorable27 [2023-01-28 10:26:08,210 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:26:08,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:26:08,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1232509748, now seen corresponding path program 17 times [2023-01-28 10:26:08,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:26:08,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026634858] [2023-01-28 10:26:08,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:26:08,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:26:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:26:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:08,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:26:08,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026634858] [2023-01-28 10:26:08,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026634858] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:26:08,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390336169] [2023-01-28 10:26:08,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:26:08,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:26:08,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:26:08,298 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 10:26:08,300 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 10:26:08,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:26:08,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:26:08,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:26:08,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:26:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:08,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:26:08,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:08,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390336169] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:26:08,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:26:08,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-01-28 10:26:08,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026636415] [2023-01-28 10:26:08,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:26:08,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 10:26:08,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:26:08,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 10:26:08,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-01-28 10:26:08,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:26:08,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 668 transitions, 13453 flow. Second operand has 13 states, 13 states have (on average 129.23076923076923) internal successors, (1680), 13 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:08,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:26:08,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:26:08,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:26:10,057 INFO L130 PetriNetUnfolder]: 2508/4962 cut-off events. [2023-01-28 10:26:10,057 INFO L131 PetriNetUnfolder]: For 388713/388713 co-relation queries the response was YES. [2023-01-28 10:26:10,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57201 conditions, 4962 events. 2508/4962 cut-off events. For 388713/388713 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 38402 event pairs, 537 based on Foata normal form. 6/4966 useless extension candidates. Maximal degree in co-relation 56787. Up to 2204 conditions per place. [2023-01-28 10:26:10,112 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 505 selfloop transitions, 218 changer transitions 12/735 dead transitions. [2023-01-28 10:26:10,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 735 transitions, 15835 flow [2023-01-28 10:26:10,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 10:26:10,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 10:26:10,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2380 transitions. [2023-01-28 10:26:10,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335154826958106 [2023-01-28 10:26:10,114 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2380 transitions. [2023-01-28 10:26:10,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2380 transitions. [2023-01-28 10:26:10,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:26:10,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2380 transitions. [2023-01-28 10:26:10,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 132.22222222222223) internal successors, (2380), 18 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:10,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:10,119 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:10,119 INFO L175 Difference]: Start difference. First operand has 277 places, 668 transitions, 13453 flow. Second operand 18 states and 2380 transitions. [2023-01-28 10:26:10,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 735 transitions, 15835 flow [2023-01-28 10:26:11,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 735 transitions, 15556 flow, removed 92 selfloop flow, removed 5 redundant places. [2023-01-28 10:26:11,595 INFO L231 Difference]: Finished difference. Result has 288 places, 666 transitions, 13648 flow [2023-01-28 10:26:11,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=13254, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=13648, PETRI_PLACES=288, PETRI_TRANSITIONS=666} [2023-01-28 10:26:11,596 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 266 predicate places. [2023-01-28 10:26:11,596 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 666 transitions, 13648 flow [2023-01-28 10:26:11,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 129.23076923076923) internal successors, (1680), 13 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:11,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:26:11,597 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:26:11,601 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 10:26:11,798 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,SelfDestructingSolverStorable28 [2023-01-28 10:26:11,798 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:26:11,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:26:11,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1433210416, now seen corresponding path program 18 times [2023-01-28 10:26:11,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:26:11,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219166937] [2023-01-28 10:26:11,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:26:11,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:26:11,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:26:11,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:11,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:26:11,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219166937] [2023-01-28 10:26:11,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219166937] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:26:11,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628801397] [2023-01-28 10:26:11,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:26:11,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:26:11,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:26:11,861 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 10:26:11,863 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 10:26:12,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 10:26:12,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:26:12,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:26:12,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:26:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:12,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:26:12,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:12,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628801397] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:26:12,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:26:12,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 10:26:12,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217334046] [2023-01-28 10:26:12,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:26:12,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 10:26:12,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:26:12,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 10:26:12,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-01-28 10:26:12,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:26:12,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 666 transitions, 13648 flow. Second operand has 12 states, 12 states have (on average 129.58333333333334) internal successors, (1555), 12 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:12,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:26:12,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:26:12,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:26:13,633 INFO L130 PetriNetUnfolder]: 2530/5002 cut-off events. [2023-01-28 10:26:13,633 INFO L131 PetriNetUnfolder]: For 308599/308599 co-relation queries the response was YES. [2023-01-28 10:26:13,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54607 conditions, 5002 events. 2530/5002 cut-off events. For 308599/308599 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 38746 event pairs, 718 based on Foata normal form. 36/5036 useless extension candidates. Maximal degree in co-relation 54193. Up to 2990 conditions per place. [2023-01-28 10:26:13,682 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 486 selfloop transitions, 253 changer transitions 4/743 dead transitions. [2023-01-28 10:26:13,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 743 transitions, 16419 flow [2023-01-28 10:26:13,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 10:26:13,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 10:26:13,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1747 transitions. [2023-01-28 10:26:13,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4406052963430013 [2023-01-28 10:26:13,684 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1747 transitions. [2023-01-28 10:26:13,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1747 transitions. [2023-01-28 10:26:13,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:26:13,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1747 transitions. [2023-01-28 10:26:13,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 134.3846153846154) internal successors, (1747), 13 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:13,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:13,688 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:13,688 INFO L175 Difference]: Start difference. First operand has 288 places, 666 transitions, 13648 flow. Second operand 13 states and 1747 transitions. [2023-01-28 10:26:13,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 743 transitions, 16419 flow [2023-01-28 10:26:14,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 743 transitions, 16001 flow, removed 32 selfloop flow, removed 18 redundant places. [2023-01-28 10:26:14,813 INFO L231 Difference]: Finished difference. Result has 284 places, 678 transitions, 14401 flow [2023-01-28 10:26:14,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=13270, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14401, PETRI_PLACES=284, PETRI_TRANSITIONS=678} [2023-01-28 10:26:14,814 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 262 predicate places. [2023-01-28 10:26:14,814 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 678 transitions, 14401 flow [2023-01-28 10:26:14,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 129.58333333333334) internal successors, (1555), 12 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:14,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:26:14,814 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:26:14,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-01-28 10:26:15,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:26:15,019 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:26:15,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:26:15,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1176200413, now seen corresponding path program 19 times [2023-01-28 10:26:15,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:26:15,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082596470] [2023-01-28 10:26:15,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:26:15,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:26:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:26:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:26:16,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:26:16,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082596470] [2023-01-28 10:26:16,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082596470] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:26:16,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620642894] [2023-01-28 10:26:16,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:26:16,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:26:16,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:26:16,040 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 10:26:16,042 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 10:26:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:26:16,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 10:26:16,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:26:16,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:26:16,308 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-01-28 10:26:16,309 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 36 [2023-01-28 10:26:16,315 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 19 treesize of output 15 [2023-01-28 10:26:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:16,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:26:16,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:26:16,400 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 49 [2023-01-28 10:26:16,404 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 13 treesize of output 7 [2023-01-28 10:26:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:26:16,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620642894] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:26:16,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:26:16,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 20 [2023-01-28 10:26:16,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662398777] [2023-01-28 10:26:16,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:26:16,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 10:26:16,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:26:16,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 10:26:16,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=391, Unknown=4, NotChecked=0, Total=462 [2023-01-28 10:26:16,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 305 [2023-01-28 10:26:16,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 678 transitions, 14401 flow. Second operand has 22 states, 22 states have (on average 85.95454545454545) internal successors, (1891), 22 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:16,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:26:16,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 305 [2023-01-28 10:26:16,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:26:17,182 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~counter~0 4) c_~f_inv~0.offset))) (and (forall ((v_ArrVal_1098 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1098) c_~f_inv~0.base) .cse0) 0)) (= (select (select |c_#memory_int| c_~f_inv~0.base) .cse0) 0))) is different from false [2023-01-28 10:26:18,791 INFO L130 PetriNetUnfolder]: 2695/5380 cut-off events. [2023-01-28 10:26:18,792 INFO L131 PetriNetUnfolder]: For 334344/334388 co-relation queries the response was YES. [2023-01-28 10:26:18,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58856 conditions, 5380 events. 2695/5380 cut-off events. For 334344/334388 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 42705 event pairs, 332 based on Foata normal form. 44/5406 useless extension candidates. Maximal degree in co-relation 58442. Up to 4435 conditions per place. [2023-01-28 10:26:18,845 INFO L137 encePairwiseOnDemand]: 292/305 looper letters, 635 selfloop transitions, 170 changer transitions 26/839 dead transitions. [2023-01-28 10:26:18,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 839 transitions, 18774 flow [2023-01-28 10:26:18,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 10:26:18,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 10:26:18,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1863 transitions. [2023-01-28 10:26:18,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2908665105386417 [2023-01-28 10:26:18,851 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1863 transitions. [2023-01-28 10:26:18,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1863 transitions. [2023-01-28 10:26:18,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:26:18,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1863 transitions. [2023-01-28 10:26:18,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 88.71428571428571) internal successors, (1863), 21 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:18,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:18,855 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:18,855 INFO L175 Difference]: Start difference. First operand has 284 places, 678 transitions, 14401 flow. Second operand 21 states and 1863 transitions. [2023-01-28 10:26:18,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 839 transitions, 18774 flow [2023-01-28 10:26:20,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 839 transitions, 18089 flow, removed 84 selfloop flow, removed 13 redundant places. [2023-01-28 10:26:20,159 INFO L231 Difference]: Finished difference. Result has 299 places, 757 transitions, 15758 flow [2023-01-28 10:26:20,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=13828, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=15758, PETRI_PLACES=299, PETRI_TRANSITIONS=757} [2023-01-28 10:26:20,160 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 277 predicate places. [2023-01-28 10:26:20,161 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 757 transitions, 15758 flow [2023-01-28 10:26:20,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 85.95454545454545) internal successors, (1891), 22 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:20,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:26:20,161 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:26:20,168 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 10:26:20,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:26:20,366 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:26:20,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:26:20,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1264890525, now seen corresponding path program 20 times [2023-01-28 10:26:20,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:26:20,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521363803] [2023-01-28 10:26:20,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:26:20,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:26:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:26:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:20,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:26:20,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521363803] [2023-01-28 10:26:20,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521363803] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:26:20,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932150856] [2023-01-28 10:26:20,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:26:20,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:26:20,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:26:20,428 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 10:26:20,431 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 10:26:20,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:26:20,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:26:20,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:26:20,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:26:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:20,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:26:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:20,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932150856] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:26:20,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:26:20,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-28 10:26:20,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482031906] [2023-01-28 10:26:20,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:26:20,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 10:26:20,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:26:20,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 10:26:20,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-01-28 10:26:20,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:26:20,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 757 transitions, 15758 flow. Second operand has 13 states, 13 states have (on average 129.6153846153846) internal successors, (1685), 13 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:20,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:26:20,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:26:20,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:26:22,418 INFO L130 PetriNetUnfolder]: 2740/5573 cut-off events. [2023-01-28 10:26:22,418 INFO L131 PetriNetUnfolder]: For 320033/320033 co-relation queries the response was YES. [2023-01-28 10:26:22,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60311 conditions, 5573 events. 2740/5573 cut-off events. For 320033/320033 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 45262 event pairs, 529 based on Foata normal form. 28/5599 useless extension candidates. Maximal degree in co-relation 59886. Up to 2860 conditions per place. [2023-01-28 10:26:22,483 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 674 selfloop transitions, 232 changer transitions 70/976 dead transitions. [2023-01-28 10:26:22,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 976 transitions, 21696 flow [2023-01-28 10:26:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 10:26:22,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 10:26:22,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2239 transitions. [2023-01-28 10:26:22,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43182256509161043 [2023-01-28 10:26:22,486 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2239 transitions. [2023-01-28 10:26:22,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2239 transitions. [2023-01-28 10:26:22,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:26:22,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2239 transitions. [2023-01-28 10:26:22,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 131.7058823529412) internal successors, (2239), 17 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:22,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:22,490 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:22,490 INFO L175 Difference]: Start difference. First operand has 299 places, 757 transitions, 15758 flow. Second operand 17 states and 2239 transitions. [2023-01-28 10:26:22,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 976 transitions, 21696 flow [2023-01-28 10:26:23,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 976 transitions, 21350 flow, removed 168 selfloop flow, removed 3 redundant places. [2023-01-28 10:26:23,944 INFO L231 Difference]: Finished difference. Result has 316 places, 847 transitions, 18124 flow [2023-01-28 10:26:23,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=15169, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=18124, PETRI_PLACES=316, PETRI_TRANSITIONS=847} [2023-01-28 10:26:23,945 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 294 predicate places. [2023-01-28 10:26:23,945 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 847 transitions, 18124 flow [2023-01-28 10:26:23,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 129.6153846153846) internal successors, (1685), 13 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:23,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:26:23,945 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:26:23,950 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 10:26:24,150 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,SelfDestructingSolverStorable31 [2023-01-28 10:26:24,150 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:26:24,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:26:24,150 INFO L85 PathProgramCache]: Analyzing trace with hash -622098217, now seen corresponding path program 21 times [2023-01-28 10:26:24,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:26:24,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261460195] [2023-01-28 10:26:24,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:26:24,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:26:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:26:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:24,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:26:24,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261460195] [2023-01-28 10:26:24,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261460195] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:26:24,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390496698] [2023-01-28 10:26:24,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:26:24,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:26:24,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:26:24,214 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 10:26:24,216 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 10:26:24,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 10:26:24,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:26:24,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:26:24,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:26:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:24,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:26:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:24,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390496698] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:26:24,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:26:24,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-28 10:26:24,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730639223] [2023-01-28 10:26:24,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:26:24,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 10:26:24,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:26:24,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 10:26:24,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-01-28 10:26:24,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:26:24,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 847 transitions, 18124 flow. Second operand has 13 states, 13 states have (on average 129.3846153846154) internal successors, (1682), 13 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:24,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:26:24,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:26:24,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:26:26,440 INFO L130 PetriNetUnfolder]: 2564/5253 cut-off events. [2023-01-28 10:26:26,440 INFO L131 PetriNetUnfolder]: For 330284/330284 co-relation queries the response was YES. [2023-01-28 10:26:26,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58779 conditions, 5253 events. 2564/5253 cut-off events. For 330284/330284 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 42790 event pairs, 62 based on Foata normal form. 28/5279 useless extension candidates. Maximal degree in co-relation 58306. Up to 2171 conditions per place. [2023-01-28 10:26:26,501 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 602 selfloop transitions, 325 changer transitions 9/936 dead transitions. [2023-01-28 10:26:26,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 936 transitions, 21722 flow [2023-01-28 10:26:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 10:26:26,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 10:26:26,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2763 transitions. [2023-01-28 10:26:26,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4313817330210773 [2023-01-28 10:26:26,504 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2763 transitions. [2023-01-28 10:26:26,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2763 transitions. [2023-01-28 10:26:26,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:26:26,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2763 transitions. [2023-01-28 10:26:26,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 131.57142857142858) internal successors, (2763), 21 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:26,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:26,509 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:26,509 INFO L175 Difference]: Start difference. First operand has 316 places, 847 transitions, 18124 flow. Second operand 21 states and 2763 transitions. [2023-01-28 10:26:26,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 936 transitions, 21722 flow [2023-01-28 10:26:28,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 936 transitions, 20758 flow, removed 454 selfloop flow, removed 2 redundant places. [2023-01-28 10:26:28,456 INFO L231 Difference]: Finished difference. Result has 337 places, 865 transitions, 18562 flow [2023-01-28 10:26:28,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=17005, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=18562, PETRI_PLACES=337, PETRI_TRANSITIONS=865} [2023-01-28 10:26:28,457 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 315 predicate places. [2023-01-28 10:26:28,457 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 865 transitions, 18562 flow [2023-01-28 10:26:28,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 129.3846153846154) internal successors, (1682), 13 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:28,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:26:28,457 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:26:28,464 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 10:26:28,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-01-28 10:26:28,662 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:26:28,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:26:28,662 INFO L85 PathProgramCache]: Analyzing trace with hash 964755767, now seen corresponding path program 22 times [2023-01-28 10:26:28,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:26:28,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639919745] [2023-01-28 10:26:28,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:26:28,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:26:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:26:28,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:28,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:26:28,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639919745] [2023-01-28 10:26:28,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639919745] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:26:28,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437972258] [2023-01-28 10:26:28,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:26:28,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:26:28,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:26:28,719 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 10:26:28,721 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 10:26:28,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:26:28,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:26:28,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:26:28,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:26:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:28,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:26:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:28,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437972258] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:26:28,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:26:28,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 10:26:28,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892845394] [2023-01-28 10:26:28,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:26:28,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 10:26:28,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:26:28,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 10:26:28,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-01-28 10:26:28,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:26:28,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 865 transitions, 18562 flow. Second operand has 12 states, 12 states have (on average 129.33333333333334) internal successors, (1552), 12 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:28,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:26:28,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:26:28,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:26:30,910 INFO L130 PetriNetUnfolder]: 2672/5476 cut-off events. [2023-01-28 10:26:30,911 INFO L131 PetriNetUnfolder]: For 347227/347227 co-relation queries the response was YES. [2023-01-28 10:26:30,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60988 conditions, 5476 events. 2672/5476 cut-off events. For 347227/347227 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 44503 event pairs, 245 based on Foata normal form. 52/5526 useless extension candidates. Maximal degree in co-relation 60398. Up to 3449 conditions per place. [2023-01-28 10:26:30,972 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 628 selfloop transitions, 341 changer transitions 2/971 dead transitions. [2023-01-28 10:26:30,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 971 transitions, 22851 flow [2023-01-28 10:26:30,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 10:26:30,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 10:26:30,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1866 transitions. [2023-01-28 10:26:30,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4370023419203747 [2023-01-28 10:26:30,974 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1866 transitions. [2023-01-28 10:26:30,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1866 transitions. [2023-01-28 10:26:30,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:26:30,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1866 transitions. [2023-01-28 10:26:30,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 133.28571428571428) internal successors, (1866), 14 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:30,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 305.0) internal successors, (4575), 15 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:30,978 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 305.0) internal successors, (4575), 15 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:30,978 INFO L175 Difference]: Start difference. First operand has 337 places, 865 transitions, 18562 flow. Second operand 14 states and 1866 transitions. [2023-01-28 10:26:30,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 971 transitions, 22851 flow [2023-01-28 10:26:32,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 971 transitions, 22135 flow, removed 313 selfloop flow, removed 5 redundant places. [2023-01-28 10:26:32,800 INFO L231 Difference]: Finished difference. Result has 348 places, 900 transitions, 20007 flow [2023-01-28 10:26:32,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=17822, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=20007, PETRI_PLACES=348, PETRI_TRANSITIONS=900} [2023-01-28 10:26:32,801 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 326 predicate places. [2023-01-28 10:26:32,801 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 900 transitions, 20007 flow [2023-01-28 10:26:32,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 129.33333333333334) internal successors, (1552), 12 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:32,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:26:32,801 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:26:32,806 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 10:26:33,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:26:33,006 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:26:33,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:26:33,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1647919629, now seen corresponding path program 23 times [2023-01-28 10:26:33,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:26:33,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030785075] [2023-01-28 10:26:33,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:26:33,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:26:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:26:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:33,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:26:33,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030785075] [2023-01-28 10:26:33,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030785075] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:26:33,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620597626] [2023-01-28 10:26:33,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:26:33,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:26:33,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:26:33,069 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 10:26:33,071 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 10:26:33,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 10:26:33,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:26:33,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:26:33,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:26:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:33,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:26:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:26:33,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620597626] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:26:33,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:26:33,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 10:26:33,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203223584] [2023-01-28 10:26:33,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:26:33,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 10:26:33,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:26:33,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 10:26:33,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-01-28 10:26:33,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:26:33,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 900 transitions, 20007 flow. Second operand has 12 states, 12 states have (on average 129.5) internal successors, (1554), 12 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:33,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:26:33,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:26:33,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:26:35,193 INFO L130 PetriNetUnfolder]: 2590/5305 cut-off events. [2023-01-28 10:26:35,194 INFO L131 PetriNetUnfolder]: For 292660/292660 co-relation queries the response was YES. [2023-01-28 10:26:35,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57250 conditions, 5305 events. 2590/5305 cut-off events. For 292660/292660 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 43217 event pairs, 80 based on Foata normal form. 28/5331 useless extension candidates. Maximal degree in co-relation 56634. Up to 2022 conditions per place. [2023-01-28 10:26:35,258 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 591 selfloop transitions, 377 changer transitions 7/975 dead transitions. [2023-01-28 10:26:35,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 975 transitions, 23476 flow [2023-01-28 10:26:35,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 10:26:35,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 10:26:35,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2503 transitions. [2023-01-28 10:26:35,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4319240724762726 [2023-01-28 10:26:35,260 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2503 transitions. [2023-01-28 10:26:35,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2503 transitions. [2023-01-28 10:26:35,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:26:35,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2503 transitions. [2023-01-28 10:26:35,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 131.73684210526315) internal successors, (2503), 19 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:35,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 305.0) internal successors, (6100), 20 states have internal predecessors, (6100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:35,265 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 305.0) internal successors, (6100), 20 states have internal predecessors, (6100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:35,265 INFO L175 Difference]: Start difference. First operand has 348 places, 900 transitions, 20007 flow. Second operand 19 states and 2503 transitions. [2023-01-28 10:26:35,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 975 transitions, 23476 flow [2023-01-28 10:26:37,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 975 transitions, 22960 flow, removed 154 selfloop flow, removed 9 redundant places. [2023-01-28 10:26:37,060 INFO L231 Difference]: Finished difference. Result has 359 places, 902 transitions, 20637 flow [2023-01-28 10:26:37,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=19244, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=20637, PETRI_PLACES=359, PETRI_TRANSITIONS=902} [2023-01-28 10:26:37,061 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 337 predicate places. [2023-01-28 10:26:37,061 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 902 transitions, 20637 flow [2023-01-28 10:26:37,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 129.5) internal successors, (1554), 12 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:37,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:26:37,062 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:26:37,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-01-28 10:26:37,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:26:37,262 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:26:37,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:26:37,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1386457692, now seen corresponding path program 24 times [2023-01-28 10:26:37,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:26:37,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041239490] [2023-01-28 10:26:37,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:26:37,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:26:37,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:26:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:26:37,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:26:37,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041239490] [2023-01-28 10:26:37,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041239490] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:26:37,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978547343] [2023-01-28 10:26:37,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:26:37,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:26:37,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:26:37,969 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 10:26:37,971 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 10:26:38,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 10:26:38,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:26:38,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 10:26:38,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:26:38,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:26:38,216 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-01-28 10:26:38,216 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 36 [2023-01-28 10:26:38,223 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 19 treesize of output 15 [2023-01-28 10:26:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 10:26:38,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:26:38,295 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:26:38,295 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 49 [2023-01-28 10:26:38,299 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 13 treesize of output 7 [2023-01-28 10:26:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-01-28 10:26:38,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978547343] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:26:38,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:26:38,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 21 [2023-01-28 10:26:38,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264348886] [2023-01-28 10:26:38,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:26:38,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 10:26:38,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:26:38,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 10:26:38,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=419, Unknown=5, NotChecked=0, Total=506 [2023-01-28 10:26:38,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 305 [2023-01-28 10:26:38,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 902 transitions, 20637 flow. Second operand has 23 states, 23 states have (on average 88.73913043478261) internal successors, (2041), 23 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:38,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:26:38,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 305 [2023-01-28 10:26:38,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:26:38,837 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~counter~0 4) c_~f_inv~0.offset))) (and (forall ((v_ArrVal_1317 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1317) c_~f_inv~0.base) .cse0) 0)) (= (select (select |c_#memory_int| c_~f_inv~0.base) .cse0) 0))) is different from false [2023-01-28 10:26:40,709 INFO L130 PetriNetUnfolder]: 2601/5363 cut-off events. [2023-01-28 10:26:40,709 INFO L131 PetriNetUnfolder]: For 305104/305127 co-relation queries the response was YES. [2023-01-28 10:26:40,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59697 conditions, 5363 events. 2601/5363 cut-off events. For 305104/305127 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 43983 event pairs, 187 based on Foata normal form. 17/5361 useless extension candidates. Maximal degree in co-relation 59059. Up to 4322 conditions per place. [2023-01-28 10:26:40,773 INFO L137 encePairwiseOnDemand]: 293/305 looper letters, 808 selfloop transitions, 192 changer transitions 23/1032 dead transitions. [2023-01-28 10:26:40,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1032 transitions, 24944 flow [2023-01-28 10:26:40,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 10:26:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 10:26:40,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1658 transitions. [2023-01-28 10:26:40,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3020036429872495 [2023-01-28 10:26:40,775 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1658 transitions. [2023-01-28 10:26:40,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1658 transitions. [2023-01-28 10:26:40,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:26:40,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1658 transitions. [2023-01-28 10:26:40,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 92.11111111111111) internal successors, (1658), 18 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:40,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:40,779 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:40,779 INFO L175 Difference]: Start difference. First operand has 359 places, 902 transitions, 20637 flow. Second operand 18 states and 1658 transitions. [2023-01-28 10:26:40,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1032 transitions, 24944 flow [2023-01-28 10:26:42,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 1032 transitions, 24183 flow, removed 230 selfloop flow, removed 10 redundant places. [2023-01-28 10:26:42,871 INFO L231 Difference]: Finished difference. Result has 372 places, 954 transitions, 21489 flow [2023-01-28 10:26:42,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=19880, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=902, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=21489, PETRI_PLACES=372, PETRI_TRANSITIONS=954} [2023-01-28 10:26:42,872 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 350 predicate places. [2023-01-28 10:26:42,872 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 954 transitions, 21489 flow [2023-01-28 10:26:42,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 88.73913043478261) internal successors, (2041), 23 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:42,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:26:42,873 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:26:42,877 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 10:26:43,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:26:43,073 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:26:43,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:26:43,074 INFO L85 PathProgramCache]: Analyzing trace with hash 257645199, now seen corresponding path program 25 times [2023-01-28 10:26:43,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:26:43,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677695089] [2023-01-28 10:26:43,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:26:43,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:26:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:26:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:26:43,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:26:43,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677695089] [2023-01-28 10:26:43,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677695089] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:26:43,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575011890] [2023-01-28 10:26:43,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:26:43,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:26:43,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:26:43,338 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 10:26:43,339 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 10:26:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:26:43,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 10:26:43,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:26:43,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 11 [2023-01-28 10:26:43,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 10:26:43,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 10:26:43,648 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2023-01-28 10:26:43,649 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 29 [2023-01-28 10:26:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:26:43,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:26:43,894 WARN L839 $PredicateComparison]: unable to prove that (forall ((~counter~0 Int) (~f~0.offset Int) (v_ArrVal_1363 (Array Int Int)) (v_~counter~0_246 Int) (~f~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1363))) (let ((.cse4 (select .cse3 ~f~0.base))) (let ((.cse1 (select .cse4 (+ (* v_~counter~0_246 4) ~f~0.offset)))) (let ((.cse0 (select .cse4 (+ (* ~counter~0 4) ~f~0.offset))) (.cse2 (select (select .cse3 c_~f_inv~0.base) (+ (* .cse1 4) c_~f_inv~0.offset)))) (or (<= c_~n_inv~0 .cse0) (<= c_~n_inv~0 .cse1) (< .cse2 0) (< .cse1 0) (= .cse2 0) (< .cse0 v_~counter~0_246) (not (= .cse2 v_~counter~0_246)))))))) is different from false [2023-01-28 10:26:44,068 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:26:44,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 283 treesize of output 175 [2023-01-28 10:26:44,139 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:26:44,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 1501 treesize of output 1425 [2023-01-28 10:26:44,279 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:26:44,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 1358 treesize of output 1130 [2023-01-28 10:26:44,412 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:26:44,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 959 treesize of output 941 [2023-01-28 10:31:07,878 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-28 10:31:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:31:07,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575011890] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:31:07,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:31:07,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2023-01-28 10:31:07,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390617399] [2023-01-28 10:31:07,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:31:07,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 10:31:07,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:31:07,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 10:31:07,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=310, Unknown=1, NotChecked=36, Total=420 [2023-01-28 10:31:07,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 305 [2023-01-28 10:31:07,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 954 transitions, 21489 flow. Second operand has 21 states, 21 states have (on average 92.04761904761905) internal successors, (1933), 21 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:07,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:31:07,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 305 [2023-01-28 10:31:07,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:31:10,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 10:31:12,205 INFO L130 PetriNetUnfolder]: 2601/5355 cut-off events. [2023-01-28 10:31:12,206 INFO L131 PetriNetUnfolder]: For 290815/290842 co-relation queries the response was YES. [2023-01-28 10:31:12,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59625 conditions, 5355 events. 2601/5355 cut-off events. For 290815/290842 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 44005 event pairs, 315 based on Foata normal form. 23/5362 useless extension candidates. Maximal degree in co-relation 58968. Up to 3767 conditions per place. [2023-01-28 10:31:12,271 INFO L137 encePairwiseOnDemand]: 297/305 looper letters, 707 selfloop transitions, 99 changer transitions 236/1051 dead transitions. [2023-01-28 10:31:12,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1051 transitions, 25451 flow [2023-01-28 10:31:12,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 10:31:12,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 10:31:12,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1052 transitions. [2023-01-28 10:31:12,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3135618479880775 [2023-01-28 10:31:12,272 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1052 transitions. [2023-01-28 10:31:12,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1052 transitions. [2023-01-28 10:31:12,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:31:12,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1052 transitions. [2023-01-28 10:31:12,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 95.63636363636364) internal successors, (1052), 11 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:12,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:12,275 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:12,275 INFO L175 Difference]: Start difference. First operand has 372 places, 954 transitions, 21489 flow. Second operand 11 states and 1052 transitions. [2023-01-28 10:31:12,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1051 transitions, 25451 flow [2023-01-28 10:31:14,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 1051 transitions, 25356 flow, removed 41 selfloop flow, removed 3 redundant places. [2023-01-28 10:31:14,245 INFO L231 Difference]: Finished difference. Result has 380 places, 789 transitions, 18054 flow [2023-01-28 10:31:14,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=21394, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=954, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=855, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18054, PETRI_PLACES=380, PETRI_TRANSITIONS=789} [2023-01-28 10:31:14,245 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 358 predicate places. [2023-01-28 10:31:14,245 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 789 transitions, 18054 flow [2023-01-28 10:31:14,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 92.04761904761905) internal successors, (1933), 21 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:14,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:31:14,246 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:31:14,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-01-28 10:31:14,446 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,SelfDestructingSolverStorable36 [2023-01-28 10:31:14,446 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:31:14,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:31:14,447 INFO L85 PathProgramCache]: Analyzing trace with hash -171269721, now seen corresponding path program 26 times [2023-01-28 10:31:14,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:31:14,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145788951] [2023-01-28 10:31:14,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:31:14,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:31:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:31:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:14,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:31:14,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145788951] [2023-01-28 10:31:14,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145788951] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:31:14,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331387192] [2023-01-28 10:31:14,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:31:14,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:31:14,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:31:14,505 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 10:31:14,507 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 10:31:14,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:31:14,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:31:14,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:31:14,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:31:14,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:14,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:31:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:14,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331387192] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:31:14,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:31:14,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-28 10:31:14,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722987851] [2023-01-28 10:31:14,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:31:14,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 10:31:14,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:31:14,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 10:31:14,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-01-28 10:31:14,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:31:14,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 789 transitions, 18054 flow. Second operand has 13 states, 13 states have (on average 129.30769230769232) internal successors, (1681), 13 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:14,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:31:14,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:31:14,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:31:16,456 INFO L130 PetriNetUnfolder]: 2436/5053 cut-off events. [2023-01-28 10:31:16,456 INFO L131 PetriNetUnfolder]: For 315175/315175 co-relation queries the response was YES. [2023-01-28 10:31:16,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57691 conditions, 5053 events. 2436/5053 cut-off events. For 315175/315175 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 40963 event pairs, 867 based on Foata normal form. 24/5075 useless extension candidates. Maximal degree in co-relation 57496. Up to 3941 conditions per place. [2023-01-28 10:31:16,613 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 734 selfloop transitions, 193 changer transitions 7/934 dead transitions. [2023-01-28 10:31:16,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 934 transitions, 23212 flow [2023-01-28 10:31:16,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 10:31:16,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 10:31:16,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1610 transitions. [2023-01-28 10:31:16,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43989071038251365 [2023-01-28 10:31:16,615 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1610 transitions. [2023-01-28 10:31:16,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1610 transitions. [2023-01-28 10:31:16,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:31:16,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1610 transitions. [2023-01-28 10:31:16,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 134.16666666666666) internal successors, (1610), 12 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:16,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 305.0) internal successors, (3965), 13 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:16,618 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 305.0) internal successors, (3965), 13 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:16,618 INFO L175 Difference]: Start difference. First operand has 380 places, 789 transitions, 18054 flow. Second operand 12 states and 1610 transitions. [2023-01-28 10:31:16,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 934 transitions, 23212 flow [2023-01-28 10:31:18,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 934 transitions, 22268 flow, removed 270 selfloop flow, removed 13 redundant places. [2023-01-28 10:31:18,151 INFO L231 Difference]: Finished difference. Result has 372 places, 861 transitions, 19893 flow [2023-01-28 10:31:18,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=17240, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=19893, PETRI_PLACES=372, PETRI_TRANSITIONS=861} [2023-01-28 10:31:18,152 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 350 predicate places. [2023-01-28 10:31:18,152 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 861 transitions, 19893 flow [2023-01-28 10:31:18,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 129.30769230769232) internal successors, (1681), 13 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:18,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:31:18,153 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:31:18,161 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 10:31:18,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-01-28 10:31:18,360 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:31:18,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:31:18,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1577925488, now seen corresponding path program 27 times [2023-01-28 10:31:18,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:31:18,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665260305] [2023-01-28 10:31:18,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:31:18,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:31:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:31:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:31:18,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:31:18,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665260305] [2023-01-28 10:31:18,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665260305] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:31:18,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435230710] [2023-01-28 10:31:18,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:31:18,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:31:18,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:31:18,614 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 10:31:18,616 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 10:31:18,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 10:31:18,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:31:18,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 31 conjunts are in the unsatisfiable core [2023-01-28 10:31:18,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:31:18,896 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2023-01-28 10:31:18,896 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 27 [2023-01-28 10:31:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:31:18,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:31:18,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:31:18,971 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 69 [2023-01-28 10:31:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:31:19,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435230710] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:31:19,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:31:19,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-01-28 10:31:19,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335638827] [2023-01-28 10:31:19,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:31:19,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 10:31:19,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:31:19,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 10:31:19,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-01-28 10:31:19,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 305 [2023-01-28 10:31:19,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 861 transitions, 19893 flow. Second operand has 16 states, 16 states have (on average 100.3125) internal successors, (1605), 16 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:19,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:31:19,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 305 [2023-01-28 10:31:19,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:31:21,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 10:31:23,072 INFO L130 PetriNetUnfolder]: 2436/5077 cut-off events. [2023-01-28 10:31:23,072 INFO L131 PetriNetUnfolder]: For 321986/322012 co-relation queries the response was YES. [2023-01-28 10:31:23,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58348 conditions, 5077 events. 2436/5077 cut-off events. For 321986/322012 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 41663 event pairs, 333 based on Foata normal form. 48/5108 useless extension candidates. Maximal degree in co-relation 57787. Up to 2766 conditions per place. [2023-01-28 10:31:23,135 INFO L137 encePairwiseOnDemand]: 298/305 looper letters, 528 selfloop transitions, 50 changer transitions 445/1032 dead transitions. [2023-01-28 10:31:23,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1032 transitions, 25014 flow [2023-01-28 10:31:23,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 10:31:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 10:31:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1159 transitions. [2023-01-28 10:31:23,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34545454545454546 [2023-01-28 10:31:23,137 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1159 transitions. [2023-01-28 10:31:23,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1159 transitions. [2023-01-28 10:31:23,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:31:23,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1159 transitions. [2023-01-28 10:31:23,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 105.36363636363636) internal successors, (1159), 11 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:23,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:23,139 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:23,139 INFO L175 Difference]: Start difference. First operand has 372 places, 861 transitions, 19893 flow. Second operand 11 states and 1159 transitions. [2023-01-28 10:31:23,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1032 transitions, 25014 flow [2023-01-28 10:31:24,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1032 transitions, 24605 flow, removed 169 selfloop flow, removed 7 redundant places. [2023-01-28 10:31:24,999 INFO L231 Difference]: Finished difference. Result has 379 places, 560 transitions, 12700 flow [2023-01-28 10:31:25,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=19500, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=861, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=811, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12700, PETRI_PLACES=379, PETRI_TRANSITIONS=560} [2023-01-28 10:31:25,001 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 357 predicate places. [2023-01-28 10:31:25,001 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 560 transitions, 12700 flow [2023-01-28 10:31:25,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 100.3125) internal successors, (1605), 16 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:25,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:31:25,002 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:31:25,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-01-28 10:31:25,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-28 10:31:25,206 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:31:25,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:31:25,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1890279399, now seen corresponding path program 28 times [2023-01-28 10:31:25,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:31:25,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368276619] [2023-01-28 10:31:25,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:31:25,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:31:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:31:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:25,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:31:25,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368276619] [2023-01-28 10:31:25,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368276619] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:31:25,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369433093] [2023-01-28 10:31:25,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:31:25,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:31:25,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:31:25,266 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 10:31:25,284 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 10:31:25,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:31:25,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:31:25,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:31:25,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:31:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:25,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:31:25,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 10:31:25,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369433093] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:31:25,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:31:25,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-28 10:31:25,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819355060] [2023-01-28 10:31:25,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:31:25,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 10:31:25,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:31:25,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 10:31:25,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-01-28 10:31:25,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:31:25,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 560 transitions, 12700 flow. Second operand has 13 states, 13 states have (on average 129.30769230769232) internal successors, (1681), 13 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:25,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:31:25,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:31:25,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:31:26,487 INFO L130 PetriNetUnfolder]: 1479/3009 cut-off events. [2023-01-28 10:31:26,488 INFO L131 PetriNetUnfolder]: For 185821/185821 co-relation queries the response was YES. [2023-01-28 10:31:26,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34270 conditions, 3009 events. 1479/3009 cut-off events. For 185821/185821 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 21700 event pairs, 256 based on Foata normal form. 20/3027 useless extension candidates. Maximal degree in co-relation 34091. Up to 1484 conditions per place. [2023-01-28 10:31:26,526 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 460 selfloop transitions, 170 changer transitions 12/642 dead transitions. [2023-01-28 10:31:26,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 642 transitions, 15356 flow [2023-01-28 10:31:26,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 10:31:26,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 10:31:26,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2131 transitions. [2023-01-28 10:31:26,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43668032786885247 [2023-01-28 10:31:26,528 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2131 transitions. [2023-01-28 10:31:26,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2131 transitions. [2023-01-28 10:31:26,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:31:26,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2131 transitions. [2023-01-28 10:31:26,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 133.1875) internal successors, (2131), 16 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:26,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 305.0) internal successors, (5185), 17 states have internal predecessors, (5185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:26,532 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 305.0) internal successors, (5185), 17 states have internal predecessors, (5185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:26,532 INFO L175 Difference]: Start difference. First operand has 379 places, 560 transitions, 12700 flow. Second operand 16 states and 2131 transitions. [2023-01-28 10:31:26,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 642 transitions, 15356 flow [2023-01-28 10:31:27,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 642 transitions, 14201 flow, removed 398 selfloop flow, removed 19 redundant places. [2023-01-28 10:31:27,329 INFO L231 Difference]: Finished difference. Result has 377 places, 565 transitions, 12291 flow [2023-01-28 10:31:27,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=11420, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=12291, PETRI_PLACES=377, PETRI_TRANSITIONS=565} [2023-01-28 10:31:27,330 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 355 predicate places. [2023-01-28 10:31:27,330 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 565 transitions, 12291 flow [2023-01-28 10:31:27,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 129.30769230769232) internal successors, (1681), 13 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:27,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:31:27,330 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:31:27,336 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 10:31:27,534 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,SelfDestructingSolverStorable39 [2023-01-28 10:31:27,535 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:31:27,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:31:27,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1375130251, now seen corresponding path program 29 times [2023-01-28 10:31:27,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:31:27,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793239082] [2023-01-28 10:31:27,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:31:27,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:31:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:31:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:27,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:31:27,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793239082] [2023-01-28 10:31:27,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793239082] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:31:27,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87897578] [2023-01-28 10:31:27,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:31:27,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:31:27,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:31:27,594 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 10:31:27,596 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 10:31:27,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:31:27,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:31:27,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:31:27,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:31:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:27,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:31:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:27,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87897578] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:31:27,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:31:27,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 10:31:27,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504776608] [2023-01-28 10:31:27,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:31:27,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 10:31:27,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:31:27,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 10:31:27,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-01-28 10:31:27,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:31:27,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 565 transitions, 12291 flow. Second operand has 15 states, 15 states have (on average 129.26666666666668) internal successors, (1939), 15 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:27,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:31:27,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:31:27,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:31:28,834 INFO L130 PetriNetUnfolder]: 1480/3015 cut-off events. [2023-01-28 10:31:28,835 INFO L131 PetriNetUnfolder]: For 187808/187808 co-relation queries the response was YES. [2023-01-28 10:31:28,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33926 conditions, 3015 events. 1480/3015 cut-off events. For 187808/187808 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 21671 event pairs, 268 based on Foata normal form. 16/3029 useless extension candidates. Maximal degree in co-relation 33191. Up to 1572 conditions per place. [2023-01-28 10:31:28,874 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 451 selfloop transitions, 173 changer transitions 12/636 dead transitions. [2023-01-28 10:31:28,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 636 transitions, 14967 flow [2023-01-28 10:31:28,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 10:31:28,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 10:31:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2638 transitions. [2023-01-28 10:31:28,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43245901639344264 [2023-01-28 10:31:28,877 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2638 transitions. [2023-01-28 10:31:28,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2638 transitions. [2023-01-28 10:31:28,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:31:28,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2638 transitions. [2023-01-28 10:31:28,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 131.9) internal successors, (2638), 20 states have internal predecessors, (2638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:28,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:28,882 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:28,882 INFO L175 Difference]: Start difference. First operand has 377 places, 565 transitions, 12291 flow. Second operand 20 states and 2638 transitions. [2023-01-28 10:31:28,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 636 transitions, 14967 flow [2023-01-28 10:31:29,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 636 transitions, 14356 flow, removed 272 selfloop flow, removed 7 redundant places. [2023-01-28 10:31:29,684 INFO L231 Difference]: Finished difference. Result has 395 places, 576 transitions, 12830 flow [2023-01-28 10:31:29,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=11859, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=12830, PETRI_PLACES=395, PETRI_TRANSITIONS=576} [2023-01-28 10:31:29,685 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 373 predicate places. [2023-01-28 10:31:29,685 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 576 transitions, 12830 flow [2023-01-28 10:31:29,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 129.26666666666668) internal successors, (1939), 15 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:29,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:31:29,685 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:31:29,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-01-28 10:31:29,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:31:29,886 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:31:29,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:31:29,886 INFO L85 PathProgramCache]: Analyzing trace with hash -763504331, now seen corresponding path program 30 times [2023-01-28 10:31:29,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:31:29,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369941178] [2023-01-28 10:31:29,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:31:29,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:31:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:31:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:29,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:31:29,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369941178] [2023-01-28 10:31:29,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369941178] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:31:29,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822846025] [2023-01-28 10:31:29,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:31:29,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:31:29,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:31:29,945 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 10:31:29,964 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 10:31:30,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 10:31:30,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:31:30,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:31:30,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:31:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:30,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:31:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:30,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822846025] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:31:30,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:31:30,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-01-28 10:31:30,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911281759] [2023-01-28 10:31:30,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:31:30,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 10:31:30,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:31:30,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 10:31:30,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-01-28 10:31:30,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:31:30,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 576 transitions, 12830 flow. Second operand has 11 states, 11 states have (on average 129.8181818181818) internal successors, (1428), 11 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:30,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:31:30,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:31:30,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:31:31,102 INFO L130 PetriNetUnfolder]: 1545/3127 cut-off events. [2023-01-28 10:31:31,103 INFO L131 PetriNetUnfolder]: For 189754/189754 co-relation queries the response was YES. [2023-01-28 10:31:31,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35209 conditions, 3127 events. 1545/3127 cut-off events. For 189754/189754 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 22388 event pairs, 218 based on Foata normal form. 10/3135 useless extension candidates. Maximal degree in co-relation 34409. Up to 2198 conditions per place. [2023-01-28 10:31:31,141 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 500 selfloop transitions, 138 changer transitions 4/642 dead transitions. [2023-01-28 10:31:31,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 642 transitions, 15378 flow [2023-01-28 10:31:31,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:31:31,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:31:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 946 transitions. [2023-01-28 10:31:31,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4430913348946136 [2023-01-28 10:31:31,143 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 946 transitions. [2023-01-28 10:31:31,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 946 transitions. [2023-01-28 10:31:31,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:31:31,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 946 transitions. [2023-01-28 10:31:31,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 135.14285714285714) internal successors, (946), 7 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:31,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 305.0) internal successors, (2440), 8 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:31,145 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 305.0) internal successors, (2440), 8 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:31,145 INFO L175 Difference]: Start difference. First operand has 395 places, 576 transitions, 12830 flow. Second operand 7 states and 946 transitions. [2023-01-28 10:31:31,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 642 transitions, 15378 flow [2023-01-28 10:31:32,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 642 transitions, 15117 flow, removed 90 selfloop flow, removed 8 redundant places. [2023-01-28 10:31:32,025 INFO L231 Difference]: Finished difference. Result has 395 places, 591 transitions, 13551 flow [2023-01-28 10:31:32,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=12573, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13551, PETRI_PLACES=395, PETRI_TRANSITIONS=591} [2023-01-28 10:31:32,025 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 373 predicate places. [2023-01-28 10:31:32,025 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 591 transitions, 13551 flow [2023-01-28 10:31:32,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 129.8181818181818) internal successors, (1428), 11 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:32,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:31:32,025 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:31:32,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-01-28 10:31:32,226 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,SelfDestructingSolverStorable41 [2023-01-28 10:31:32,226 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:31:32,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:31:32,226 INFO L85 PathProgramCache]: Analyzing trace with hash -407594943, now seen corresponding path program 31 times [2023-01-28 10:31:32,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:31:32,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455061012] [2023-01-28 10:31:32,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:31:32,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:31:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:31:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:32,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:31:32,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455061012] [2023-01-28 10:31:32,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455061012] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:31:32,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564493540] [2023-01-28 10:31:32,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:31:32,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:31:32,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:31:32,289 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 10:31:32,289 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 10:31:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:31:32,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:31:32,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:31:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:32,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:31:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:32,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564493540] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:31:32,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:31:32,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 10:31:32,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711525559] [2023-01-28 10:31:32,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:31:32,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 10:31:32,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:31:32,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 10:31:32,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-01-28 10:31:32,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:31:32,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 591 transitions, 13551 flow. Second operand has 12 states, 12 states have (on average 129.33333333333334) internal successors, (1552), 12 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:32,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:31:32,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:31:32,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:31:33,514 INFO L130 PetriNetUnfolder]: 1567/3165 cut-off events. [2023-01-28 10:31:33,514 INFO L131 PetriNetUnfolder]: For 212069/212069 co-relation queries the response was YES. [2023-01-28 10:31:33,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36819 conditions, 3165 events. 1567/3165 cut-off events. For 212069/212069 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 22738 event pairs, 353 based on Foata normal form. 8/3171 useless extension candidates. Maximal degree in co-relation 36243. Up to 1620 conditions per place. [2023-01-28 10:31:33,554 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 410 selfloop transitions, 275 changer transitions 2/687 dead transitions. [2023-01-28 10:31:33,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 687 transitions, 16875 flow [2023-01-28 10:31:33,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 10:31:33,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 10:31:33,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1747 transitions. [2023-01-28 10:31:33,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4406052963430013 [2023-01-28 10:31:33,556 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1747 transitions. [2023-01-28 10:31:33,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1747 transitions. [2023-01-28 10:31:33,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:31:33,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1747 transitions. [2023-01-28 10:31:33,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 134.3846153846154) internal successors, (1747), 13 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:33,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:33,559 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:33,559 INFO L175 Difference]: Start difference. First operand has 395 places, 591 transitions, 13551 flow. Second operand 13 states and 1747 transitions. [2023-01-28 10:31:33,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 687 transitions, 16875 flow [2023-01-28 10:31:34,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 687 transitions, 16670 flow, removed 30 selfloop flow, removed 6 redundant places. [2023-01-28 10:31:34,505 INFO L231 Difference]: Finished difference. Result has 398 places, 604 transitions, 14735 flow [2023-01-28 10:31:34,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=13380, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14735, PETRI_PLACES=398, PETRI_TRANSITIONS=604} [2023-01-28 10:31:34,506 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 376 predicate places. [2023-01-28 10:31:34,506 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 604 transitions, 14735 flow [2023-01-28 10:31:34,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 129.33333333333334) internal successors, (1552), 12 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:34,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:31:34,507 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:31:34,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-01-28 10:31:34,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:31:34,709 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:31:34,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:31:34,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1233284723, now seen corresponding path program 32 times [2023-01-28 10:31:34,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:31:34,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4787868] [2023-01-28 10:31:34,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:31:34,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:31:34,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:31:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:34,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:31:34,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4787868] [2023-01-28 10:31:34,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4787868] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:31:34,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875205883] [2023-01-28 10:31:34,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:31:34,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:31:34,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:31:34,764 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 10:31:34,766 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 10:31:34,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:31:34,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:31:34,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:31:34,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:31:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:34,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:31:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:34,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875205883] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:31:34,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:31:34,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-01-28 10:31:34,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422729355] [2023-01-28 10:31:34,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:31:34,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 10:31:34,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:31:34,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 10:31:34,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-28 10:31:34,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:31:34,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 604 transitions, 14735 flow. Second operand has 11 states, 11 states have (on average 129.45454545454547) internal successors, (1424), 11 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:34,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:31:34,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:31:34,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:31:36,032 INFO L130 PetriNetUnfolder]: 1567/3197 cut-off events. [2023-01-28 10:31:36,032 INFO L131 PetriNetUnfolder]: For 221829/221829 co-relation queries the response was YES. [2023-01-28 10:31:36,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38081 conditions, 3197 events. 1567/3197 cut-off events. For 221829/221829 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 23350 event pairs, 262 based on Foata normal form. 24/3219 useless extension candidates. Maximal degree in co-relation 37280. Up to 1453 conditions per place. [2023-01-28 10:31:36,071 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 468 selfloop transitions, 174 changer transitions 27/669 dead transitions. [2023-01-28 10:31:36,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 669 transitions, 17255 flow [2023-01-28 10:31:36,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 10:31:36,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 10:31:36,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1463 transitions. [2023-01-28 10:31:36,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4360655737704918 [2023-01-28 10:31:36,072 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1463 transitions. [2023-01-28 10:31:36,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1463 transitions. [2023-01-28 10:31:36,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:31:36,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1463 transitions. [2023-01-28 10:31:36,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 133.0) internal successors, (1463), 11 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:36,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:36,075 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:36,075 INFO L175 Difference]: Start difference. First operand has 398 places, 604 transitions, 14735 flow. Second operand 11 states and 1463 transitions. [2023-01-28 10:31:36,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 669 transitions, 17255 flow [2023-01-28 10:31:37,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 669 transitions, 16754 flow, removed 113 selfloop flow, removed 8 redundant places. [2023-01-28 10:31:37,032 INFO L231 Difference]: Finished difference. Result has 404 places, 603 transitions, 14889 flow [2023-01-28 10:31:37,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=14203, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14889, PETRI_PLACES=404, PETRI_TRANSITIONS=603} [2023-01-28 10:31:37,033 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 382 predicate places. [2023-01-28 10:31:37,033 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 603 transitions, 14889 flow [2023-01-28 10:31:37,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 129.45454545454547) internal successors, (1424), 11 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:37,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:31:37,033 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:31:37,038 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 10:31:37,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:31:37,237 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:31:37,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:31:37,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1274696957, now seen corresponding path program 33 times [2023-01-28 10:31:37,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:31:37,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492405064] [2023-01-28 10:31:37,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:31:37,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:31:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:31:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:37,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:31:37,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492405064] [2023-01-28 10:31:37,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492405064] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:31:37,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322018415] [2023-01-28 10:31:37,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:31:37,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:31:37,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:31:37,298 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 10:31:37,300 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 10:31:37,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:31:37,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:31:37,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:31:37,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:31:37,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:37,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:31:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:37,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322018415] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:31:37,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:31:37,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 10:31:37,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104812813] [2023-01-28 10:31:37,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:31:37,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 10:31:37,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:31:37,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 10:31:37,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-01-28 10:31:37,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:31:37,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 603 transitions, 14889 flow. Second operand has 12 states, 12 states have (on average 129.5) internal successors, (1554), 12 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:37,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:31:37,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:31:37,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:31:38,617 INFO L130 PetriNetUnfolder]: 1497/3077 cut-off events. [2023-01-28 10:31:38,617 INFO L131 PetriNetUnfolder]: For 223707/223707 co-relation queries the response was YES. [2023-01-28 10:31:38,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37351 conditions, 3077 events. 1497/3077 cut-off events. For 223707/223707 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 22503 event pairs, 180 based on Foata normal form. 38/3113 useless extension candidates. Maximal degree in co-relation 36716. Up to 1009 conditions per place. [2023-01-28 10:31:38,658 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 397 selfloop transitions, 283 changer transitions 7/687 dead transitions. [2023-01-28 10:31:38,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 687 transitions, 17621 flow [2023-01-28 10:31:38,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 10:31:38,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 10:31:38,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2399 transitions. [2023-01-28 10:31:38,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43697632058287794 [2023-01-28 10:31:38,660 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2399 transitions. [2023-01-28 10:31:38,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2399 transitions. [2023-01-28 10:31:38,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:31:38,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2399 transitions. [2023-01-28 10:31:38,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 133.27777777777777) internal successors, (2399), 18 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:38,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:38,664 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:38,664 INFO L175 Difference]: Start difference. First operand has 404 places, 603 transitions, 14889 flow. Second operand 18 states and 2399 transitions. [2023-01-28 10:31:38,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 687 transitions, 17621 flow [2023-01-28 10:31:39,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 687 transitions, 17223 flow, removed 181 selfloop flow, removed 5 redundant places. [2023-01-28 10:31:39,803 INFO L231 Difference]: Finished difference. Result has 415 places, 599 transitions, 15315 flow [2023-01-28 10:31:39,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=14234, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=15315, PETRI_PLACES=415, PETRI_TRANSITIONS=599} [2023-01-28 10:31:39,803 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 393 predicate places. [2023-01-28 10:31:39,803 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 599 transitions, 15315 flow [2023-01-28 10:31:39,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 129.5) internal successors, (1554), 12 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:39,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:31:39,804 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:31:39,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-01-28 10:31:40,008 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,SelfDestructingSolverStorable44 [2023-01-28 10:31:40,008 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:31:40,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:31:40,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1886138305, now seen corresponding path program 34 times [2023-01-28 10:31:40,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:31:40,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329727411] [2023-01-28 10:31:40,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:31:40,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:31:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:31:40,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:40,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:31:40,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329727411] [2023-01-28 10:31:40,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329727411] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:31:40,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825925997] [2023-01-28 10:31:40,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:31:40,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:31:40,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:31:40,066 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 10:31:40,068 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 10:31:40,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:31:40,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:31:40,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:31:40,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:31:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:40,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:31:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:40,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825925997] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:31:40,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:31:40,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-01-28 10:31:40,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484641258] [2023-01-28 10:31:40,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:31:40,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 10:31:40,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:31:40,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 10:31:40,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-01-28 10:31:40,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:31:40,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 599 transitions, 15315 flow. Second operand has 13 states, 13 states have (on average 129.53846153846155) internal successors, (1684), 13 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:40,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:31:40,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:31:40,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:31:41,323 INFO L130 PetriNetUnfolder]: 1444/2949 cut-off events. [2023-01-28 10:31:41,323 INFO L131 PetriNetUnfolder]: For 205252/205252 co-relation queries the response was YES. [2023-01-28 10:31:41,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35758 conditions, 2949 events. 1444/2949 cut-off events. For 205252/205252 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 21185 event pairs, 250 based on Foata normal form. 16/2963 useless extension candidates. Maximal degree in co-relation 35123. Up to 1410 conditions per place. [2023-01-28 10:31:41,361 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 429 selfloop transitions, 211 changer transitions 11/651 dead transitions. [2023-01-28 10:31:41,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 651 transitions, 17247 flow [2023-01-28 10:31:41,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 10:31:41,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 10:31:41,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2117 transitions. [2023-01-28 10:31:41,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43381147540983606 [2023-01-28 10:31:41,363 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2117 transitions. [2023-01-28 10:31:41,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2117 transitions. [2023-01-28 10:31:41,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:31:41,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2117 transitions. [2023-01-28 10:31:41,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 132.3125) internal successors, (2117), 16 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:41,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 305.0) internal successors, (5185), 17 states have internal predecessors, (5185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:41,367 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 305.0) internal successors, (5185), 17 states have internal predecessors, (5185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:41,367 INFO L175 Difference]: Start difference. First operand has 415 places, 599 transitions, 15315 flow. Second operand 16 states and 2117 transitions. [2023-01-28 10:31:41,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 651 transitions, 17247 flow [2023-01-28 10:31:42,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 651 transitions, 16788 flow, removed 116 selfloop flow, removed 9 redundant places. [2023-01-28 10:31:42,338 INFO L231 Difference]: Finished difference. Result has 420 places, 589 transitions, 14983 flow [2023-01-28 10:31:42,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=14699, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=14983, PETRI_PLACES=420, PETRI_TRANSITIONS=589} [2023-01-28 10:31:42,339 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 398 predicate places. [2023-01-28 10:31:42,339 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 589 transitions, 14983 flow [2023-01-28 10:31:42,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 129.53846153846155) internal successors, (1684), 13 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:42,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:31:42,339 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:31:42,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-01-28 10:31:42,540 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,SelfDestructingSolverStorable45 [2023-01-28 10:31:42,540 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:31:42,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:31:42,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1585515753, now seen corresponding path program 35 times [2023-01-28 10:31:42,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:31:42,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752865951] [2023-01-28 10:31:42,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:31:42,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:31:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:31:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:42,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:31:42,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752865951] [2023-01-28 10:31:42,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752865951] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:31:42,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240708337] [2023-01-28 10:31:42,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:31:42,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:31:42,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:31:42,598 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 10:31:42,598 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 10:31:42,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:31:42,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:31:42,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:31:42,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:31:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:42,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:31:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:42,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240708337] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:31:42,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:31:42,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 10:31:42,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148055965] [2023-01-28 10:31:42,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:31:42,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 10:31:42,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:31:42,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 10:31:42,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-01-28 10:31:42,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:31:42,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 589 transitions, 14983 flow. Second operand has 15 states, 15 states have (on average 129.2) internal successors, (1938), 15 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:42,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:31:42,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:31:42,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:31:43,838 INFO L130 PetriNetUnfolder]: 1450/2979 cut-off events. [2023-01-28 10:31:43,838 INFO L131 PetriNetUnfolder]: For 214652/214652 co-relation queries the response was YES. [2023-01-28 10:31:43,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36197 conditions, 2979 events. 1450/2979 cut-off events. For 214652/214652 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 21508 event pairs, 57 based on Foata normal form. 40/3017 useless extension candidates. Maximal degree in co-relation 35545. Up to 1158 conditions per place. [2023-01-28 10:31:43,875 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 414 selfloop transitions, 247 changer transitions 16/677 dead transitions. [2023-01-28 10:31:43,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 677 transitions, 18277 flow [2023-01-28 10:31:43,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 10:31:43,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 10:31:43,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2778 transitions. [2023-01-28 10:31:43,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43372365339578456 [2023-01-28 10:31:43,878 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2778 transitions. [2023-01-28 10:31:43,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2778 transitions. [2023-01-28 10:31:43,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:31:43,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2778 transitions. [2023-01-28 10:31:43,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 132.28571428571428) internal successors, (2778), 21 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:43,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:43,882 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:43,882 INFO L175 Difference]: Start difference. First operand has 420 places, 589 transitions, 14983 flow. Second operand 21 states and 2778 transitions. [2023-01-28 10:31:43,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 677 transitions, 18277 flow [2023-01-28 10:31:44,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 677 transitions, 18075 flow, removed 10 selfloop flow, removed 8 redundant places. [2023-01-28 10:31:44,855 INFO L231 Difference]: Finished difference. Result has 436 places, 602 transitions, 16323 flow [2023-01-28 10:31:44,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=14674, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=16323, PETRI_PLACES=436, PETRI_TRANSITIONS=602} [2023-01-28 10:31:44,856 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 414 predicate places. [2023-01-28 10:31:44,856 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 602 transitions, 16323 flow [2023-01-28 10:31:44,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 129.2) internal successors, (1938), 15 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:44,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:31:44,856 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:31:44,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-01-28 10:31:45,061 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,SelfDestructingSolverStorable46 [2023-01-28 10:31:45,061 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:31:45,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:31:45,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1801594441, now seen corresponding path program 36 times [2023-01-28 10:31:45,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:31:45,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565552698] [2023-01-28 10:31:45,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:31:45,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:31:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:31:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:45,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:31:45,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565552698] [2023-01-28 10:31:45,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565552698] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:31:45,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639929625] [2023-01-28 10:31:45,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:31:45,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:31:45,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:31:45,117 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 10:31:45,119 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 10:31:45,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 10:31:45,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:31:45,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:31:45,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:31:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:45,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:31:45,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:45,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639929625] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:31:45,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:31:45,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-28 10:31:45,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916912169] [2023-01-28 10:31:45,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:31:45,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 10:31:45,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:31:45,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 10:31:45,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-01-28 10:31:45,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:31:45,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 602 transitions, 16323 flow. Second operand has 13 states, 13 states have (on average 129.23076923076923) internal successors, (1680), 13 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:45,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:31:45,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:31:45,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:31:46,504 INFO L130 PetriNetUnfolder]: 1512/3071 cut-off events. [2023-01-28 10:31:46,504 INFO L131 PetriNetUnfolder]: For 254306/254306 co-relation queries the response was YES. [2023-01-28 10:31:46,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39530 conditions, 3071 events. 1512/3071 cut-off events. For 254306/254306 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 21953 event pairs, 140 based on Foata normal form. 16/3085 useless extension candidates. Maximal degree in co-relation 38865. Up to 1943 conditions per place. [2023-01-28 10:31:46,541 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 487 selfloop transitions, 200 changer transitions 0/687 dead transitions. [2023-01-28 10:31:46,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 687 transitions, 19816 flow [2023-01-28 10:31:46,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 10:31:46,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 10:31:46,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1995 transitions. [2023-01-28 10:31:46,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4360655737704918 [2023-01-28 10:31:46,543 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1995 transitions. [2023-01-28 10:31:46,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1995 transitions. [2023-01-28 10:31:46,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:31:46,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1995 transitions. [2023-01-28 10:31:46,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 133.0) internal successors, (1995), 15 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:46,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 305.0) internal successors, (4880), 16 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:46,547 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 305.0) internal successors, (4880), 16 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:46,547 INFO L175 Difference]: Start difference. First operand has 436 places, 602 transitions, 16323 flow. Second operand 15 states and 1995 transitions. [2023-01-28 10:31:46,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 687 transitions, 19816 flow [2023-01-28 10:31:47,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 687 transitions, 18868 flow, removed 327 selfloop flow, removed 13 redundant places. [2023-01-28 10:31:47,631 INFO L231 Difference]: Finished difference. Result has 436 places, 628 transitions, 16996 flow [2023-01-28 10:31:47,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=15296, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=16996, PETRI_PLACES=436, PETRI_TRANSITIONS=628} [2023-01-28 10:31:47,632 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 414 predicate places. [2023-01-28 10:31:47,632 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 628 transitions, 16996 flow [2023-01-28 10:31:47,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 129.23076923076923) internal successors, (1680), 13 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:47,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:31:47,632 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:31:47,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-01-28 10:31:47,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-01-28 10:31:47,833 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:31:47,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:31:47,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1445730676, now seen corresponding path program 37 times [2023-01-28 10:31:47,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:31:47,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055286713] [2023-01-28 10:31:47,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:31:47,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:31:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:31:47,899 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-28 10:31:47,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:31:47,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055286713] [2023-01-28 10:31:47,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055286713] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:31:47,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365617996] [2023-01-28 10:31:47,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:31:47,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:31:47,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:31:47,900 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 10:31:47,901 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 10:31:48,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:31:48,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 10:31:48,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:31:48,105 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:31:48,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:31:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 10:31:48,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365617996] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:31:48,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:31:48,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 15 [2023-01-28 10:31:48,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121369747] [2023-01-28 10:31:48,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:31:48,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 10:31:48,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:31:48,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 10:31:48,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-01-28 10:31:48,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 10:31:48,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 628 transitions, 16996 flow. Second operand has 15 states, 15 states have (on average 129.13333333333333) internal successors, (1937), 15 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:48,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:31:48,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 10:31:48,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:31:49,423 INFO L130 PetriNetUnfolder]: 1648/3357 cut-off events. [2023-01-28 10:31:49,423 INFO L131 PetriNetUnfolder]: For 275304/275304 co-relation queries the response was YES. [2023-01-28 10:31:49,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42393 conditions, 3357 events. 1648/3357 cut-off events. For 275304/275304 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24424 event pairs, 589 based on Foata normal form. 64/3419 useless extension candidates. Maximal degree in co-relation 41727. Up to 2818 conditions per place. [2023-01-28 10:31:49,471 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 625 selfloop transitions, 92 changer transitions 11/728 dead transitions. [2023-01-28 10:31:49,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 728 transitions, 20379 flow [2023-01-28 10:31:49,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 10:31:49,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 10:31:49,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2137 transitions. [2023-01-28 10:31:49,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43790983606557377 [2023-01-28 10:31:49,539 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2137 transitions. [2023-01-28 10:31:49,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2137 transitions. [2023-01-28 10:31:49,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:31:49,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2137 transitions. [2023-01-28 10:31:49,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 133.5625) internal successors, (2137), 16 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:49,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 305.0) internal successors, (5185), 17 states have internal predecessors, (5185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:49,542 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 305.0) internal successors, (5185), 17 states have internal predecessors, (5185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:49,542 INFO L175 Difference]: Start difference. First operand has 436 places, 628 transitions, 16996 flow. Second operand 16 states and 2137 transitions. [2023-01-28 10:31:49,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 728 transitions, 20379 flow [2023-01-28 10:31:50,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 728 transitions, 19961 flow, removed 170 selfloop flow, removed 8 redundant places. [2023-01-28 10:31:50,839 INFO L231 Difference]: Finished difference. Result has 449 places, 659 transitions, 17689 flow [2023-01-28 10:31:50,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=16514, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=17689, PETRI_PLACES=449, PETRI_TRANSITIONS=659} [2023-01-28 10:31:50,839 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 427 predicate places. [2023-01-28 10:31:50,839 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 659 transitions, 17689 flow [2023-01-28 10:31:50,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 129.13333333333333) internal successors, (1937), 15 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:50,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:31:50,840 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:31:50,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-01-28 10:31:51,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:31:51,040 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:31:51,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:31:51,041 INFO L85 PathProgramCache]: Analyzing trace with hash -17680531, now seen corresponding path program 38 times [2023-01-28 10:31:51,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:31:51,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094211425] [2023-01-28 10:31:51,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:31:51,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:31:51,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:31:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:31:52,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:31:52,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094211425] [2023-01-28 10:31:52,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094211425] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:31:52,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612672658] [2023-01-28 10:31:52,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:31:52,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:31:52,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:31:52,141 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 10:31:52,142 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 10:31:52,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:31:52,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:31:52,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 31 conjunts are in the unsatisfiable core [2023-01-28 10:31:52,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:31:53,803 INFO L321 Elim1Store]: treesize reduction 49, result has 53.3 percent of original size [2023-01-28 10:31:53,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 93 [2023-01-28 10:31:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:31:53,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:31:59,388 INFO L321 Elim1Store]: treesize reduction 53, result has 53.9 percent of original size [2023-01-28 10:31:59,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 105 [2023-01-28 10:31:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:31:59,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612672658] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:31:59,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:31:59,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 4] total 19 [2023-01-28 10:31:59,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126616258] [2023-01-28 10:31:59,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:31:59,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 10:31:59,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:31:59,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 10:31:59,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2023-01-28 10:31:59,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 305 [2023-01-28 10:31:59,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 659 transitions, 17689 flow. Second operand has 21 states, 21 states have (on average 89.0) internal successors, (1869), 21 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:59,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:31:59,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 305 [2023-01-28 10:31:59,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:32:01,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 10:32:10,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 10:32:13,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 10:32:15,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 10:32:17,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 10:32:19,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 10:32:26,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 10:32:29,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 10:32:32,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 10:32:33,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 10:32:35,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 10:32:37,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 10:32:42,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 10:32:44,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 10:32:46,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 10:32:49,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 10:32:52,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 10:32:55,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 10:32:55,956 INFO L130 PetriNetUnfolder]: 2526/5180 cut-off events. [2023-01-28 10:32:55,956 INFO L131 PetriNetUnfolder]: For 495258/495267 co-relation queries the response was YES. [2023-01-28 10:32:56,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69412 conditions, 5180 events. 2526/5180 cut-off events. For 495258/495267 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 41439 event pairs, 297 based on Foata normal form. 21/5191 useless extension candidates. Maximal degree in co-relation 68590. Up to 3265 conditions per place. [2023-01-28 10:32:56,040 INFO L137 encePairwiseOnDemand]: 297/305 looper letters, 730 selfloop transitions, 340 changer transitions 10/1090 dead transitions. [2023-01-28 10:32:56,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 1090 transitions, 31653 flow [2023-01-28 10:32:56,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 10:32:56,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 10:32:56,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1936 transitions. [2023-01-28 10:32:56,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30226385636221703 [2023-01-28 10:32:56,042 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1936 transitions. [2023-01-28 10:32:56,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1936 transitions. [2023-01-28 10:32:56,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:32:56,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1936 transitions. [2023-01-28 10:32:56,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 92.19047619047619) internal successors, (1936), 21 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:32:56,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:32:56,046 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:32:56,046 INFO L175 Difference]: Start difference. First operand has 449 places, 659 transitions, 17689 flow. Second operand 21 states and 1936 transitions. [2023-01-28 10:32:56,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 1090 transitions, 31653 flow [2023-01-28 10:32:58,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 1090 transitions, 31236 flow, removed 135 selfloop flow, removed 6 redundant places. [2023-01-28 10:32:58,510 INFO L231 Difference]: Finished difference. Result has 467 places, 939 transitions, 26861 flow [2023-01-28 10:32:58,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=17344, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=26861, PETRI_PLACES=467, PETRI_TRANSITIONS=939} [2023-01-28 10:32:58,511 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 445 predicate places. [2023-01-28 10:32:58,511 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 939 transitions, 26861 flow [2023-01-28 10:32:58,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 89.0) internal successors, (1869), 21 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:32:58,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:32:58,512 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:32:58,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-01-28 10:32:58,712 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,SelfDestructingSolverStorable49 [2023-01-28 10:32:58,712 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:32:58,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:32:58,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1457294297, now seen corresponding path program 39 times [2023-01-28 10:32:58,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:32:58,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527696771] [2023-01-28 10:32:58,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:32:58,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:32:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:33:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:33:00,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:33:00,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527696771] [2023-01-28 10:33:00,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527696771] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:33:00,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968184864] [2023-01-28 10:33:00,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:33:00,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:33:00,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:33:00,314 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 10:33:00,315 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 10:33:00,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 10:33:00,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:33:00,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 59 conjunts are in the unsatisfiable core [2023-01-28 10:33:00,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:33:00,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-01-28 10:33:00,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 10:33:00,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 10:33:00,968 INFO L321 Elim1Store]: treesize reduction 73, result has 27.7 percent of original size [2023-01-28 10:33:00,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 114 treesize of output 64 [2023-01-28 10:33:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:33:00,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:33:01,376 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:33:01,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 382 treesize of output 226 [2023-01-28 10:33:03,706 INFO L321 Elim1Store]: treesize reduction 11, result has 98.9 percent of original size [2023-01-28 10:33:03,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 17 new quantified variables, introduced 55 case distinctions, treesize of input 8968 treesize of output 7827 [2023-01-28 10:33:05,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:33:05,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 17 new quantified variables, introduced 55 case distinctions, treesize of input 2072 treesize of output 2352 [2023-01-28 10:33:07,520 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:33:07,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 17 new quantified variables, introduced 55 case distinctions, treesize of input 2051 treesize of output 1863 Received shutdown request... [2023-01-28 10:39:21,553 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 10:39:21,553 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 10:39:21,556 WARN L238 SmtUtils]: Removed 2 from assertion stack [2023-01-28 10:39:21,559 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 10:39:21,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-01-28 10:39:21,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:39:21,759 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 25ms.. [2023-01-28 10:39:21,761 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 10:39:21,761 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 10:39:21,761 INFO L445 BasicCegarLoop]: Path program histogram: [39, 3, 3, 2, 1, 1, 1, 1] [2023-01-28 10:39:21,763 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 10:39:21,763 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 10:39:21,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 10:39:21 BasicIcfg [2023-01-28 10:39:21,765 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 10:39:21,765 INFO L158 Benchmark]: Toolchain (without parser) took 839473.56ms. Allocated memory was 390.1MB in the beginning and 2.0GB in the end (delta: 1.7GB). Free memory was 348.6MB in the beginning and 925.1MB in the end (delta: -576.4MB). Peak memory consumption was 1.3GB. Max. memory is 16.0GB. [2023-01-28 10:39:21,765 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 255.9MB. Free memory is still 214.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 10:39:21,765 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.47ms. Allocated memory is still 390.1MB. Free memory was 348.2MB in the beginning and 336.9MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 10:39:21,765 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.91ms. Allocated memory is still 390.1MB. Free memory was 336.9MB in the beginning and 334.5MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 10:39:21,765 INFO L158 Benchmark]: Boogie Preprocessor took 33.01ms. Allocated memory is still 390.1MB. Free memory was 334.5MB in the beginning and 332.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 10:39:21,765 INFO L158 Benchmark]: RCFGBuilder took 507.17ms. Allocated memory is still 390.1MB. Free memory was 332.8MB in the beginning and 297.9MB in the end (delta: 34.9MB). Peak memory consumption was 35.7MB. Max. memory is 16.0GB. [2023-01-28 10:39:21,766 INFO L158 Benchmark]: TraceAbstraction took 838684.47ms. Allocated memory was 390.1MB in the beginning and 2.0GB in the end (delta: 1.7GB). Free memory was 297.1MB in the beginning and 925.1MB in the end (delta: -627.9MB). Peak memory consumption was 1.3GB. Max. memory is 16.0GB. [2023-01-28 10:39:21,766 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 255.9MB. Free memory is still 214.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 196.47ms. Allocated memory is still 390.1MB. Free memory was 348.2MB in the beginning and 336.9MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 44.91ms. Allocated memory is still 390.1MB. Free memory was 336.9MB in the beginning and 334.5MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 33.01ms. Allocated memory is still 390.1MB. Free memory was 334.5MB in the beginning and 332.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 507.17ms. Allocated memory is still 390.1MB. Free memory was 332.8MB in the beginning and 297.9MB in the end (delta: 34.9MB). Peak memory consumption was 35.7MB. Max. memory is 16.0GB. * TraceAbstraction took 838684.47ms. Allocated memory was 390.1MB in the beginning and 2.0GB in the end (delta: 1.7GB). Free memory was 297.1MB in the beginning and 925.1MB in the end (delta: -627.9MB). Peak memory consumption was 1.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.1s, 139 PlacesBefore, 22 PlacesAfterwards, 145 TransitionsBefore, 19 TransitionsAfterwards, 500 CoEnabledTransitionPairs, 7 FixpointIterations, 100 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 20 TrivialYvCompositions, 4 ConcurrentYvCompositions, 9 ChoiceCompositions, 150 TotalNumberOfCompositions, 553 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 530, independent: 520, independent conditional: 0, independent unconditional: 520, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 263, independent: 258, independent conditional: 0, independent unconditional: 258, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 530, independent: 262, independent conditional: 0, independent unconditional: 262, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 263, unknown conditional: 0, unknown unconditional: 263] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 20, Positive conditional cache size: 0, Positive unconditional cache size: 20, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 25ms.. - TimeoutResultAtElement [Line: 82]: 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 24 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 25ms.. - 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 24 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 25ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 163 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 838.6s, OverallIterations: 51, TraceHistogramMax: 3, PathProgramHistogramMax: 39, EmptinessCheckTime: 0.0s, AutomataDifference: 150.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.3s, HoareTripleCheckerStatistics: 18 mSolverCounterUnknown, 3320 SdHoareTripleChecker+Valid, 55.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3320 mSDsluCounter, 395 SdHoareTripleChecker+Invalid, 53.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 267 IncrementalHoareTripleChecker+Unchecked, 247 mSDsCounter, 420 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13663 IncrementalHoareTripleChecker+Invalid, 14368 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 420 mSolverCounterUnsat, 148 mSDtfsCounter, 13663 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2532 GetRequests, 1602 SyntacticMatches, 104 SemanticMatches, 826 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 3924 ImplicationChecksByTransitivity, 28.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26861occurred in iteration=50, InterpolantAutomatonStates: 635, 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: 0.5s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 285.8s InterpolantComputationTime, 1913 NumberOfCodeBlocks, 1869 NumberOfCodeBlocksAsserted, 128 NumberOfCheckSat, 2643 ConstructedInterpolants, 37 QuantifiedInterpolants, 11557 SizeOfPredicates, 222 NumberOfNonLiveVariables, 9859 ConjunctsInSsa, 428 ConjunctsInUnsatCore, 134 InterpolantComputations, 9 PerfectInterpolantSequences, 720/1037 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